I expect them to kinda suck, so target usage in the 50% of rating or lower. I wouldn’t mind if they only lasted a year but lasting a few microseconds is a but hard to justify 
good thing they are cheap. I just can’t find anything more conventional or conservatively designed that works with higher voltage packs and my attempts at diy have not been productive. ¯_(ツ)_/¯
1 Like
I’ve got mine heat shrunk inside of an enclosure, I’m only running 2 bluetooth led controllers and 2 leds strips with 28 leds ea.
Poop, popped the 4th one. Not sure what im doing wrong here. Maybe it needs the io signal off before connecting power and can’t be wired always on? Load is a single 25mm fan running at 100ma. Didn’t think i was doing anything strange here but it doesn’t have power except when a charger is connected idk
Inline tvs diode? That worked for my buck converter
Have a part number for what you used? From my googling: I would place it in parallel to the input voltage and size it by its voltage breakdown (so 80v) in this use?
https://assets.nexperia.com/documents/data-sheet/NUP1301.pdf \
something like this or is there a better form factor or spec?
The one i used was like this and it went between the positive and negative input on the buck converter
Went with the p6ke91a. 77.8v clamping at 125v so it may work but the 125v clamping voltage makes me think it might not work. Everything that had 100v or less didn’t have a working voltage for 18s. Trial and error time
1 Like
Dude, you really need to wire them the way they are designed.
You need a 5v source to “enable” the circuit.
You admitted you were using full voltage to “enable” the circut.
That’s not what these are designed for.
I have close to 10 of these in different boards in the wild and have had zero failures.
I see no reason for you to keep complaining that these are failing, you keep wiring them wrong.
Wire one up properly and watch it work the way it’s supposed to.
1 Like
Can you see the part numbers on the main controller chip on the pcb? We can check if the enable pin can be toggled via the input voltage or if it needs to be logic level, typically 5V.
1 Like
When i get home this eve, I’ll look and see if it’s printed on the chip. On these photos, it really doesn’t help.
I must have misunderstood the label on this?
I figured input positive terminal meant the input positive terminal adjacent to this terminal but the output positive is also labeled input positive and i missed that. Ill set up the bread board and give it a go. But i am developing trust issues
Also i only did this on the 5v buck. I was going to use the 5v from the buck to switch the 12v on and off to turn the lights on and off so i could use a cheap small switch. Im nervous about ties between the esc 5v and this thing breaking my esc. When i had the 12v buck i tried to use the esc 5v to power it on and it died - i got hesitant and changed up my plan to use the 5v from the buck but all of the ones in my original order are dead. I have 2 more of the 12 and 5v to mess with but im not holding my breath. The tvss diodes just got here and im gonna just build everything without connecting anything to the esc for now