GE
GE THQB2120 Miniature Circuit Breaker 20A 2 Pole 120/240V AC
A 20 A, two-pole miniature circuit breaker rated for 120/240 V AC with a 10 kA interrupting capacity, bolt-on mounting and screw-clamp terminals
- 20 A protection for lighting panels and load centres
- 10 kA interrupting rating clears faults safely
- Bolt-on mounting fits THQB frame panels
- Two-pole design handles 120/240 V AC circuits
- Screw-clamp terminals accept 14–8 AWG copper wire
Application and purpose
The GE THQB2120 is a 20 A, two-pole miniature circuit breaker rated for 120/240 V AC single-phase systems. It fits bolt-on mounting in THQB-series lighting panels and load centers with a 100 A frame size.
Sustained-load behaviour
The device carries its 20 A rating continuously and interrupts fault currents up to 10 kA at the rated voltage. Thermal-magnetic operation provides overload and short-circuit protection without nuisance tripping during normal inrush.
Deciding specification
The bolt-on mounting style and THQB series designation determine whether this breaker fits the target panel; it will not install in plug-on or competitive load-center types.
Highlights
- 20 A protection for lighting panels and load centres
- 10 kA interrupting rating clears faults safely
- Bolt-on mounting fits THQB frame panels
- Two-pole design handles 120/240 V AC circuits
- Screw-clamp terminals accept 14–8 AWG copper wire
Specifications
| Brand | GE |
|---|
Questions about this item
How much heat does the 20 A THQB breaker add when it runs continuously in a loaded panel?
The breaker is rated for 20 A at 120/240 V AC with a 10 kA interrupting rating; normal operation adds only the heat of its internal resistance, which is typical for a standard 2-pole bolt-on design.
What panel and wiring must already be in place for this bolt-on 2-pole breaker to install and operate?
It requires a GE load centre or lighting panel that accepts THQB bolt-on breakers, single-phase 120/240 V AC supply, and copper wire from 14 AWG to 8 AWG or aluminium from 12 AWG to 8 AWG.
Will the 3.5 in by 1 in footprint of this THQB breaker fit the same rail spacing as older GE bolt-on breakers?
The breaker measures 3.5 in long, 1 in wide and 3.3 in deep, matching the standard THQ frame size used in GE panels rated up to 100 A.
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