WEET - How to Detect the Quality of Diodes

Method for detecting the quality of diodes:


1. Detection of ordinary diodes: (including detector diodes, rectifier diodes, damping diodes, switching diodes, and freewheeling diodes) is a semiconductor device composed of a PN structure with unidirectional conductivity characteristics. By using a multimeter to detect its forward and reverse resistance values, the electrode of the diode can be identified, and it can also be estimated whether the diode is damaged.

https://weetcl.com/High_Speed_Switching_Diodes/


2. Detection of zener diode: Connect the positive terminal of the megohmmeter to the negative terminal of the zener diode, and connect the negative terminal of the megohmmeter to the positive terminal of the zener diode. Shake the handle of the megohmmeter at a constant speed according to regulations, and monitor the voltage values at both ends of the zener diode with a multimeter (the voltage range of the multimeter should depend on the size of the stable voltage value). When the voltage indication on the multimeter is stable, This voltage value is the stable voltage value of the zener diode. If the stable voltage value of the zener diode is measured to fluctuate, it indicates that the diode is unstable.

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MELF DO-213AB LL-34 SM4001 SM4007 MiniMELF LL-34 SOD-80 DO-213AA LL4148 LL4448 LLDB3 BZV55C2V4 ZMM75

SMD Diode Rectifier

MELF / DO-213AB / DL-41 / LL-41 LL-34, SM4001 Thru SM4007.

Mini-MELF / LL-34 / SOD-80 / DO-213AA, LL4148, LL4448, LLDB3, BZV55C2V4 Thru BZV55C75, ZMM1 Thru ZMM75.


MELF / DO-213AB / DL-41 / LL-41 TapeReel 5KPCS/REEL


GLASS PASSIVATED SILICON RECTIFIERS:

SM4001 Thru SM4007

Datasheet: http://www.weediode.com/zb_users/upload/2021/6/WEET_Melf_SM4001_THRU_SM4007.pdf 


Mini-MELF / LL-34 / SOD-80 / DO-213AA TapeReel 2.5KPCS/REEL


High Speed Switching Diode:

LL4148

Datasheet: http://www.weediode.com/zb_users/upload/2021/6/WEET_LL34_LL4148.pdf 

LL4448


Bi-directional Trigger Diode:

LLDB3,DB3


Silicon Planar zener Diodes:

BZV55C2V4 Thru BZV55C75

Datasheet: http://www.weediode.com/zb_users/upload/2021/6/WEET_LL34_BZV55C2V4_THRU_BZV55C75.pdf 

BZV55C2V4

BZV55C2V7

BZV55C3V0

BZV55C3V3

BZV55C3V6

BZV55C3V9

BZV55C4V3

BZV55C4V7

BZV55C5V1

BZV55C5V6

BZV55C6V2

BZV55C6V8

BZV55C7V5

BZV55C8V2

BZV55C9V1

BZV55C10V

BZV55C11V

BZV55C12V

BZV55C13V

BZV55C15V

BZV55C16V

BZV55C18V

BZV55C20V

BZV55C22V

BZV55C24V

BZV55C27V

BZV55C30V

BZV55C33V

BZV55C36V

BZV55C39V

BZV55C43V

BZV55C47V

BZV55B2V4

BZV55B2V7

BZV55B3V0

BZV55B3V3

BZV55B3V6

BZV55B3V9

BZV55B4V3

BZV55B4V7

BZV55B5V1

BZV55B5V6

BZV55B6V2

BZV55B6V8

BZV55B7V5

BZV55B8V2

BZV55B9V1

BZV55B10V

BZV55B11V

BZV55B12V

BZV55B13V

BZV55B15V

BZV55B16V

BZV55B18V

BZV55B20V

BZV55B22V

BZV55B24V

BZV55B27V

BZV55B30V

BZV55B33V

BZV55B36V

BZV55B39V

BZV55B43V

BZV55B47V


Silicon Planar zener Diodes:

ZMM1 Thru ZMM75

Datasheet: http://www.weediode.com/zb_users/upload/2021/6/WEET_LL34_ZMM1_THRU_ZMM75.pdf 

ZMM2V4

ZMM2V7

ZMM3V0

ZMM3V3

ZMM3V6

ZMM3V9

ZMM4V3

ZMM4V7

ZMM5V1

ZMM5V6

ZMM6V2

ZMM6V8

ZMM7V5

ZMM8V2

ZMM9V1

ZMM10V

ZMM11V

ZMM12V

ZMM13V

ZMM15V

ZMM16V

ZMM18V

ZMM20V

ZMM22V

ZMM24V

ZMM27V

ZMM30V

ZMM33V

ZMM36V

ZMM39V

ZMM43V

ZMM47V

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WEE Technology Company Limited

Datasheets: http://www.weediode.com/DATASHEETS.html 

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