Emerson 49P11-843 SureSwitch 40A 2-Pole 24V Electronic Contactor

Overview

The Emerson SureSwitch 49P11-843 is a microprocessor-controlled electronic compressor contactor designed to replace traditional mechanical HVAC contactors.

Unlike standard contactors, the SureSwitch eliminates contact chatter and greatly extends compressor protection through advanced internal logic.

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🔧 Key Performance Features:

✔ 40 Amp rated, 2-Pole configuration

✔ 24V coil control

✔ Handles up to 200A LRA @ 240V

✔ Brownout protection

✔ Short cycle protection

✔ Zero chatter solid-state latching

✔ Tri-color LED diagnostic display

✔ Random start delay on power up

✔ Push-button compressor test & cycle count

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🚀 Why HVAC Techs Prefer SureSwitch

• Extends contactor life up to 5X longer than mechanical contactors

• Eliminates welded contacts caused by insects or debris

• No need for external time delay relays

• Built-in brownout monitoring

• Direct mechanical contactor footprint (4-hole mounting)

Ideal replacement for standard 2-pole 40A HVAC contactors in:

• Residential AC systems

• Heat pumps

• Light commercial rooftop units

Perfect for preventive maintenance upgrades.

Product details

Part / SKU	49P11-843

Package includes

• Emerson 49P11-843 SureSwitch 40A 2-Pole 24V Electronic Contactor

Included components and any stated pack quantity are as described in this listing. Optional accessories shown separately are sold separately unless expressly included above.