BR2100ST - 100 Amp Circuit Breaker

BR2100ST - 100 Amp Circuit Breaker

The Eaton BR2100ST is a 100 Amp, two-pole thermal magnetic circuit breaker designed for use in compatible Eaton Type BR loadcenters. In addition to providing standard overcurrent protection, this breaker includes a factory-installed shunt trip, allowing it to be opened remotely when connected to an external control circuit. This feature is commonly used in applications where power must be disconnected from a remote location, such as emergency shutdown systems, safety controls, and equipment protection systems.

The breaker features a common-trip design, which means both poles disconnect together if a fault occurs. Its thermal-magnetic trip mechanism helps protect wiring and connected equipment from overloads and short circuits, while the 42 kAIC interrupting rating makes it suitable for applications where higher fault current levels may be present.

Whether you're replacing an existing shunt trip breaker, upgrading a control system, or maintaining an Eaton BR panel, matching the proper breaker type and electrical ratings helps ensure compatibility and reliable operation.

Like many Eaton BR breakers that remain in service for years, the BR2100ST is designed for long-term use when installed according to manufacturer specifications and used within its intended ratings.

Key Features and Benefits

• 100 Amp two-pole circuit breaker
• Factory-installed shunt trip mechanism
• Common-trip design
• Compatible with Eaton Type BR loadcenters
• Thermal-magnetic trip mechanism
• Rated for 120/240V AC applications
• High 42 kAIC interrupting capacity
• Plug-on mounting design
• Accepts #4–1/0 AWG copper or aluminum conductors
• Designed for remote trip, emergency shutdown, and circuit protection applications
  

Technical Specifications

• Manufacturer: Eaton
  
• Catalog Number: BR2100ST
  
• UPC: 786676000406
  
• Product Type: Thermal Magnetic Circuit Breaker
  
• Series: Type BR
  
• Amperage Rating: 100 Amps
  
• Voltage Rating: 120/240V AC
  
• Number of Poles: 2
  
• Trip Type: Common Trip
  
• Shunt Trip: Included
  
• Interrupt Rating: 42 kAIC
  
• Mounting Method: Plug-On
  
• Wire Size Compatibility: #4–1/0 AWG Copper/Aluminum
  
• Compatible Loadcenters: Eaton Type BR
  
• Dimensions: 3.25 in. D × 3 in. W × 3 in. H
  
• Weight: 1.4 lb
  

Material Compliance and Certifications

• UL 489 Listed
• Federal Specifications Classification W-C375
• Manufactured to Eaton Type BR specifications
• Intended for use in compatible Eaton Type BR loadcenters
  

Where It Works Best

• The BR2100ST is commonly used in commercial buildings, manufacturing facilities, equipment control panels, industrial systems, and other electrical installations that require remote breaker operation. Typical applications include emergency power disconnect systems, fire and life-safety controls, machinery shutdown circuits, security systems, and equipment protection systems. It is also frequently used during panel maintenance and replacement projects where maintaining compatibility with existing Eaton Type BR equipment is important.