Starter solenoid. - 460 Ford Forum
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post #1 of 10 (permalink) Old 06-12-2009, 05:07 PM Thread Starter
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Starter solenoid.

I know they are not rated for continuous duty, but will I be okay with a small load (3-5amps)? I'm thinking about running a separate solenoid as a switched leg. Any idea what's the max amount of amps I could get away with? If any?
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post #2 of 10 (permalink) Old 06-12-2009, 05:36 PM
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It's not the amps across the switched legs that limit the duty cycle of a starter solenoid, it's the heat buildup in the pull-in coil that is the problem.

So, just energizing a starter solenoid for more than a few minutes would toast it, regardless of the load.

The good news is that there are 30-40 amp relays available for less than 10 bucks.

Greg

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post #3 of 10 (permalink) Old 06-12-2009, 05:48 PM
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Quote:
Originally Posted by Greg_P View Post
It's not the amps across the switched legs that limit the duty cycle of a starter solenoid, it's the heat buildup in the pull-in coil that is the problem.

So, just energizing a starter solenoid for more than a few minutes would toast it, regardless of the load.

The good news is that there are 30-40 amp relays available for less than 10 bucks.

Greg
Solenoid's are limited by current on the contacts but its true the coil will burn out with continuous duty.

you can get continuous duty solenoid's if you choose or as stated you can just use a relay, make sure you know which is the N/O contacts and which is the N/C, and Coil. That could screw a guy up, as sometimes they're hard to read on certain relays. also make sure you grab the right coil voltage...12V i assume in your case.. sometimes they're 24V or 120V depending on where you get them.

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post #4 of 10 (permalink) Old 06-12-2009, 10:10 PM
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Many electric golf carts use "continuous duty" solenoids.

Some people can break a cannon ball, in a sand box, with their bare hands.
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post #5 of 10 (permalink) Old 06-15-2009, 09:39 AM Thread Starter
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Anyone have a part number for a relay I Can pick up at autozone or the like.
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post #6 of 10 (permalink) Old 06-15-2009, 03:15 PM
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These are what I use...
http://www.oreillyauto.com/EW3/Displ...ycleCount=1672

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Last edited by Treeyasoon; 08-03-2009 at 04:55 PM.
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post #7 of 10 (permalink) Old 06-15-2009, 04:19 PM Thread Starter
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Sounds good.
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post #8 of 10 (permalink) Old 08-02-2009, 12:38 AM
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i clicked the link that ws posted. and all igot was a headlight plug....
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post #9 of 10 (permalink) Old 08-02-2009, 11:28 PM
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Just go in and ask for a 30 amp Bosch relay. The are about 2 inches square and have 5 terminals on them. If you can find a counter person that will look, have them get you a 5 prong connector for it also, or you can just use ind spade connectors.
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post #10 of 10 (permalink) Old 08-03-2009, 04:58 PM
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I edited the link...they must have changed something in the system since I posted the last one.
It is item #84601. Hope this helps.-Jeff

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