Nor do "users screw you" to leave themselves stranded - they screw themselves, which is unlikely and, if they do, they deserve to die anyway.
Yea... It doesn't sound like you've ever been the guy answering the tech support line
It sounds like you are putting 12, 30A relays in parallel for a motor disconnect on on an electric motorbike. Yes or no?
No, the relays will not be in parallel at all, at least, they aren't supposed to be! I have a micro controlled box that will act like a smart high side driver array, I'm not certain where it will wind up. Fleet vehicles mainly I bet, maybe some consumer, could find it's way into bikes and other places, I'm not sure. Basically, I don't know what the user is going to do, so I'm looking for "fool-proof" options.
That is a good starting point, thanks. But I'm thinking solid state might not work. After looking them up from this link and my own googling, I can't find something that isn't in an industrial package screw terminal or specialized socket. These are far too large, and expensive. I'm actually leaning towards 30A automotive relays because if one ever does burn out they can be replaced in a socket easily. The user may also appreciate the familiarity, and ability to determine when they are being triggered by sight/sound for diagnostics. It sort of doesn't seem like solid state relays are there yet.
The idea is that my relay array is to the PCB if possible (if I can make robust enough traces). I can't have wires flailing around this thing, the idea was to provide a nice waterproof harness that the user pinned out as needed. The initial plan was to support the 12 relays, drivers, micro, in a 9"x5" or so package.
I suppose 30A mechanical relays are fine, but I still need a smaller solid relay or transistor setup to drive those, and that'll need to be rugged as well. Like I said, I'm definitely outside of my wheelhouse here.
But any other comments or recommendations would be super helpful!
edit: Ok, I found one SSR that might work for size and constraints, but it's entirely a gamble, I'd really have to abuse them in testing to consider them reliable. http://www.songle.com/pdf/20085271539341001.pdf
But, it does have a 5v "coil" and 30A in a PCB appropriate package.