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Old 12-18-2019, 03:58 PM #1
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Blue sea switches: what’s the difference

Is there a difference in using a 300 amp M-series battery switch ($24 on amazon) vs a 100 amp 187 series circuit breaker switch ($52 on amazon)?

I see there’s a price difference but could I just use the M-series battery switch to disconnect my blue sea fuse box from the battery system in my 4Runner?

Thanks!
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Old 12-18-2019, 05:54 PM #2
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Why not use a relay? https://www.amazon.com/Stinger-SGP32...SBQKVHEJ6R15FF


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Old 12-19-2019, 12:51 PM #3
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Quote:
Originally Posted by thobry View Post
Is there a difference in using a 300 amp M-series battery switch ($24 on amazon) vs a 100 amp 187 series circuit breaker switch ($52 on amazon)?

I see there’s a price difference but could I just use the M-series battery switch to disconnect my blue sea fuse box from the battery system in my 4Runner?

Thanks!
Sure you could use a switch as a disconnect, but the purpose of the circuit breaker is that it will trip if any piece of downstream work shorts out. It will prevent fires or damage.

Why not use a Maxi-fuse holder right off the battery? They come in 60, 80, not sure if 100 also, maybe. That will be cheap and still protect. Or put the maxi-fuse before the switch if you still want the on/off feature.

People go for the breaker as it is the neatest solution.

Edit: after looking at the 2 products, there is also the size factor. The switches are kind of big and bulky for under hood work. The blue seas breaker is smaller and neater.
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Last edited by Kanoe; 12-19-2019 at 01:17 PM.
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