electrical question-40 amp circuit breaker

[outboardnut]

I would like to put a new circuit breaker on my CMC power tilt and trim unit.
The original circuit breaker is 24 VDC 40 amp and is hooked up to one 12 volt battery.
Can I use 12 volt 40 amp circuit breaker instead?
https://shop.advanceautoparts.com/p/cole-hersee-circuit-breaker-40-amp-12v-30055-40-bp/11044362-P?searchTerm=40+amp+circuit+breaker

[Bob Wight]

That 12V circuit breaker will be fine. I have that exact 12V 40amp breaker on the hydraulic jack plate on my 150 Evinrude.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20

“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."

• This reply was modified 5 years, 1 month ago by Bob Wight.

[frankr]

I guess bob’s experience says it is ok, but we don’t really have enough information. For instance, there is a difference in the load type to consider. An inductive load (motors) is a lot harder on switches than a resistive load (lights)

[Bob Wight]

Good point Frank. The entire circuit must be properly sized – switch, breaker and wiring.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20

“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."

[outboardnut]

this is what I ended up buying
https://www.ebay.com/itm/CIRCUIT-BREAKER-40-AMP-24-Volt-DC-SHORTSTOP-MANUAL-RESET-BUTTON-40A/283691379450?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

[Author]

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