ETC AR20 | Dual 20A 277V Relay Module for Unison Racks

High-Performance 277V Relay Module for Dimming Racks

The ETC AR20 is a robust, dual 20-amp, 277V relay module engineered for seamless integration with Unison Dimming Series rack enclosures. Ideal for controlling non-dimmed loads such as motors, fans, moving lights, and HID ballasts, it ensures consistent performance in demanding applications. Its magnetic circuit breakers and high inrush tolerance make it especially reliable for high-load switching environments.

ETC AR20 Competitive Differences

• Dual 20A mechanical relays with level activation for reliable on/off switching
• Rated for 200,000 full-load activations and 5 million no-load activations
• High-density modular design with plug-in assemblies for easy installation
• Fully magnetic circuit breakers with 20x inrush current tolerance
• 65,000A SCCR with hot-patching capabilities
• UL and cUL Listed for continuous duty at 100% rated load (5.5kW)

ETC AR20 Description

The ETC AR20 is specifically designed to support non-dimmed, switched loads within Unison 277V DRd rack systems. With its dual 20A mechanical relays and die-cast aluminum chassis, it delivers durability, efficiency, and optimal thermal performance via an integrated bonded heatsink. Perfect for powering motors, HID ballasts (metal halide, high pressure sodium), fog machines, moving lights, and other high-draw effects, this module is an essential component for venues demanding reliable power distribution and switching control. Engineered for high-frequency use, it maintains a high inrush rating and extended relay life, making it suitable for commercial and entertainment applications alike.

AR20 Features

• Level-activated mechanical relays
• Two circuits per module
• High-density modular plug-in design
• Die-cast aluminum chassis with epoxy finish
• Fully magnetic circuit breakers

AR20 Specifications

• Voltage: 277V
• Load Capacity: Dual 20A, 5.5kW total
• SCCR: 65,000A
• Relay Ratings: 200,000 full-load activations, 5 million no-load activations
• Horsepower Rating: 3.46 HP at 20A
• Relay Types: 20A General Purpose, 10A Tungsten, 1.5 HP Motor Max
• Circuit Breakers: 20x inrush rating, 125% must-trip (10–120 sec)
• Construction: Cast aluminum chassis with bonded heatsink
• Control Isolation: 4000V between control and power
• Dimensions: 1.5" x 11.8" x 4.9" (38 x 300 x 124 mm)
• Weight: 2.6 lbs (1.2 kg)