Blue Sea Systems7146 187-Series Circuit Breaker, Surface Mount, 120A

I use these types of breakers for my solar projects. They come in varying sizes. It allows you to manually open and close the circuit at will without having to move wires. I use these before and after each solar charge controller. This comes in handy for maintenance, trouble shooting a system, or just turning off a portion of the system. They do trip at lower than the rating when the environment gets warmer and that is part of the design. For example, my 70 amp version that normally works fine tripped at 60.5 amps when the temp around the system was over 110F. Ideally you dont want to have the system exposed to temps in that range anyway. After exhausting the heat the breaker worked as usual again.

I bought the 150A version. I ran the same test I did on the less expensive brands of these breakers. The other brands would trip around 80A to 90A (sometimes even less). This brand, I was able to run at 120A for about 45 minutes before I had to reduce the current because my test equipment was getting too hot. These actually appear to work at their rated current. Don't waste your money on the less expensive brands, get these if you are looking for breakers that actually meet their specifications. Also, the measured on resistance was about 0.0005 Ohms. Much better than other brands that I tested. Very nice pads around the studs for very low contact resistance.

Breakers are important. Completely ignored once installed, they labor in anonymity while saving your wiring and devices from failing and thus putting your life in danger. There are so many junk breakers out there now, made with sketchy materials and shoddy workmanship. If you’re lucky, they trip early and are a constant nuisance. If you’re unlucky they don’t trip at all and your gear, and maybe you, get burned. It isn’t worth it... pay for quality and sleep peacefully. It sure beats cheaping out, and “resting in peace.”

Though these are a bit expensive, they are well made. I use these in a dual capacity role in my RV. They work as fuses as well as circuit disconnect devices. In an RV where space is limited, that can be important.

I got the cheaper versions of these breaker, and they would trip if I looked at them cross-eyed. These haven't tripped yet- all wiring to spec. Spend the extra money and get Blue Sea. They are now in all places in my RV- solar and lithium battery connections.

This is very good quality 60 amp circuit breaker that's a very good replacement for the Minn Kota circuit breaker they recommended for my Endura MAX 55 lb thrust model. This circuit breaker has a manual trip button that can be used as a cut off switch and Minn Kota's does not have one. This circuit breaker is not flimsy and the base does not break when you tighten the screws down that you use to mount it with.

Perfect for my new battery install on my trolling motor

I bought this for my winch on my jeep wrangler. I looked at several before purchasing this one. After reviewing the options out there this was the obvious choice. Unlike the Chinese made units this one is UL certified. Construction is very solid and robust. Looks like it was made for my jeep. Like I said it's the only UL certified unit I could find. Well worth the money.

This circuit breaker worked for my marine application as a combined Isolator and Circuit protection device for my Bowthruster , the device is smaller than anticipated .

Bought a $ 21 200amp unit which tripped at less then 20amps on a 2200 watt inverter setup in my RV. I should have seen the light as my solar stuff had Blue Sea equipment right from Artic Fox (battery shutoff and 30amp fuse block). The quality of construction, weight and operation of this breaker will not let you down. Passed all of my tests/loads with ease, unlike the cheap job. Will not ever make this mistake again. Blue Sea is the way to go!

Product arrived on time. Installation was straight forward and so far it runs well. Will update this review once fully tested on max amps. But so far, quality is solid.December 24, 2020 Update:After 3 months of use. The system still runs perfectly well and stable. Always buy good quality circuit breaker like Blue Sea Systems. Don't buy cheap knock offs.

I surface mounted this to the battery box for the house side of the motorhome. Allows easily accessible disconnection while keeping all the cables hidden inside the box. Bluesea makes great products. I will definitely be purchasing more of their stuff in the future.

I have bought other breakers for my van build. You sure can tell the difference. This one is super high quality which you want considering the job it has to do. I am now going to replace my others with Blue Sea