56 results about "Transient-voltage-suppression diode" patented technology

The application discloses a kind of excitation control circuit with multiple de-excitation loop for aviation three-stage power generation system, including: resonant de-excitation capacitor C2, de-excitation switch S1, de-excitation switch S2, anti-reverse diode D1, freewheeling diode D2, freewheeling diode D3, transient voltage suppression diode D4, voltage regulating MOS tube Q1, voltage regulating MOS tube Q2, de-excitation resistor R1 and excitation winding L;Wherein, the positive terminal of DC power supply DC+ is connected to the anode of anti-reverse diode D1, the cathode of anti-reverse diode D1 is sequentially connected to the negative terminal of DC power supply DC- by de-excitation switch S1 and resonant de-excitation capacitor C2;The cathode of anti-reverse diode D1 is respectively connected to the drain of voltage regulating MOS tube Q1, the negative electrode of freewheeling diode D3 and one end of de-excitation switch S2, the source of voltage regulating MOS tube Q1 is respectively connected to the positive electrode F+ of excitation winding L, the negative electrode of freewheeling diode D2;The anode of freewheeling diode D3 is respectively connected to the negative electrode F- of excitation winding L, the drain of voltage regulating MOS tube Q2 and the negative electrode of transient voltage suppression diode D4, the other end of de-excitation switch S2 is respectively connected to the positive electrode of transient voltage suppression diode D4 and one end of de-excitation resistor R1;The anode of freewheeling diode D2, the source of voltage regulating MOS tube Q2 and the other end of de-excitation resistor R1 are respectively connected to the negative terminal of DC power supply DC-.The technical scheme of the application solves the problem that the freewheeling diode added between excitation voltages in the existing excitation circuit cannot consume the energy of magnetic field, and the de-excitation speed is slow.

The utility model discloses a kind of drive circuits, belong to electric bicycle instrument technical field, specifically related to a kind of electric bicycle instrument drive circuit, comprising: conversion module, output filter and high voltage surge suppression module;Output filter and high voltage surge suppression module are connected with conversion module;Conversion module includes: MOS tube Q6, MOS tube Q9, resistance R20, resistance R19, resistance R18, triode Q5 and triode Q10;Output filter includes: inductance L2, electrolytic capacitor C15, electrolytic capacitor C14, capacitor C13;High voltage surge suppression module includes: transient voltage suppression diode D5;The utility model uses wide input voltage range, high-efficiency switching power supply, replaces traditional linear voltage stabilizer, and efficiency is higher, and heat is smaller, and tolerance to input voltage fluctuation is better, while increasing greater capacity input electrolytic capacitor, effectively absorb transient surge and fill transient voltage drop, in addition, TVS diode is used to suppress high voltage surge, and self-recovery fuse is used to prevent overcurrent.

The utility model discloses a surge protection circuit, a controller, a battery management system, power distribution equipment and a vehicle. The surge protection circuit comprises a first transient voltage suppressor diode and a second transient voltage suppressor diode, the anode of the first transient voltage suppressor diode is connected with the anode of the second transient voltage suppressor diode, and the cathode of the first transient voltage suppressor diode is suitable for being connected with the anode end of a power supply. The cathode of the second transient voltage suppression diode is suitable for being connected with the negative terminal of the power supply and the first grounding terminal. According to the surge protection circuit, when a positive surge occurs and the first transient voltage suppressor diode is broken down, the second transient voltage suppressor diode can serve as a common diode to be conducted, surge voltage is discharged from the first grounding end, and when a negative surge occurs and the second transient voltage suppressor diode is broken down, the surge voltage is discharged from the second grounding end. And the first transient voltage suppression diode can be conducted as a common diode, so that the surge resistance of a subsequent circuit can be improved.

The utility model discloses a Hall sensor circuit for cabinet door state detection, and belongs to the field of sensor circuits. Comprising a Hall sensor module, a filtering module, a voltage protection module, a current limiting module, a state indication module and a signal output interface module. The Hall sensor module is used for sensing a magnetic field signal generated by the position change of the cabinet door and outputting a corresponding level signal; the filtering module is composed of a pi-type filtering circuit composed of a capacitor and an inductor and is used for suppressing high-frequency interference of a power supply and improving power supply stability. The voltage protection module adopts a transient voltage suppression diode to realize input surge suppression; the current limiting module is composed of a plurality of resistors and is used for limiting output current and realizing signal level voltage division conditioning; the state indication module indicates the state of the cabinet door in real time through a light-emitting diode; and the signal output interface module is used for transmitting the processed signal to a control system. The circuit has the advantages of simple structure, strong anti-interference capability, high adaptability and good detection reliability.

