Emerson 49P11-843 Sure Switch Relay 24 VAC, 30 Amp; 5x contactor life; Sealed to keep out ants and debris(now rated to 40 Amp.) Microprocessor control nearly eliminates contact welding and pitting Ideal install with new PM contract; Tricolor LED displays Compressor protected from brownouts and short cycling; Save on pest control treatments Heavy-duty lug connectors; Zero chatter latching relay