DIN rail surge suppressor with dodgy safety mechanism.

also, wire brush on a bench grinder is the best tool for unpotting.

no, I see a square tab, soldered at both ends. I would argue it is the square tab that heats up and desolders itself leaving a 20mm gap. I think it needs a retest with some high current, possibly from a lead-acid or five.

Yeah, I'd call that a fair test. One thing I noticed is that, to me, there is WAY too much solder on that connection point. A smaller contact point would leave less solder to "trail" that arm up when it moves. Would be interesting to see one of those overloaded to find out if it would work or not. Something is definitely wrong with the design, however, and I wouldn't trust it.

I've ordered a couple, including a clear one. They tend to be based on very standard chips inside. It's trickier getting a 10mA one as I think the standard in China is 30mA as it is here.

Big Clive

hey clive, industrial stuff is always interesting! I'd love to see a video on a cheap RCD, the same seller sells those for under 10$. Would be cool if you could somehow measure how long it takes them to brake the circuit and disconnect (if they even do what they were supposed to). I'm still thinking about installing a 10mA RCD in my room, just for safety. The genuine ones are very expensive tho!

What a coincidence that this video was just released, the day after the surge protector in my house blew again. It's about five years since last time, and then it was five years since we had it installed. I just learned about these holder-and-insert-type surge protectors, and that is definately what will go in my consumer unit this time. I can confirm the slot/peg is for indication/warning when something is wrong. In my box there is even an audible alarm hooked up to it.

If the link was shorter instead of passing through the lower terminal the break would be safer, but I agree that the spring is too long or the peg should be higher.

It's almost as if the spring is too long.

I wonder if the plastic is flame-retardant. That thing going on fire in your consumer unit would make for a bad day.

This was painful to watch. Be careful Clive! :D