GE
GE THQB1120 Miniature Circuit Breaker 20A 1 Pole 120/240V AC
Miniature circuit breaker rated 20 A, single-pole, 120/240 V AC with 10 kA interrupting capacity and bolt-on mounting for load centres
- 20 A single-pole protection for 120/240 V circuits
- 10 kA interrupting rating clears faults safely
- Bolt-on mounting fits standard lighting panels and load centres
- Screw-clamp terminals accept 14–8 AWG copper or 12–8 AWG aluminium
- Compact 3.5 in by 1 in by 3.3 in frame saves panel space
GE THQB1120 Miniature Circuit Breaker
The GE THQB1120 is a 20 amp single-pole miniature circuit breaker rated for 120/240V AC. It belongs to the THQB series and fits a 100A frame size. Electricians and facility managers use it to protect lighting panels and load centres in residential and light-commercial installations.
Bolt-on mounting with screw-clamp terminals
The breaker mounts by bolting directly onto the panel bus, providing a secure mechanical connection that resists vibration. Screw-clamp terminals accept copper wire from 14 AWG up to 8 AWG and aluminium wire from 12 AWG up to 8 AWG. A toggle actuator gives clear on/off indication during routine maintenance or fault finding.
10 kA interrupting rating at 120/240V AC
The maximum AIR rating of 10 kA at 120/240V AC defines the fault current the breaker can safely interrupt. Systems with available fault current above this level require a different protective device. The breaker carries no DC voltage rating, so it must not be used in DC circuits.
Highlights
- 20 A single-pole protection for 120/240 V circuits
- 10 kA interrupting rating clears faults safely
- Bolt-on mounting fits standard lighting panels and load centres
- Screw-clamp terminals accept 14–8 AWG copper or 12–8 AWG aluminium
- Compact 3.5 in by 1 in by 3.3 in frame saves panel space
Specifications
| Brand | GE |
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Questions about this item
What interrupting capacity does the THQB1120 provide at its rated voltage?
The breaker is rated for a maximum AIR of 10kA at 120/240V AC.
What panel space and mounting style does this single-pole unit require?
It uses a bolt-on mounting style, measures 3.5 in long by 1 in wide by 3.3 in deep, and fits a 100A THQ frame.
Which wire gauges are accepted by the screw-clamp terminals, and what preparation step is often missed?
Terminals accept 14 to 8 AWG copper or 12 to 8 AWG aluminium; the step often missed is tightening the screw-clamp to the specified torque.
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