SureSwitch™ Relay - 49P11-843

Emerson SureSwitch™ Relay - 49P11-843


 Universal Electronic Upgrade for Mechanical Compressor Contactors

  • 5x contactor life
  • Sealed to keep out ants and debris
  • Microprocessor-controlled sealed compressor switching
  • Protects compressor from brownouts and short cycling
  • Ideal for Preventive Maintenance contracts
  • 5 Year Warranty

More Information

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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

SureSwitch Relay vs Traditional Contactor

Electrical Ratings
Line Voltage Input - 208/240 VAC, 50/60 Hz
Locked Rotor Amperes (LRA) - 200A
Selectable Energy Management Recovery
Control (Coil) Voltage (Y, C) - 24 VAC, 50/60 Hz

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

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

1 Pole or 1.5 Pole Applications
  • SureSwitch Relay breaks only one leg of the incoming 220VAC power and has an un-switched brass shunt on the second leg.
  • In most cases SureSwitch can also replace an existing 2 pole contactor, however, the condenser cannot have any switched 120V internal loads in these applications.
Brownout Protection
  • Auto shut off when line voltage drops below 180Vac for more than 4 seconds.
Short Cycle Protection
  • 0s or 180s selectable delay between cycles to extend the life of the compressor.
Random Start Delay
  • Delays operation for 3 minutes plus a 5-90 second random delay after power outage to protect the compressor and avoid brownouts.

2-3/4" W x 2-3/8" H x 3-7/8" L
With Universal Mounting & Wiring Adapter

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