12V-110V DC Miniature Circuit Breaker, 125 Amp 1 Pole Battery Breaker Protector for Solar PV System and RV, Thermal Magnetic Trip, DIN Rail Mount, High Current DC Disconnect Switch MCB 1P B125

I have two battery banks associated with my solar power system. One consists of AGM batteries that maintains power to just a couple of appliances, including my fridge. The other consists of LifePo batteries that I use to power everything else. Each bank of batteries has its own inverter and I use one of these 125amp breakers between each bank of batteries and its inverter. 125amps is a little low for the size inverters Im running but I prefer it that way. I dont use more than 1500 watts at any one time and wouldnt want to. These would flip at around 1600-1650 watts. I also prefer these over fuses because these are much easier to reset.

DC circuit breaker for 12-110 volts DC. I use these on my solar storage batteries as a safety device. It’s easy to forget how much amperage these batteries have and how fast things can go wrong if a short circuit occurs. You can quickly burn your house down with unprotected high amperage wiring that turns red hot burning anything in its path. Do NOT chance it going without protection even with only 12 volts. It’s the high amperage you need to worry about.

Perfecto para mis baterías, funcionando muy bien

This replacement breaker operates cool as long as the stranded connection wires have ferril crimped terminals otherwise the stranded wires get loose and overheat.

Buena calidad y construcción

Work as they should

Excelente calidad precio

Idk.. I have the 125 amp breakers and they get burning hot when pushing them around 120 amps. I bumped current to 135 to see what they would do and they quickly got to the point where they could burn you within a few seconds. I didn't let it go long enough at that current because I thought it was going to start burning the breaker. Works good as a disconnect, and might even be ok if you have a gross over current doubling the amperage but I don't like how hot it gets without cutting out near its rated load. If I have an extra breaker at the end of my project maybe I'll do some more testing to see if it will burn up. Update* 12/2/25 I bought 6 or 7 of these things. 4 or 5 no longer work. So I did a high current test and pushed about 150a through a breaker. The 2 gauge wire stayed warm except for where it tied into the breaker. It got hot enough that it started to burn the 105c rated wire. I disconnected the system before fire but the breaker did not trip untill 30 minutes after the load was disconnected. A melted area occurred on the breaker and the wire was discolored. It hit roughly 260+ degrees before I shut it off and was climbing. So it failed my testing. Besides that A few tripped from normal use and no longer are able to reset. Another couple do reset but the contacts inside are bad. Honestly these things are a major liability and should be pulled from amazon. I pulled the remaining functioning breakers from my system because I no longer trust them to protect anything. Wish I could return.