Overview
The General Electric TEY120 circuit breaker is a compact, 1-pole molded case breaker from the Q-Line series, engineered for lighting and power distribution in commercial and industrial applications. Rated at 20 amperes and 277VAC with a 14kA interrupting capacity at 277V, the TEY120 delivers dependable protection in grounded 480Y/277V AC panelboards with minimal footprint—just one inch wide per pole.
Key Features
- Molded Case Design: Thermal magnetic trip unit ensures consistent overload and short-circuit protection
- Single-Pole Configuration: Ideal for single-phase applications requiring dedicated circuit protection
- Bolt-On Mount: Secure installation in grounded 480Y/277V AC panelboards and supports both copper and aluminum conductors
- Long-Time & Instantaneous Trip: Includes long time and instantaneous trip functions for fast fault clearing
- Non-Interchangeable Trip Unit: Factory-calibrated for consistent performance; cannot be field-swapped
- UL Listed: The TEY series is UL Listed and designed to meet the needs of modern electrical distribution systems
Technical Specifications
The TEY120 operates reliably across standard industrial voltage and current ratings:
- Current Rating: 20 Amperes
- Voltage Rating: 277VAC (maximum); also rated 120/240V
- Interrupting Capacity: 14kA at 277V; 65kA at 120V
- Trip Function: Thermal-Magnetic
- Connection Type: Bolt-On
- Poles: 1
- Phase: Single-Phase
- Operating Temperature: Up to 40°C
- Conductor Type: Copper & Aluminum compatible
- Series: Q-Line, Type TEY
Typical Applications
The General Electric TEY120 is ideally suited for:
- Lighting panelboards in commercial buildings
- 480Y/277V power distribution systems
- Industrial control panels and electrical distribution
- Branch circuit protection in high-voltage environments
- Facilities requiring compact, single-pole protection with high interrupting ratings
Compatibility & Replacements
Compatible With
- GE Q-Line panelboards (480Y/277V grounded systems)
- Standard lighting panel enclosures accepting bolt-on breakers
- 480Y/277V three-phase, four-wire electrical systems
- Circuits rated 16–30A (nominal 20A application range)
Replaces / Drop-In Replacement For
The TEY120 is the standard part number. Verify compatibility with your system integrator before ordering alternative models or legacy equivalents.
Works With
- Standard electrical conduit and wiring installation methods
- NEMA-compliant panelboards
- Thermal-magnetic overcurrent protection coordination strategies
- UL-listed busbar and stab configurations in lighting panels
