Overview
The General Electric THQC1120GF is a molded-case, plug-in ground fault circuit breaker designed for single-pole protection in electrical distribution systems. Built on the Q-Line platform, this unit combines proven reliability with GFCI (ground fault circuit interrupter) functionality to protect against electrical shock hazards and circuit faults. The lug-terminal configuration enables load-side connections, making it ideal for feed-through or distribution applications.
Key Features
- GFCI Protection: Detects ground faults and trips within milliseconds to prevent electrical shock
- Thermal-Magnetic Trip: Long-time and instantaneous trip functions for overload and short-circuit protection
- Q-Line Design: 1-inch-wide, compact form factor; fits standard 35 mm DIN-rail mounting
- Lug Terminals: Load-side lugs simplify panel wiring and feed-through installations
- UL Listed: Certified for safety and performance standards
- Quick-Make/Quick-Break: Fast mechanical action ensures reliable contact closure and opening
Technical Specifications
Key operational parameters for integration and panel planning:
- Rated Amperage: 20 A
- Poles: 1 (single-pole)
- Voltage Rating: 120 V AC
- Interrupting Rating: 10 kA @ 120 V
- Trip Type: GFCI (Ground Fault Circuit Interrupter)
- Mechanism: Thermal-Magnetic with long-time and instantaneous functions
- Mounting: Plug-in (35 mm DIN-rail compatible)
- Terminal Type: Lug-in / Lug-out (load-side lugs)
- Form Factor: 1 inch wide × 2.38 inches deep × 3.56 inches high
- Series: Q-Line (THQC class)
- Certifications: UL Listed
Typical Applications
The THQC1120GF is suited for:
- Residential circuit protection requiring ground fault detection
- Commercial branch circuits and feeder lines
- Industrial control and distribution panels
- Kitchen, bathroom, and outdoor outlet circuits (where GFCI is mandated)
- Feed-through breaker configurations in multi-breaker panels
Compatibility & Replacements
Compatible With
- General Electric Q-Line panelboards and enclosures
- 35 mm DIN-rail mounting systems
- Standard 120 V AC electrical distribution networks
- Existing GE breaker configurations with 20A, 1-pole requirements
Replaces / Drop-In Replacement For
The THQC1120GF directly replaces other GE Q-Line 20A, 1-pole, 120V GFCI breakers in the THQC family. Verify exact application fit with your system integrator or panel documentation before ordering, as some older or specialized applications may require different terminal styles or voltage ratings.
Works With
- General Electric panelboard firmware and configuration systems
- Standard UL-listed electrical distribution enclosures
- Thermal-magnetic trip coordination with upstream protective devices
- Low-voltage control and automation networks (when used with appropriate auxiliary contacts)
