Blue Sea Systems 7148 187-Series Circuit Breaker, Surface Mount, 150A

Easy to install, easy to break or reset the circuit. Decent terminals for connecting a 10mm² wire

Another great blue sea product. Great quality and clean look. I used this on a dual battery system overland build.

same breakers contender uses, so i only use these.

I've used them many times without any failures on my snow/ice removal trucks and brine equipment.

Provides reliable protection for my DC to DC converter.

First of all I purchased the 187series 200amp version and connected it to the positive terminals on my 200Ah LifePo4 battery. Tested it with a heavy load of 210amps. It didn't trip or showed any signs of tripping . At least I can shut down the battery easily.I then decided to spend another $100 on a 150Amp version. This time I connected it between my 2500watt inverter and the battery - making sure I connected the line to the line and the load to the load.Again tested it by plugging in my1100watt kettle and turning on the microwave at the same time. I wanted to simulate a situation whereby I might do this accidentally. I dont want to draw that much power (210amps) from my Battery at the one time.Again the 150amp didn't trip or no sign of it to trip.I had previously increased the cable size on the inverter from 16mm2 (pair) to 35mm2 because the 16mm2 was getting uncomfortably hot..I decided to put the original cables back in againTested once again with the same load.STILL NO TRIP. Although the cables were worryingly hot.Now it only serves as an on/off switch.I am no EE. At this stage I reckon the the cabling would be in a sorry state when these Circuit breakers trip.Perhaps I am doing something wrong.The Breakers seem very robust.I tried to do the responsible thing by fitting circuit breakers and good high amperage cable.Now it looks like I will have to go back to a Plain Old blade Fuse.

Original and that says it all! Highly recommended!

It’s Blue Sea. You can’t go wrong. Just get the right size.