Help required to select correct replacement Relay

[Grizzly bearParticipant @grizzlybear]

Hi CT,

Thanks for your reply.

Have you got a automotive relay to hand?

Your transistor is good for 0.5 amps.

Simple, to me is what works for you.

Involving the French, to me, is not a simple option. (They don't like us).

If you've got a good relay, go for it!

Good luck,

Bear..

[SillyOldDufferModerator @sillyoldduffer]

Posted by C T on 20/04/2020 17:18:04:

Posted by SillyOldDuffer on 20/04/2020 11:30:02:

Posted by Andy Carruthers on 20/04/2020 09:04:39:

…

I did find this relay on eBay: https://www.ebay.fr/itm/163857213519 Please check the pinouts and unfortunately I don't speak French but it *might* be the right part

I think this is certainly the right part. It has a matching part number. HR-AMR-Y/012 Z1

…

I know I have been guided away from choosing an automotive sized relay and fitting it outside the module but would it have WORKED?

Regards

CT

Possibly; a few things need to line up:

• 12V (OK)
• 130Ω coil, which is 90mA to suit the electronics. A lower resistance coil (as found on bigger relays) is likely to pop the transistors.
• The contact configuration (some combination of normally closed, normally open, which has to be got right, and could be probably rewired without much trouble.)
• The current capacity of the contacts. (Probably not critical, but too small and they weld together or burn out.)
• The relay's 'must operate' and 'must release' voltages (Unlikely to matter but might depending on the electronics.)

Had it been me, and the right relay not available, I'd certainly have tried an alternative assuming there was space for it and the wiring not completely unprofessional. (As cars vibrate cable terminations break and insulation chafes – badly done wiring can be a fire hazard.)

Hope the new relay works out – there are other things that might be wrong, but I think you've successfully isolated the relay as guilty. Well done, I lack the patience!

Dave

[Grizzly bearParticipant @grizzlybear]

Hi CT,

Thanks for your reply.

The transistor is good for 0.5 amps, it's only operating the relay coil.

If you have an automotive relay to hand, go for it.

Good luck,

Bear..

[Anonymous]

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