Mars 90377 277V SPDT General Purpose Power Relay

The Mars 90377 is a heavy-duty general purpose power relay designed for HVAC equipment and commercial applications requiring reliable 277-volt switching. This SPDT (Single Pole Double Throw) relay provides dependable control for fan motors, compressors, and other electrical loads in heating, ventilation, and air conditioning systems.

Key Specifications:

• Coil Voltage: 277V AC, 60 Hz
• Contact Rating: 18 amps resistive load
• Pick-up Voltage: 235V
• Hold Voltage: 152.4V
• Drop-out Voltage: 55.4V
• Terminal Style: 0.25-inch quick-connect terminals
• Mounting: Tab bracket, non-positional design
• Dimensions: 2.38 x 1.63 x 1.50 inches

Features and Benefits:

• Replaces WR/Essex/RBM Type 184 relays for easy retrofitting
• UL and CSA listed for safety and reliability
• Quick-connect terminals for fast, secure installation
• Non-positional tab bracket mounting allows flexible orientation
• Compact footprint fits tight equipment spaces
• Proven design widely used in commercial HVAC applications

The Mars 90377 relay is engineered for long service life in demanding commercial environments where dependable electrical switching at 277 volts is critical. Its robust construction and industry-standard specifications make it an ideal replacement component for HVAC technicians and facility maintenance professionals.