TOMZN 250 AMP DC Breaker/Disconnect

Just a quick video with something I got in the mail today, its a TOMZN 250 AMP DC Breaker/Disconnect that I will be putting in our system. It did come from Ali Express so it was a pretty good deal. I won't quote a price since those seem to change hourly on Ali Express but it was about a third of what I have found for the same rating elsewhere.

[@tenzinchiodak4537]

Thanks for verifying the polarity on this thing. I recently received mine and had the same question. I was really unsure as the other MCCBs off Aliexpress don't have that cross. So ya, thanks a lot for this video!

[@med687]

Hello, I’m looking to buy this breaker, I’m just wondering if you have installed it and working well, I’m worried about the polarity, your help would be greatly appreciated, thank you for sharing your video.

[@daniloantonelli5196]

Just got one, exatly the same, from Aliexpress. I was unsure about the + / - notations and something wrong in the device. Good that it is normal.

[@Rando32]

This is a polarized breaker and has to be wired correctly. If not it can't extinguish the arc and catches on fire. That's what the + and - mean. This shouldn't be used with a hybrid inverter.