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FJR Motorcycle Forums
Technical & Mechanical Problems
CM1a-D-12V Relays no longer available (fan, headlight, etc)
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<blockquote data-quote="harper" data-source="post: 1372347" data-attributes="member: 88451"><p>A snubber diode almost completely prevents the voltage across a relay coil from reversing polarity when the current in the coil is interrupted (when the relay is turned off). Using a diode doesn't require any additional current to keep the relay energized. A damping resistor in the same place reduces the amplitude of the voltage reversal of a relay coil when it is turned off, but does not generally eliminate it. This comes with the cost of an additional current that is required to keep the relay energized. More damping requires more excitation current because the resistor value is smaller.</p><p></p><p>Does that relay I mentioned look like an equivalent to you? It looks like the CM1A-D-12V is a sealed 1 form A relay with 35A peak current. The TE Connectivity part I gave you was 1 form C 30A peak. The high current option is more appropriate but it still doesn't look sealed to me. The 1 form A high current version is V23074-H2005-A502, same data sheet. Sorry for the confusion.</p></blockquote><p></p>
[QUOTE="harper, post: 1372347, member: 88451"] A snubber diode almost completely prevents the voltage across a relay coil from reversing polarity when the current in the coil is interrupted (when the relay is turned off). Using a diode doesn't require any additional current to keep the relay energized. A damping resistor in the same place reduces the amplitude of the voltage reversal of a relay coil when it is turned off, but does not generally eliminate it. This comes with the cost of an additional current that is required to keep the relay energized. More damping requires more excitation current because the resistor value is smaller. Does that relay I mentioned look like an equivalent to you? It looks like the CM1A-D-12V is a sealed 1 form A relay with 35A peak current. The TE Connectivity part I gave you was 1 form C 30A peak. The high current option is more appropriate but it still doesn't look sealed to me. The 1 form A high current version is V23074-H2005-A502, same data sheet. Sorry for the confusion. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
CM1a-D-12V Relays no longer available (fan, headlight, etc)
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