Emerson 49M11-843 SureSwitch™ Multi-Volt Universal Contactor

SureSwitch™ is an electronically-controlled relay that can be used to replace single and two-pole contactors commonly used in air conditioners, heat pumps and other applications. A patented switching algorithm reduces arcing between contacts, which nearly eliminates pitting and welding for a longer life. The switching mechanism is sealed to prevent intrusion from insects and other debris.

SureSwitch is similar to a 1 1 /2 pole contactor, in that L1 only the compressor terminal T1(C) is switched. The compressor terminal T2(R) is connected by a shorting bar to line input L2, and is energized even when a call is not present.

• Multi-volt coil works with all common coil voltages
• 5x traditional contactor life
• Totally sealed switch keeps out ants, pests and debris
• Microprocessor control inhibits arcing that cause welding and pitting
• Line voltage brownout protection and short cycle timer provide compressor protection
• Zero chatter latching relay
• Heavy-duty lug connectors
• 5-year limited warranty
• Four-hole mounting matches mechanical contactors
• Tri-color LED with compressor test and cycle count by pushbutton

Data Sheet

Installation Instructions

Specifications