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Automotive relay question
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Maynard A. Philbrook Jr.
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Automotive relay question
In article ,
says...
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
Also, it could be a bidirectional TVS diode, those will clamp
either polarity when ever the voltage exceeds the coil rating.
Jamie
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