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White-Rodgers 49P11-843 SureSwitch Relay


Product Description

Universal Electronic Upgrade for Mechanical Compressor Contactors


  • 5x contactor life
  • Sealed relay to keep out ants and debris 
  • Microprocessor control nearly eliminates contact welding and pitting
  • Ideal install with new Preventative Maintenance contracts
  • Compressor is protected from brownouts and short cycling
  • Save on pest control treatments


  • Microprocessor controlled sealed compressor switching
  • Line voltage brownout protection 
  • Short cycle protection
  • Tricolor LED displays
  • Heavy-duty lug connectors
  • Zero chatter latching relay 
  • Four-hole mounting matches mechanical contactors 
  • Random start delay on power up and brownout recovery
  • Compressor test and cycle count by pushbutton

Performance Tested

The sealed SureSwitch relay has underwent exhaustive testing on Copeland 5-ton scroll compressors to demonstrate ultimate reliability. This technology has been utilized on OEM controls since 2006 and is now available for the Aftermarket.

Electrical Ratings

Line Voltage Input: 208/240 VAC, 50/60 Hz
Full Load Amperes (FLA): 40A
Locked Rotor Amperes (LRA): 200A
Control (Coil) Voltage (Y, C): 24 VAC, 50/60 Hz

Recommended Terminal Torque – C, R, L1 and L2
#4 – 6 AWG: 45 in-lbs
#8 AWG: 40 in-lbs
#10 – 14 AWG: 35 in-lbs
24 VAC (Y, C) Terminals are ¼" Male QC’s accepting #12-24 AWG wire

Anti-Short-Cycle Delay: 0s or 180s (selectable) at 60 Hz; 0s or 216s (selectable) at 50 Hz
Compressor Test: 5s at 60 Hz; 6s at 50 Hz

2-3/4" W x 2-3/8" H x 3-7/8" L

Operating Temperature Range
-40° to 158° F (-40° to 70° C)

Humidity Range
5 to 95% relative Humidity (non-condensing)

SureSwitch requires line voltage for operation and testing

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1.00 LBS
Calculated at checkout