The invention discloses a multi-power-supply pre-drive control circuit device and method. The multi-power-supply pre-drive control circuit device comprises a power supply module, a pre-drive driving module, a switch control output module, a current sampling module and a micro-control processor module, the power supply module is connected with the pre-drive module; the pre-driving module is connected with the switch control output module; the switch control output module is connected with the current sampling module; and the current sampling module is connected with the micro-control processor module. The system has the advantages that dynamic adjustment can be carried out according to actual load requirements through double-circuit power supply, the system is suitable for small-current loads and can also cope with large-current peak values, and flexibility and expansibility are achieved; a pre-driving chip is adopted, driving and protection functions are integrated, serial peripheral interface (SPI) communication is supported, and system configuration and state monitoring are facilitated; through the multi-protection design of an anti-reverse connection circuit, a transient voltage suppressor (TVS) tube, a filter circuit and the like, the stability and the electromagnetic compatibility (EMC) performance in a complex automobile electronic environment are improved.

The utility model relates to the technical field of digital output circuits, and discloses an isolated DO electrostatic protection circuit, which comprises an isolated DO circuit, the isolated DO circuit comprises a filter capacitor bank and a voltage control type relay which are electrically connected, the voltage control type relay comprises a coil and a contact switch which are arranged in an isolated manner, and the filter capacitor bank is electrically connected with the voltage control type relay. And the output end of the voltage control type relay is connected in parallel with at least one of the capacitor C5, the piezoresistor RV1 and the transient voltage suppression diode TVS1. According to the utility model, by additionally arranging the TVS diode, the piezoresistor and other structures and carrying out simple circuit improvement, static electricity of the isolated DO can be timely dredged only by using fewer electrical elements, so that the anti-interference capability of equipment is improved, the stability and the reliability of the equipment are enhanced, a series of losses caused by static electricity faults are reduced, and the safety of the equipment is improved. The product economic benefit is further improved.

The embodiment of the utility model provides a measurement system of a transient voltage suppressor (TVS), belongs to the technical field of electronics, and aims to solve the problem of large measurement error of the breakdown voltage VBR of the TVS so as to improve the accuracy of measuring the breakdown voltage VBR of the TVS. The system comprises a control unit; the current measuring unit, the first resistor and the transient voltage suppression diode are connected in series to form a series structure; the current excitation measurement unit is connected in series with the series structure; the first voltage measuring unit is connected with the series structure in parallel; wherein the control unit is used for controlling the current excitation measurement unit, the first voltage measurement unit and the current measurement unit to measure the transient voltage suppression diode.

The utility model relates to the related field of diode packaging structures, in particular to a transient suppression diode packaging structure with a power enhancement function, which comprises a device body, an upper shell, a lower shell, a connecting assembly, a pin assembly, a boss and a chip are arranged in the device body, the upper shell and the lower shell are symmetrically arranged, and the connecting assembly is connected with the pin assembly. The connecting assembly is installed between the upper shell and the lower shell, the two pin assemblies are symmetrically located at the outer ends of the upper shell and the lower shell, bosses are arranged in the upper shell and the lower shell respectively, embedded grooves are formed in the inner sides of the bosses, and the chip is correspondingly connected between the two embedded grooves. The connecting assembly comprises an upper sleeve and a lower sleeve, and the pin assembly comprises a mounting plate and a hinge seat, so that folding and limiting of a pin piece can be realized, flexible use or storage of the pin piece is facilitated, convenient disassembly and assembly operation between the upper shell and the lower shell can be realized, and disassembly, maintenance or replacement of a chip is facilitated.

The application discloses a protection circuit of a display module and the display module. The protection circuit comprises at least one protector and a timing controller. A first functional pin of a connector in the display module is electrically connected with an input end of the protector, and an output end of the protector is electrically connected with an input end of the timing controller. The protector comprises a transient voltage suppression diode and a voltage stabilizing diode. The first functional pin is electrically connected with the transient voltage suppression diode, and the output voltage of the first functional pin is adjusted to a first voltage by the transient voltage suppression diode. The first functional pin and the transient voltage suppression diode are respectively electrically connected with the voltage stabilizing diode, and the input voltage of the voltage stabilizing diode is adjusted to a safe working voltage of the timing controller by the voltage stabilizing diode. By arranging the protector between the connector and the timing controller, the electrostatic discharge protection of the timing controller is realized, and the voltage short circuit problem is avoided, so that the reliability of the protection circuit is improved.

