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Miscellaneous Automotive
Car Electronics & Appearance
Question about automotive relays?
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<blockquote data-quote="Prowler573" data-source="post: 1690691" data-attributes="member: 561023"><p>A SPST relay doesn't need the trigger voltage to carry anywhere near 30 amperes. It doesn't need to have any stronger feed than an amp's remote turn-on input needs. But other than that the relay will need its own source of 12v+ and ground.</p><p></p><p>You then have the input which acts as a trigger for the relay to complete the circuit on whatever it is powering.</p><p></p><p>Then last is the output to give current to whatever is powered by the relay.</p><p></p><p>You can fuse the power input to the relay if you wish but it's a bit of overkill. The relay itself will have an amperage rating which if exceeded, will fry the relay. So in essence it acts as its own fuse.</p></blockquote><p></p>
[QUOTE="Prowler573, post: 1690691, member: 561023"] A SPST relay doesn't need the trigger voltage to carry anywhere near 30 amperes. It doesn't need to have any stronger feed than an amp's remote turn-on input needs. But other than that the relay will need its own source of 12v+ and ground. You then have the input which acts as a trigger for the relay to complete the circuit on whatever it is powering. Then last is the output to give current to whatever is powered by the relay. You can fuse the power input to the relay if you wish but it's a bit of overkill. The relay itself will have an amperage rating which if exceeded, will fry the relay. So in essence it acts as its own fuse. [/QUOTE]
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Question about automotive relays?
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