02
2020
07

SPS SMD Diode Rectifiers Identification and Discrimination

Special Sun A·H·M Technology(Shanghai)Co.,Ltd.
SPS - ISO Factory for SMD and Through-hole Diodes and Rectifiers Since 2000


SPS SMD Diode Rectifiers Identification and Discrimination:


1. Model marking and polar braid


The types of SMD diodes are marked with letters, numeric codes or letters + numeric codes and color (code) identification methods. For example, the electrical parameters of the printing "A3" are as follows: PD =0.15W; IF=0.1A; VB= 80V; Trr=4ns. In the color marking method, the model is mainly found by the color marked on the negative side, and then the parameter value is found by the model.


SMD diode polarity discrimination method: glass tube SMD diode, red end is positive, black end is negative; rectangular SMD diode, with white horizontal line end is negative.


2. Good or bad measurement


Normal SMD diode, measured in the road, the forward resistance is small, the reverse resistance is large, and there is a significant difference in resistance between the two. Disconnect the circuit, if measured with a pointer multimeter, the forward resistance is about 3kΩ, and the reverse resistance is hundreds of kiloohms or infinity; if measured with the diode block of the digital multimeter, the forward voltage drops to 0.3 ~ 0.6V, reverse The voltage drop is infinite.


3. Online braid


On the circuit board, the component number of the chip diode generally starts with the letter D, such as D1, D2, etc., or VD, such as VD1, VD2, etc.; or DD, such as DD1, DD2, etc. To distinguish between chip resistors or capacitors with similar shapes, you can use a multimeter to measure them. If their forward and reverse resistance values are different, you can determine that the component is a chip diode.


SPS Tape Reel SMD Diodes and Rectifiers Popular Products and Datasheets List: 


SPS 1A 50V-100V SMD Diodes F1 F2 F3 F4 F5 F6 F7 SOD-123FL Package F1-THRU-F7

https://spssemi.com/pdf/SPS-F1-THRU-F7.pdf 

SPS 5A 20V-100V SKY SMD Diodes SS52 SS54 SS56 SS58 SS510 SMC Package SS52-THRU-SS520

https://spssemi.com/pdf/SPS-SS52-THRU-SS520.pdf 

SPS DL52 ZMM52 SERIES ZENER DIODES MINI MELF Package ZMM52 SERIES

https://spssemi.com/pdf/SPS-ZMM52-ZENER-DIODES.pdf 

SPS 1A 50V-1000V SMD Diodes M1 M2 M3 M4 M5 M6 M7 SMA-J Package

https://spssemi.com/pdf/SPS-M1-THRU-M7.pdf

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