The invention discloses a low-voltage low-clamping low-leakage transient suppression diode and a preparation method thereof. Relates to the technical field of diodes. Comprising the following steps: step 1, selecting a P-type silicon substrate; step 2, initial oxidation; growing a layer of oxidation film on the surface of the wafer through a thermal oxidation method in a dry oxygen atmosphere; step 3, protecting the front area with a photoresist, and defining a photoresist pattern of the front area through exposure and development; removing the oxide film in the front exposed region by using a BOE corrosive liquid to expose the front N + isolation region to be diffused; step 4, taking POCl as a phosphorus source, and carrying out pre-deposition treatment in a diffusion furnace; step 5, N + isolation region phosphorus propulsion; step 6, etching a mesa structure; the performance attenuation rate is less than 10% after a high-temperature and high-humidity reliability test, and the protection requirements of low-voltage precision circuits of the Internet of Things, consumer electronics and the like are perfectly met.

The application discloses a supercapacitor-based power supply system and a car door handle, and relates to the field of automobile accessories. The supercapacitor-based power supply system comprises a battery, a transient voltage suppression diode, a voltage stabilizing circuit, a supercapacitor, a micro control unit, a driving circuit and a motor. The positive electrode of the battery is connected with the input end of the transient voltage suppression diode. The output end of the voltage stabilizing circuit is connected with the charging end of the supercapacitor and the power input end of the micro control unit. The discharging end of the supercapacitor is connected with the output end of the voltage stabilizing circuit, which is used for providing backup power for the micro control unit, the driving circuit and the motor when the battery is disconnected or the output voltage of the battery is lower than a preset value. The control signal output end of the micro control unit is connected with the input end of the driving circuit, and the output end of the driving circuit is connected with the motor. The micro control unit is configured to monitor the voltage and / or the electric quantity of the supercapacitor. The supercapacitor supplies power to the motor through the driving circuit, thereby improving the power supply stability.

A transient voltage suppression diode includes a substrate of a first conductivity type, a first well region of a second conductivity type disposed in the substrate, a first contact region of the first conductivity type disposed in the first well region and electrically coupled to an input, a second well region of the first conductivity type disposed in the substrate laterally separated from the first well region, a second contact region of the second conductivity type disposed in the second well region and electrically coupled to a ground, and an isolation region disposed in the substrate surrounding a side of the first well region.

The application provides a GPP unidirectional transient voltage suppression diode chip and a production method thereof, which comprises an N++ layer 4, a P+ layer 5 and a P++ layer 6; the upper surface of the P++ layer 6 comprises a planar part and an etching groove 1 arranged around the edge of the planar part; the P+ layer 5 is arranged on the upper side of the P++ layer 6, and the N++ layer 4 is arranged on the upper side of the P+ layer 5; the side surface of the N++ layer 4, the side surface of the P+ layer 5 and the etching groove 1 are provided with a passivation glass 2. The P+ substrate is adopted, the P+ substrate has better uniformity, the product VB is more uniform, and the transient voltage suppression diode characteristics are met. The inverted trapezoidal groove shape is adopted, the bird beak shape of the photoresist mask is avoided, the uniformity of the electrophoretic glass is improved, and the risk of sharp tip discharge is reduced.

The utility model discloses an anti-crosstalk circuit based on a multi-split high-low side combined drive relay. The anti-crosstalk circuit comprises a power supply, a high-drive module, at least two relays and at least two low-drive modules. A common diode is arranged between a second end of a high-drive switch and a grounding end, the second end of the high-drive switch is connected with a first end of a relay, and a second end of the relay is grounded through a transient voltage suppression diode and a low-drive switch which are connected in parallel in a corresponding low-drive module, so that when the high-drive switch is switched off, the low-drive switch is switched off; the low voltage drop characteristic of a common diode can be utilized to clamp the voltage at the two ends of the relay below the preset voltage, and the preset voltage is far less than the minimum starting voltage driven by each relay, so that the relays of other paths cannot be started; and the condition of mutual crosstalk among the relays after the high-drive switch is switched off when one high-drive module is combined with a plurality of low-drive modules to drive a plurality of relays is avoided.

