Overview
The Eaton BR320 circuit breaker is a compact, plug-on thermal-magnetic breaker designed for standard load center installations. This Type BR breaker delivers reliable short-circuit and overload protection in 240V AC systems with common-trip functionality across all three poles. The BR320 is fully HACR-rated, making it suitable for dedicated HVAC circuits and general industrial/commercial branch circuit protection.
Key Features
- 20-amp rating with 10 kAIC (10,000-ampere) interrupting capacity at 240V
- 3-pole, common-trip thermal-magnetic protection mechanism
- Plug-on mounting—compact 1-inch width for standard Eaton/Cutler-Hammer load centers
- HACR-rated for HVAC/refrigeration circuit protection
- Accepts 14–4 AWG copper or aluminum conductors
- UL 489 listed and CSA certified for safety compliance
Technical Specifications
- Manufacturer: Eaton (Cutler-Hammer)
- Model: BR320
- Voltage Rating: 240V AC
- Current Rating: 20 amperes
- Poles: 3
- Interrupting Capacity: 10 kAIC @ 240V
- Wire Size: #14–4 AWG (copper or aluminum)
- Trip Style: Common Trip
- Mounting Type: Plug-on (Type BR)
- Case Material: Molded thermal-magnetic
- HVAC Rated: HACR
- Certifications: UL 489, CSA
Typical Applications
- General-purpose branch circuit protection in commercial and industrial panels
- Dedicated HVAC unit and air conditioning compressor circuits
- Motor branch circuit protection up to 20 amps
- Replacement breaker in existing Eaton load center upgrades
- Single-phase 240V equipment protection in machine shops and facilities
Compatibility & Replacements
Compatible With
- Eaton/Cutler-Hammer Type BR load centers and panelboards
- Standard BR-series plug-on breaker slots
- 240V single-phase AC power systems
- Common-trip three-pole breaker applications
- Both copper and aluminum branch circuit wiring
Replaces / Drop-In Replacement For
- Eaton Cutler-Hammer C320 (C-series equivalent)
- Other 20A, 240V Type BR 3-pole breakers in Eaton load centers
- Verify compatibility with your specific load center model before ordering
Works With
- Eaton BR, BR2, and related Type BR panelboard families
- Standard 120/240V single-phase service entrance configurations
- Thermal-magnetic trip coordination in multi-breaker systems
- HVAC and refrigeration system branch circuit designs
