Protective device and method for transistor pins on heat sink

Abstract

The invention discloses a protection device and method for the pins of transistors on a radiator. The device comprises one or a plurality of transistors fixed on the radiator; each pin of each transistor is sleeved with an insulating sleeve; the top end of the insulating sleeve reaches the top of the pin and contacts with a transistor body; a gap is left between the top end of the insulating sleeve and the transistor body; a gap is defined by the inner wall of the insulating sleeve and the outer wall of the pin; the pins of the transistors and the base pins of the radiator are plugged into a circuit board, and are welded through soldering from the bottoms of the pins of the transistors and the base pins of the radiator; after welding, the bottom end of the insulating sleeve contacts with the surface of the circuit board, a gap being left between the bottom end of the insulating sleeve and the surface of the circuit board; three-proofing paint is applied to the gap between the insulating sleeve and the surface of the circuit board through a coating valve; and the three-proofing paint climbs to the top of the pin of the transistor along the gap between the pin and the insulating sleeve, and fills the gap between the pin of the transistor and the insulating sleeve and the gap between the insulating sleeve and the transistor body. With the protection device and method of the invention adopted, the pins of the transistors can be protected comprehensively.

Description

Technical field [0001] The invention relates to the field of electronics, in particular to a transistor pin protection device on a radiator and a method thereof. Background technique [0002] In the electronics industry, especially wind energy products, solar photovoltaic products, power products and other industries, when transistors on circuit boards are working, they will encounter various pollutants generated by the environment, such as moisture, dust, corrosive gases, salt spray, Oil pollution, etc., these pollutants will corrode or short circuit the transistor pins, which will make the transistor function invalid, especially if multiple transistors are fixed on the radiator, and multiple radiators are arranged together. When the radiators are dense, heat dissipation There are more and more cases of corrosion or short-circuit of the transistors between the devices because they cannot be effectively protected. At present, the circuit board industry does not have better protec...

AI Technical Summary

Problems solved by technology

[0002] In the electronics industry, especially wind energy products, solar photovoltaic products, power supply products and other industries, when the transistors on the circuit board are working, they will encounter various pollutants generated by the environment, such as moisture, dust, corrosive gases, salt spray, Oil stains, etc. These pollutants will cause corrosion or short circuit to the transistor pins, thereby making the transistor function invalid, especially when multiple transistors are fixed on the heat sink, and multiple heat sinks are arranged together. There are more and more cases of corrosion or short-circuiting of transistors between devices because they cannot be effectively protected. At present, the circuit board industry does not have good protection measures for transistor pins

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