Large-size direct insertion type resistor capable of improving heat dissipation performance

Abstract

The invention discloses a large-size direct insertion type resistor capable of improving the heat dissipation performance. The large-size direct insertion type resistor comprises a ceramic substrate,a surface electrode, a back electrode, a resistor body, a primary protection layer, a secondary protection layer, an end electrode, a middle electrode, an outer electrode and a shell, wherein the ceramic substrate is a cylinder and is internally provided with a cavity; the resistor body covers the lower middle part of the ceramic substrate; the primary protection layer covers the surface of the resistor body; the secondary protection layer covers the surface of the primary protection layer; the end electrode is arranged at the bottom end of the ceramic substrate covered with the resistor body;the middle electrode covers the lower surface of the end electrode; the outer electrode covers the lower surface of the middle electrode; the end electrode, the middle electrode and the outer electrode are arranged at the upper end of the resistor body in sequence from bottom to top; a metal conductor is further connected with the outer electrode at the upper side. According to the large-size direct insertion type resistor disclosed by the invention, the structure of the ceramic substrate is changed so that a heat dissipation manner of the resistor body is improved, the heat dissipation capability of the resistor in a high-voltage industry is improved, and the anti-pulse capability of the resistor and the anti-voltage capability of the resistor are improved.

Description

technical field [0001] The invention relates to electronic devices, in particular to a large-size in-line resistor with improved heat dissipation performance. Background technique [0002] Resistors are generally directly referred to as resistances in daily life. It is a current-limiting element. After the resistor is connected to the circuit, the resistance value of the resistor is fixed. Generally, there are two pins, which can limit the current through the branch it is connected to. A resistor whose resistance value cannot be changed is called a fixed resistor. Those with variable resistance are called potentiometers or variable resistors. An ideal resistor is linear, that is, the instantaneous current through the resistor is proportional to the instantaneous applied voltage. Variable resistors for voltage division. On the exposed resistor body, one or two movable metal contacts are pressed tightly. The position of the contacts determines the resistance between eithe...

AI Technical Summary

Problems solved by technology

If the pulse time is slightly longer, the heat transfer rate and heat capacity of the substrate material also need to be considered, which will seriously affect the normal operation of the resistor

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