The application relates to a large-current impact protection circuit of an online ground net corrosion monitoring device, and belongs to the technical field of ground net corrosion monitoring. The protection circuit is connected in series between a ground net conductor and a corrosion monitoring sensor, and comprises a four-stage cooperative protection circuit, a self-recovery protection unit and a control and detection unit. The four-stage cooperative protection circuit is sequentially composed of a gas discharge tube, a metal oxide varistor, a transient voltage suppression diode and a signal isolation unit composed of a direct-current isolation capacitor and a magnetic coupling transformer according to a signal flow direction, and is used for discharging and clamping large-current impacts in stages; the self-recovery protection unit comprises a PPTC self-recovery fuse and a magnetic latching relay connected in series. The application has the advantages that the device can withstand 100kA short-circuit current and 40kA lightning current impact without being damaged, can automatically recover the monitoring function after the impact, and is suitable for online ground net corrosion monitoring in a strong electromagnetic environment such as a transformer substation and a wind power plant.

The application belongs to the technical field of indirect lightning protection between cable ports of avionics, and particularly relates to an indirect lightning protection circuit and a device selection method thereof, wherein the indirect lightning protection circuit comprises: a gas discharge tube (GDT); a transient voltage suppression diode (TVS) connected in parallel with the GDT; and a pulse resistor (R) connected between a line in which the GDT and the TVS are located, for voltage division.

The invention belongs to the field of electricity meters, and particularly relates to a power supply module and an electricity meter, the power supply module comprises an input rectification filtering module, a voltage transformation module, a secondary rectification filtering module, a voltage sampling feedback module and a PWM control module, the voltage sampling feedback module is used for collecting feedback voltage output by the secondary rectification filtering module; the PWM control module can control the voltage transformation module to work according to a control signal output by the voltage sampling feedback module, so that the output voltage of the voltage transformation module is in a set range, and further the output voltage of the secondary rectification filtering module is in a set range; the transient voltage suppression diode is connected with the first node and an output pin of the PWM control module. According to the embodiment of the invention, the transient voltage suppression diode is adopted to absorb the peak generated by the primary leakage inductance, the circuit structures of the absorption loop and the power supply module are simplified, the energy loss is reduced, and the power consumption of the power supply module and the ammeter can be reduced.

This invention relates to the field of transient voltage suppressor diode (TVS) manufacturing technology and discloses a novel TVS mesa processing technology. This process aims to solve the problems of complex processes, high costs, significant safety and environmental risks, and poor product consistency caused by the reliance on photolithography and HF acid etching in existing technologies. This invention uses screen printing technology to directly and selectively coat glass paste onto a predetermined area of ​​the semiconductor substrate. After pre-drying and high-temperature sintering and curing, the patterning and passivation functions of the glass layer are realized simultaneously, eliminating key steps such as secondary coating, photolithography, HF etching, and resist removal in traditional processes. This process has advantages such as simplified process, low cost, safety and environmental protection, high forming accuracy, and stable product performance. It is suitable for the large-scale production of various TVS devices, especially for application scenarios with high requirements for production efficiency and reliability.

The utility model relates to the technical field of chairs and sofas for old people, and discloses a hand controller with a reset function for chairs and sofas for old people, which comprises an automatic reset control module; a driving module; a backlight module; a mobile phone charging module; a power supply inspection module; the integrated control module is used for sending control instructions to the automatic reset control module, the driving module, the backlight module and the mobile phone charging module; through the design of an automatic reset control module, after the old operate a hand controller to adjust the sofa to any state or angle, a reset key is pressed down, and an IC chip controls a driving part (such as a motor) to work, so that the sofa quickly and accurately returns to an initial preset position, the old can conveniently use the sofa next time, and manual adjustment for multiple times is not needed; and through the design of the transient voltage suppression diode, rapid conduction can be realized when the voltage abnormally rises, the over-high voltage is clamped to a safety range, internal elements of the hand controller are prevented from being damaged by the over-high voltage, and the service life of the hand controller is prolonged.

