Replacement for Mars Double Pole / 2 Pole 40 Amp 24v Replacement Condenser Contactor 3100Y20Q1800CL This is a Brand New Upgraded 2 Pole 40 Amp Condenser Contactor The coil is rated for 24 volts, making it compatible with 99% of all residential units. This is a "Heavy Duty" contactor rated at 40 Amps!