RELAY QUESTION

[injunbill]

[resident_genius]

[onlineatvsalvage]

[injunbill]

[a3holerman]

[SeaMonkey]

The starter relay is very rugged and built to handle current surges up to 300 Amperes, and sustained currents in excess of 100 Amperes.

The electrical contacts are extremely heavy and capable of handling smaller currents in the electrolyzer range with ease.

They'd be an excellent choice for this application if their coil resistance wasn't so low. It is typically 4 ohms so it draws quite a lot of current (about 3 amperes) and dissipates about 36 watts. In time it would become very hot and possibly damaged.

A3holerman is correct, the automotive 30 ampere relay is a better choice as it only draws about 160 milliamperes of coil current and will tolerate continuous energizing for many, many hours.

All Electronics carries them for $2.40

[injunbill]

In time it would become very hot and possibly damaged

and smpke and fire...just tried the ford 150 relay..worked great for 15 minutes...soooooo I am now ordering from all electronics..nice site...Thanks so much

[Dngspot]

No a starter solenoid will not work. I fried two of those guys before I used relay from work. They can handle the 30 amps but the coil gets hot and it will either stick closed or not close on the next cycle.
The relay I am using can be found at a Cat dealer. They are used in a 416C Backhoe Loader. I think they retail for about $7.00. If needed I can supply the part number.

[Ioku]

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