The invention discloses a test circuit and a test method for a transition voltage test, and relates to the field of automotive electronics, the test circuit comprises a first transient voltage suppression diode TVS1, a second transient voltage suppression diode TVS2, a first voltage division network, a second voltage division network, a first control assembly and a second control assembly; the first transient voltage suppression diode TVS1 is arranged between the VIN end and the S-GND end, the second transient voltage suppression diode TVS2 is arranged between the VIN end and the GND end, the first control assembly is arranged between the G-GND end and the GND end, the first voltage division network is arranged between the VIN end and the first control assembly, and the second voltage division network is arranged between the G-GND end and the GND end. The S-GND end and the first control assembly are electrically connected with the first voltage dividing network through the second control assembly, and the second voltage dividing network is arranged between the VIN end and the S-GND end and electrically connected with the second control assembly. According to the TVS diode, it is guaranteed that a transition voltage test can pass smoothly, and the problems that an existing D0-218AB packaged TVS diode is too high in cost and too large in space requirement are solved.

The invention discloses a forward and reverse laser photovoltaic micro inverter topological structure with a passive buffer circuit, and the structure comprises a solar photovoltaic panel, a decoupling capacitor, the passive buffer circuit, a forward and reverse excitation circuit, a transformer, and a full-bridge inverter circuit. The forward and flyback full-bridge inverter topological structure combines the advantages of a forward converter and a flyback converter, so that high power density can be realized, and high efficiency can be kept in a wide input voltage range. The invention provides a passive lossless buffer circuit. The transient voltage suppression diode is used as a basis for recovering and reusing leakage inductance energy, so that effective energy absorption is ensured, the voltage stress of a switching tube is reduced, and the working efficiency of the inverter is improved.

The application discloses a unidirectional transient suppression diode and a process. The diode comprises a substrate of a first conductive type, a first injection region and a second injection region of a second conductive type; the first injection region is arranged on the front surface of the substrate, and the second injection region is arranged on the back surface of the substrate; a pn junction formed between the second injection region and the substrate has a smaller junction depth than a pn junction formed between the first injection region and the substrate. A barrier layer and an insulating layer are sequentially arranged on the front surface of the substrate from bottom to top; the first injection region is led out by a first metal to form a first electrode; the insulating layer is arranged between the barrier layer and a first metal layer; the second injection region on the back surface and the substrate are led out by a second metal to form a second electrode, so that the second injection region on the back surface and the substrate are short-circuited; the first conductive type is different from the second conductive type; and the application improves the ability of negative surge.

A solid-state circuit breaker (SSCB) module includes a module housing comprising a heatsink and having a plurality of fins extending therefrom configured to dissipate heat; and a circuit breaker circuit comprising at least one semiconductor switch connected in parallel to at least one voltage clamping element, such as, for example, at least one transient voltage suppression (TVS) diode and / or at least one metal oxide varistor (MOV), the circuit breaker circuit being integrated inside the module housing.

The utility model provides an HPLC (High Performance Liquid Chromatography) medium-voltage carrier high-power signal differential amplification circuit, which relates to the technical field of amplification circuits and comprises a coupling transformer, a bridge sensor, an adjustment analysis module, an AD (Analog to Digital) acquisition circuit and an MCU (Microprogrammed Control Unit) module which are connected in sequence, a common-mode surge suppressor is connected in series between the coupling transformer and the bridge type sensor; the adjustment analysis module at least comprises a digital potentiometer and a differential amplification module, and the control end of the digital potentiometer is connected with the MCU module. According to the utility model, the common-mode surge suppressor is connected in series between the coupling transformer and the bridge type sensor, and the common-mode surge suppressor is formed by connecting the transient voltage suppression diode array and the common-mode choking coil in parallel, so that transient overvoltage active clamping of more than six kilovolts per microsecond is realized, the breakdown risk of a post-stage circuit is reduced, and the reliability of the circuit is improved. The problem that a conventional amplifying circuit is damaged due to power line coupling surge is solved.

The present description concerns a circuit of protection against overvoltages appearing during a protection against overcurrents comprising: a first diode and a second diode having their cathodes coupled to a first node; a first transient voltage suppressor diode having its cathode coupled to a second node and having its anode coupled to the anode of the first diode; a thyristor having its cathode coupled to the anode of the second diode, having its anode coupled to the second node, and having its gate coupled to the anode of the first diode; and a switch having a first terminal coupled to the first node.

