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Compact grey toggle breaker with bolt-on base

GE

GE THQB1120 Miniature Circuit Breaker 20A 1 Pole 120/240V AC

SKU CH-XHP5-6NJN6

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.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $28.99
Cheaper than about 71% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameGE

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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