25fbba02_rts_and_Sources___OpenCircuits__Comments
[What] Relays [Where] Microwave ovens. Modems Audio amplifiers [Comments] 
Useful to go from logic levels to 120 vac. Coil is often 12v or 24 volts, use with a transistor low side switch ( for example ) to interface with logic levels
Salvage Parts and Sources - OpenCircuits
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