The embodiment of the invention provides a nuclear electromagnetic pulse antenna feeder protector with a monitoring function. The nuclear electromagnetic pulse antenna feeder protector comprises a two-stage nuclear electromagnetic pulse protection module, a non-contact monitoring module and a main control processing module. The two-stage protection module adopts a cooperative structure of a front-stage gas discharge tube and a rear-stage transient voltage suppression diode, so that transient high-energy current induced by nuclear electromagnetic pulse is effectively discharged, and residual voltage is clamped; the non-contact monitoring module respectively induces magnetic fields generated by transient current of the output end and the input end of the radio frequency path and a grounding discharge path through three paths of non-contact current sensors, and the magnetic fields are converted into voltage signals representing input current, output current and discharge current through an integral conditioning circuit; and the main control processing module evaluates the protection performance of the nuclear electromagnetic pulse antenna feeder protector in real time based on the input current, the output current and the discharge current represented by the three paths of voltage signals, pre-estimates the service life of the device and realizes fault positioning.

The invention provides an integrated chip, a circuit and a lighting device, and belongs to the technical field of lighting. According to the integrated chip, an anti-surge component and a logic control circuit are arranged in the integrated chip, the anti-surge component comprises a transient voltage suppression diode, the positive electrode of the transient voltage suppression diode is connected with a current sampling pin, and the negative electrode of the transient voltage suppression diode is connected with a drain electrode pin, so that the integrated chip has an anti-surge function; a circuit or an electronic product using the integrated chip can bear voltage fluctuation. Moreover, since the anti-surge component is directly arranged inside the integrated chip and packaged together with the component inside the integrated chip, compared with the anti-surge component arranged outside the integrated chip, the size of a circuit or an electronic product is large; according to the highly integrated integrated chip provided by the invention, a circuit or an electronic product can have a relatively small size and a surge protection function.

In order to solve the problem of failure of an atomizing sheet caused by voltage spike impact and energy loss during dry burning in the prior art, the utility model provides an atomizing sheet dry burning protection circuit with hardware overvoltage clamping and software control functions, which is characterized in that transient voltage suppression diodes are connected in parallel at two ends of an MOS (Metal Oxide Semiconductor) tube or an atomizing sheet of an LC (Liquid Crystal) resonance circuit of a driving circuit; a cooperative protection mechanism of hardware clamping and software detection is formed by combining real-time current detection of the control unit, double suppression of overvoltage and overheating in the dry burning process is achieved, overvoltage and thermal damage borne by the atomization piece are effectively reduced, the dry burning tolerance of the atomization piece is remarkably improved, and the dry burning tolerance frequency of the atomization piece is increased from 50 times to 1000 times or above. The driving circuit can be suitable for separately-excited and self-excited atomizer driving circuits, can be used for medical, industrial and household atomizers, and has the advantages of simple circuit, low cost, strong compatibility and the like.

The utility model relates to an absorption circuit for a flyback switching power supply MOS tube and a multipath parallel flyback switching power supply with the absorption circuit, which are used for controlling voltage between a drain electrode and a source electrode of the MOS tube, and comprise a first flyback circuit, a second flyback circuit and an MOS tube absorption circuit, the output end of the MOS tube absorption circuit is connected with the power supply circuit; and the high-frequency capacitors C101 and C103 respectively form a loop with the primary side leakage inductance Lm of the transformer in the first flyback circuit and the second flyback circuit, so that the voltage amplitude generated by resonance of the leakage inductance Lm and the parasitic capacitance Coss of the MOS tube is reduced. Meanwhile, fast recovery diodes D102 and D104 are conducted, so that a high-frequency capacitor C102 absorbs voltage energy, a transient voltage suppression diode D101 performs voltage clamping, and terminal voltage of an MOS tube in the flyback circuit is controlled. The circuit is verified by an actual multi-path parallel flyback switching power supply, the work is stable and reliable, the stress control effect of the MOS tube is good, and the cost is relatively low.

The invention relates to a semiconductor protection switch (14) comprising a main switching unit (16) configured to switch off if a current flowing through the semiconductor protection switch (14) exceeds a maximum current threshold, and a clamping circuit (36) for energy absorption and overvoltage protection. The clamping circuit (36) is an active clamping circuit connected in parallel to the main switching unit (16). To improve the semiconductor protection switch (14) for use in an aircraft's DC network (48), the invention proposes that the clamping circuit (36) comprise a series connection of at least one TVS diode (30) and at least one low-voltage semiconductor switch (20). A low-voltage semiconductor switch (20) is a switch with a rated voltage (e.g., breakdown voltage) of less than 150 V DC.In particular, the low-voltage semiconductor switch has a nominal voltage of less than 150 V, preferably equal to or less than 100 V.