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Small white rectangular relay box, hardwired AC power, form C contacts included

BRK

BRK Smart Relay Wire-In AC Power Personal Protective Equipment

SKU CH-B0FW-ZDD5R

A hard-wired 120V AC smart relay with Form C contacts links BRK and First Alert alarms, operating from 40 to 100 °F and meeting UL 217, UL 2034 and UL 539 standards

  • Hardwired 120V AC power ensures reliable alarm operation
  • Form C contacts enable flexible integration with BRK and First Alert alarms
  • UL 2034, UL 217 and UL 539 certifications confirm safety compliance
  • Operates from 40 to 100 degrees F for dependable performance in varying conditions
  • Compact 3.5 x 1.5 x 1 in design fits easily into standard electrical boxes

Smart Relay for AC Alarm Systems

This BRK Smart Relay is a wire-in module designed to integrate with compatible BRK and First Alert smoke, heat and carbon monoxide alarms. It operates on a 120V AC hardwired power source and includes one set of Form C contacts for switching external devices. The unit functions within a temperature range of 40 to 100 degrees Fahrenheit.

Compact Hardwired Build for Junction Boxes

Measuring 3.5 inches long, 1.5 inches wide and 1 inch high, the relay fits inside standard electrical boxes for a clean installation. Hardwired power eliminates battery maintenance, while the Form C contact set provides both normally open and normally closed switching options. UL 2034, UL 217 and UL 539 listings confirm compliance with smoke alarm and relay safety standards.

Upgrade for Interconnected Alarm Installations

The relay replaces standalone alarm sounders when a builder needs to trigger auxiliary equipment such as strobes, sirens or home automation inputs. It is not suited for low-voltage or battery-only alarm systems that lack a 120V AC supply. The 10-year limited manufacturer warranty aligns with the typical service life of the alarms it connects to.

Highlights

  • Hardwired 120V AC power ensures reliable alarm operation
  • Form C contacts enable flexible integration with BRK and First Alert alarms
  • UL 2034, UL 217 and UL 539 certifications confirm safety compliance
  • Operates from 40 to 100 degrees F for dependable performance in varying conditions
  • Compact 3.5 x 1.5 x 1 in design fits easily into standard electrical boxes

Specifications

BrandBRK

Questions about this item

What AC voltage does the 120V smart relay switch?

The relay is rated for 120V AC power and is designed to work with BRK and First Alert smoke, heat and carbon monoxide alarms.

Will the 3.5 in by 1.5 in housing fit my junction box?

The unit measures 3.5 in long, 1.5 in wide and 1 in high, so verify your box has enough volume for these dimensions before wiring.

How do I wire the hardwired power source and Form C contacts correctly?

Connect the 120V AC supply to the coil terminals and use the single set of Form C contacts for the alarm interconnect loop, observing the 40 to 100 degree F operating range.

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