Thread: Automotive relay question
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Maynard A. Philbrook Jr. Maynard A. Philbrook Jr. is offline
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Default Automotive relay question
In article ,
says...

On 17.10.14 15:38, DaveC wrote:
I have a 12V SPST cube relay in my junque box. The diagram molded into the
relayıs housing includes a component connected in parallel with the coil
which looks suspiciously like a resistor.

Itıs not a back-emf diode: I connected the relay coil using both polarities
(using a current-limited power supply) and the same current draw is measured.


What is the purpose of this resistor?

Thanks,
Dave




Congratulations.
You found the perfect way of killing a protection diode.
After this the diode will bother you no more.
Dont touch my car please.

Not really, could be a bidirectional TVS of sorts.

Jamie

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