DaveC writes:

I may be able to obtain a very small 2-pole 240 vac contactor I need rated
for 50 Hz only.

If I install it in N. America, what's the implication? Is the hold-in
magnetism less than if it were 60 Hz? Just noisy?

It will be happy. If it were a 60Hz on 50, it would not be as happy.

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