GE
GE THQB1150 Miniature Circuit Breaker 50A 1 Pole 120/240V AC
A 50 A, single-pole miniature breaker rated 120/240 V AC with 10 kA interrupting capacity, bolt-on mounting and UL listing
- 50 A protection for lighting panels and load centres
- 10 kA interrupting rating at 120/240 V AC
- Single-pole bolt-on design fits 100 A THQ frames
- UL Listed for code-compliant installations
- Accepts 14–8 MCM copper or 12–8 MCM aluminium wire
GE THQB1150 50A Circuit Breaker
The GE THQB1150 is a miniature circuit breaker rated at 50 amps for 120/240V AC systems. It uses a single-pole, bolt-on design from the THQB series with a 10kA interrupting rating. The toggle actuator provides manual switching for lighting panels and load centers. UL Listed construction supports copper wire from 14 to 8 MCM and aluminum from 12 to 8 MCM.
Installers protecting single-phase 50A branch
This breaker suits electricians wiring standard lighting panels or load centers that accept THQB bolt-on frames. It is not for buyers who need DC voltage protection or multi-pole configurations for 240V-only loads. Installers requiring a higher AIR rating or a different mounting style such as plug-in should look at other series.
10kA AIR rating at 120/240V AC
The maximum interrupting rating of 10kA determines whether this breaker can safely clear a fault in your panel. Verify that the available fault current at the installation point does not exceed this value. The bolt-on mounting and THQB frame size of 100A must match the load center specifications for a secure fit.
Highlights
- 50 A protection for lighting panels and load centres
- 10 kA interrupting rating at 120/240 V AC
- Single-pole bolt-on design fits 100 A THQ frames
- UL Listed for code-compliant installations
- Accepts 14–8 MCM copper or 12–8 MCM aluminium wire
Specifications
| Brand | GE |
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Questions about this item
What panel depth and width does the 3.5 in by 1 in bolt-on frame require?
The breaker measures 3.5 in long, 1 in wide and 3.3 in deep, so the panel cut-out must accommodate those dimensions for a secure bolt-on fit.
Which torque value should be used when tightening the lug terminals for 8 MCM copper wire?
Tighten the lug terminals to the torque printed on the breaker label; the 8 MCM maximum wire size is rated for the 50 A, 120/240 V AC circuit.
When should the THQB1150 be replaced after a fault interruption?
Replace the breaker if it has tripped on a short-circuit at the 10 kA interrupting rating or shows any contact erosion, as repeated high-current trips degrade the toggle mechanism.
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