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How to identify zener diodes

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Markings on a circuit boardEdit

Any diode Specifically zener diode
D ZD
CR

ImagesEdit

Labeling on the diodeEdit

Part number labeled Value Labeled
Label Full part number

52
33
A

1N5233A

1N
47
51

1N4751
Label Voltage
6.2 6.2V
6•2 6.2V
47 47V

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