ABB / GE THQB1120DF 20 Amp 1 Pole Dual Function AFCI/GFCI Bolt-On Circuit Breaker – THQB Series – 120V AC

The ABB / GE THQB1120DF is a 20 Amp, 1-pole dual-function circuit breaker designed to provide both arc-fault (AFCI) and ground-fault (GFCI) protection in a single device. It is intended for commercial and residential applications where NEC compliance requires enhanced protection against both electrical arcing and ground faults. The breaker features a bolt-on mounting design for secure installation in GE A-Series panelboards and AQ lighting panels.

Voltage and Rating

• Current Rating: 20 Amps
• Voltage Rating: 120 VAC
• Number of Poles: 1
• Phase: 1-phase applications
• Interrupting Rating: 10 kA @ 120 VAC
• Device Type: Dual Function AFCI / GFCI Circuit Breaker

Key Specifications

• Series: THQB (Q-Line Bolt-On)
• Breaker Type: Thermal Magnetic with AFCI and GFCI protection
• Trip Technology: Fixed thermal and instantaneous with arc fault + ground fault detection
• Application: Enhanced electrical safety for NEC-compliant installations
• Mounting Style: Bolt-On
• Brand: ABB / GE

Technical Specifications

• Special Classification: Dual Function (AFCI + GFCI)
• Trip Function Code: LIG (Long-Time, Instantaneous, Ground Fault)
• Wire Range:
  • Copper: 14–8 AWG
  • Aluminum: 12–8 AWG
• Safety Features:
  • Self-test functionality
  • SWD rated
  • HACR rated
  • Non-interchangeable trip
  • Quick-make/quick-break mechanism

Standards and Approvals

• UL 489
• UL 943 (GFCI)
• UL 1699 (AFCI)
• CSA C22.2 No. 5
• NEMA AB 1
• HACR / SWD compliant

Product Data

• Manufacturer: ABB / General Electric
• Catalog Number: THQB1120DF
• Series: THQB Q-Line Bolt-On
• Product Type: Circuit Breaker (Dual Function AFCI/GFCI)

Application

• NEC-required protected branch circuits
• Residential and commercial lighting circuits
• Wet and damp location receptacle protection
• High-safety electrical installations
• Retrofit or new panelboard installations

Returns are easy

You may return items within 30 days of delivery for a refund.

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