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Reversed diode for relay coils

Reversed diode for relay coils

16.Jan 2015
| Blog

 

Reversed diode for relay coils

Do not forget about the reversed diode (aka anti-parallel diode) to be connected in parallel to the relay coils when switching by transistors. Without the diode the voltage surge will burn the output transistor.

Some products that have transistor based outputs and need the diode protection:

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