BR120ST - 20 Amp Circuit Breaker

BR120ST - 20 Amp Circuit Breaker

The Eaton BR120ST is a 20 Amp, single-pole Type BR circuit breaker with a factory-installed shunt trip. It's designed for use in compatible Eaton BR loadcenters and is commonly found in applications where a breaker needs to be tripped remotely by an external device or control circuit.

Rated for 120/240VAC with a 10kAIC interrupting capacity, the BR120ST combines standard thermal-magnetic circuit protection with shunt trip functionality in a single breaker. The thermal-magnetic trip mechanism responds to overloads and short circuits, while the shunt trip allows the breaker to be opened remotely when connected to the appropriate control system.

You'll often see breakers like the BR120ST used alongside fire alarm systems, emergency shutdown stations, access control systems, elevator equipment, industrial controls, and other installations where power needs to be disconnected without manually operating the breaker. Because it uses Eaton's Type BR plug-on format, it's frequently selected when matching an existing panel configuration or replacing a breaker with the same ratings and features.

Like many Eaton circuit breakers that have been installed in residential, commercial, and industrial facilities for years, the BR120ST is built to last when properly installed and used within its intended ratings.

Key Features and Benefits

• 20 Amp current rating
• Single-pole configuration
• Thermal-magnetic trip mechanism
• Factory-installed shunt trip
• Type BR plug-on design
• Rated for 120/240VAC systems
• 10kAIC interrupting capacity
• Compatible with Eaton Type BR loadcenters
• Accepts #14-4 AWG copper or aluminum conductors
• Allows remote breaker operation through an external control signal

Technical Specifications

• Manufacturer: Eaton
  
• Catalog Number: BR120ST
  
• UPC: 786676000161
  
• Product Type: Thermal Magnetic Circuit Breaker with Shunt Trip
  
• Series: Type BR
  
• Amperage Rating: 20 Amps
  
• Number of Poles: 1
  
• Voltage Rating: 120/240VAC
  
• Interrupt Rating: 10kAIC
  
• Mounting Method: Plug-On
  
• Shunt Trip: Included
  
• Wire Size: #14-4 AWG Copper/Aluminum
  
• Width: 1 in.
  
• Height: 2 in.
  
• Depth: 2.5 in.
  
• Weight: 0.3 lb.
  

Material Compliance and Certifications

• UL 489 Listed
• Federal Specifications Classification W-C375
• Manufactured to applicable industry standards for molded case circuit breakers
• Intended for installation in compatible Eaton Type BR loadcenters and panelboards
  

Where It Works Best

• Eaton Type BR loadcenters
• Commercial electrical systems
• School and institutional facilities
• Healthcare facilities
• Industrial control panels
• Fire alarm shutdown circuits
• Access control systems
• Emergency power disconnect applications
• Maintenance and replacement projects requiring a Type BR shunt trip breaker
• Branch circuits requiring remote tripping capability
• The BR120ST is commonly selected when a compatible Eaton Type BR breaker with a factory-installed shunt trip is required. Matching the breaker type, amperage rating, voltage rating, and panel compatibility helps ensure proper installation and operation within the electrical system.