Siemens 12V 40A Automotive Relay – CB1-R-12V, 1xUM, 1x 20-54/7

Need a reliable relay for your automotive project?

This is a Siemens 12V relay rated at 40 amps.

It's the CB1-R-12V model, sometimes marked 20-54/7.

Single pole, standard ISO footprint.

Brand new old stock or new old stock?

Either way, it's a solid German-made relay for powering lights, fans, horns, or whatever else you're wiring up.

Always good to have a spare Siemens relay in the box.