Description

ABB 5SHY5045L0020 AC10272001R0101

A rectifier diode is a semiconductor device that converts alternating current energy into direct current energy. It usually consists of a PN junction with two terminals, positive and negative. The rectifier diode is generally a planar silicon diode, which is used in various power supply rectifier circuits.

The role of the rectifier diode has a very obvious one-way conductivity, in the circuit, the current can only flow from the positive electrode of the diode, and the negative electrode can flow out. Generally speaking, the rectifier diode is a pn junction interface formed by the sintering of P-type semiconductor and N-type semiconductor. Here are the three functions of the rectifier diode:

First, prevent the effect of current backfilling

The most prominent role of the rectifier diode is its ability to prevent current backflow. When the rectifier diode is added with positive voltage, the positive voltage in the initial part of the positive voltage is very small, which can not effectively overcome the blocking effect of the electric field in the PN junction. When the positive current of the rectifier diode is almost zero, this part is called the dead zone, and the positive voltage that cannot guide the diode is called the dead zone voltage. When the positive voltage of the rectifier diode is greater than the dead voltage, the electric field in the PN junction is overcome effectively, and the positive current of the rectifier diode rises rapidly with the increase of voltage. Within the normal current range, the rectifier diode terminal voltage remains almost constant.

Second, play a role in protecting the circuit to prevent the wrong positive and negative terminals.

The rectifier diode can also play a protective role, when the rectifier diode applied reverse voltage does not exceed a certain range, the reverse current formed by a small number of carrier drift motion through the rectifier diode can prevent the wrong positive and negative terminals.

Third, reverse breakdown effect

Reverse breakdown in the action of rectifier diode, reverse breakdown according to the principle of mechanism is divided into Zener breakdown and avalanche breakdown two cases. Rectifier diode in the case of high doping concentration, the rectifier diode because the width of the barrier area is small, the reverse voltage is relatively large to destroy the covalent bond structure in the barrier area, so that the electrons are free from the covalent bond bondage, resulting in electron holes, another breakdown in the role of the rectifier diode is avalanche breakdown. When the reverse voltage of the rectifier diode is increased to a large value, the applied electric field will accelerate the electron drift speed, so that the valence electrons in the covalent bond of the rectifier diode will collide with each other, knock the valence electrons out of the covalent bond, and produce new electron hole pairs.

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One year warranty, special discount after sale

The company focuses on DCS, PLC, robot, large servo four systems

The main products are all kinds of module/card, controller, touch screen, servo drive

The company's advantages: the supply of imported original products, professional production of accessories

Fast delivery time, complete supply, The seller has more than $1526000 worth of industrial control products inventory

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Company: Guizhou Yuanmiao Automation Equipment Co., LTD

Address: Hongshan Hotel, No.42 Hongshan Lake Road, Beijie Street, Xixiu District, Anshun City, Guizhou Province (Bailing. No. 9, 14th floor, Doubletree by Hilton 

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② For shipment to countries outside Asia, please contact the seller.

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