DC Miniature Circuit Breaker, 2 Pole 500V 32 Amp Isolator for Solar PV System, Thermal Magnetic Trip, DIN Rail Mount, Chtaixi DC Disconnect Switch C32

I bought these for the primary reason to be able to isolate my solar panels from my system. Turn them on/off. The mini breaker does that fine. Will they trip in a fault? I have no idea since I haven't had a fault yet. I've bought several to cover my panel strings. So far so good.

As another reviewer pointed out, the compression terminals don't hold a #10 stranded wire securely. No matter how hard you tighten the screws, the wires still pop out. I made it work by crimping a spade lug onto the wire, then mashing the lug with pliers enough to fit into the socket. A ring tongue terminal would also work.I also used a couple of extra screws into the DIN rail, on either side of the breaker, protruding enough to keep the breaker from sliding. If I need to remove the breaker I can just remove one of these screws and slide it off the end.

Excellent

So the screw terminals have some mild laser etched pattern with no real bite to retain wire. While using 10awg THHN, I’d torque the retention screw as far as possible (why use a Phillips, I don’t know. So many better options) to the point that the unit is flexing and the plastic shell wants to separate. Only to find when mounting the unit, the cable will fall out. After some testing, I found that if you “crimped” the wire a bit by using pliers to pre-flatten the cable before inserting and screwing the retention screw, it performed reasonably well at retaining the wire. I will buy again as the price is right, but I’ll also keep a spare on hand.

I got one of these double pole breakers to disconnect the solar panels from the controller and to protect the whole system. Although I doubt two 100 watt solar panels could cause the breakers to trip, the protection is there if something does go wrong. The DIN mounting system is excellent: just screw the plate where you want it and the breaker snaps in place. The two poles means one can disconnect both positive and negative leads with one ganged switch. I mounted mine in a enclosed location and I just lift a cover if I need to disconnect the panels. Controller manufacturers recommend disconnecting the solar panels before disconnecting the battery connection to the controller, so something like these breakers are needed to do that.

The product itself is fine. The screw terminals won't tighten around the wires. Using 8 guage stranded wire. The terminals don't want to stay tight.

This little breaker is awesome, works great and is a needed item. easy to install and works what else do you need.

these work very well for solar. but when buying these make sure you order some longer din rails to mount them on. I have ordered 9 of these they are very nice the only reason I didn't give 5 stars is how short the din rails are.

Relación precio - servicio que brinda, es excelente.