Circuit Breaker Switch 20A Waterproof Fuse Inline Holder 3-15 AWG Resettable Fuse Manual Reset 12V-48V DC for Car Audio Sound Amplifier System RV Home Marine Boat Truck
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Availability:
15 left in stock
Arrives
Tuesday, Aug 12
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Color: 20A-with accessories
Size: 20A-with accessories
Features
- [Special tips]Ideal for car audio and video systems, boats, trucks, buses, RV's, ATV, marine and DC sound amplifier system overload protection.[Size]20A,3.9in (L) x 1.65in (W) x 1.57in (H) Red manual reset button,with 2 install screws in package. compatible with all 12V-48VDC Systems.
- [Safe and Conveniency]Type 3 manual resettable make sure to protect your appliance in an over-current or short circuit condition.A red button can serve as a master disconnect.we also provided with two screws to help you install.
- [Widely Application]High amp circuit breakers are used as the main power protection for all circuits coming off your battery.
- [Optimal Design]High amperage circuit breakers provides current protection in a compact package,Good Conductivity, Temperature And Pressure Resistance,Splash and dust proof.
- [High Quality]Manufactured by M1A2, these circuit breakers set the standard in high power DC circuit protection.They conform to SAE J162S; SAE J1171 (ignition protected) standard.
Brand: M1A2
Current Rating: 20 Amps
Circuit Breaker Type: Standard
Mounting Type: Screw Mount
Number Of Poles: 1
Brand: M1A2
Current Rating: 20 Amps
Circuit Breaker Type: Standard
Mounting Type: Screw Mount
Number Of Poles: 1
UPC: 610452230513
Manufacturer: M1A2
Item Weight: 3.84 ounces
Product Dimensions: 3.9 x 1.65 x 1.57 inches
Item model number: MCB61020AACC
Manufacturer Part Number: MCB61020AACC
Voltage: 48 Volts
Date First Available: January 31, 2021
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Aug 12
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: 20A-with accessories
Size: 20A-with accessories
I use them for a Solar charger on the input and output. They work well and allow me cut power if I need to make changes. I have yet to have one trip so I can handle the power I'm using. Easy to install, easy to cut power and reset, handles 15v and close to 20 amps
Reviewed in the United States on April 21, 2025 by Ken K.
Color: 15A-with accessories
Size: 15A-with accessories
Great quality plastic rubber and switch mechanism. Easy-to-use and secure for all applications.
Reviewed in the United States on April 30, 2025 by Jerry
Color: 40A-with accessories
Size: 40A-with accessories
This is exactly what I was looking for my dc-2-dc charging system where wiring was getting warmer before going in the charge controller. Putting this before the entry point with the same awg wiring as the charge controller, this works perfectly. It also has an ON/OFF switch which gives me power to control manually as well. I am going to use it in addition (side by side) with my solar charger in the Van at times when sky is overcast with no sun.
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Reviewed in the United States on April 7, 2025 by TheStoneHouse
Color: 15A-with accessories
Size: 15A-with accessories
Didn't last for more than a day. I'm raising this to 4 stars because I really like the design, and the seller offered a full refund. I'd be willing to try the product again in the future to see what it can handle.
Reviewed in the United States on April 28, 2024 by Amazon Customer Amazon Customer
Color: 60A-with accessories
Size: 60A-with accessories
Did not straight out the box. I connected to a trolling motor power would not go through it. It had power from battery but no power to outgoing side. Would not reset. Extremely disappointed with item.
Reviewed in the United States on April 9, 2025 by Dennis Payne
Color: 80A-with accessories
Size: 80A-with accessories
I used an M1A2 80 amp for an in-line breaker to my cabin battery in my camper for safety and as a disconnect. It worked well for this application. I recently connected the engine battery to the cabin battery through an Automatic Charge Relay (ACR) using the same breaker. When I tested it, the alternator was charging right around 40 amps tested with my DC ammeter. It tripped quickly. After letting it cool and resetting it, the breaker repeatedly tripped over and over again around 40A. The same current, of course, was going through the same breaker at the cabin battery which performed as it should. I used the AC charger and charged the cabin battery up considerably and tried it again. Now it was charging around 20 amps and it performed as it should and did not trip. My conclusion is that my new breaker for the engine battery was marked 80A but performing as a normal 40A breaker. This would suggest a quality control manufacturing issue. This might explain the frequent complaints of the device repeatedly tripping at lower than marked amperage. The supplier read this review and quickly sent me a refund. I purchased the another one of the same brand from a different supplier on Amazon hoping it would come from a different batch. Exactly the same problem and tripped repeatedly at 40 A. I would not buy any more of these, 2 strikes and you are out. I ordered a different breaker from a different manufacturer.
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Reviewed in the United States on September 24, 2024 by Mark Monson
Color: 30A-with accessories
Size: 30A-with accessories
As you can see I have a Franken-cycle. I needed some kind of switch to isolate the two batteries. It's not that sanitary but it totally works.
Reviewed in the United States on May 9, 2025 by Waterickson Waterickson
Color: 15A-with accessories
Size: 15A-with accessories
I used this with a medium-size 12 volt refrigerator I installed in my motorhome. Why use a fuse when you can use a circuit breaker, right? There's screws on each side made to connect the wire, of which my 12 gauge wire worked fine (could go a lot bigger if needed), and then I mounted the breaker on a wall in the battery compartment. The breaker can also work as an on-off switch if needed.
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Reviewed in the United States on July 15, 2024 by Bart