The face color doesn't always tell us which relays will be found inside.
The plug-in relay has become generic, produced by a dozen vendors.
The Potter and Brumfield part number is "R10-E2-W2-V185". This is the version with 7.5 Amp rated contacts.
Depending on what year it was made, might say "R10-E2-W2-12vdc".
The "R10-E2-X2" version is rated at 5 Amps, and works, so long as the coil is rated for 12 Volts DC.
The lowest current rating is R10-E2-Y2-V185", at 2 Amps. I don't recommend that one, just won't last all that long.
The Potter and Brumfield brand came up with the above part numbers. They got bought by Tyco corporation, now their brand name on a relay might be "Tyco" or "TE Connectivity".
A handful of companies have made exact equivalents. They will merge, get bought and put different names on their products over the years. Makes identifying exact substitutes a research project.
The NTE brand uses a cross-reference volume to look up original type numbers. NTE buys them in bulk, and sells one "NTE" type number to fit all the competing brands that it's compatible with. We don't use NTE relays, but there's nothing wrong with them.
But the price.
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