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Compact grey GE circuit breaker with black toggle switch and screw terminals

GE

GE THHQB1120 Miniature Circuit Breaker 20A 1 Pole 120/240V AC

SKU CH-W571-B9VEA

A 20 A single-pole breaker rated 120/240 V AC with a 22 kA interrupting capacity and bolt-on mounting for load centres

  • High interrupting capacity protects circuits up to 22kA
  • Single-pole design fits 120/240V AC panels
  • Bolt-on mounting secures to load centers and lighting panels
  • Screw-clamp terminals accept wire down to 14 AWG
  • Compact 3.3 in frame saves space in 60A enclosures

GE THHQB1120 20A Single-Pole Breaker

This GE THHQB1120 is a 20 amp miniature circuit breaker built for 120/240 volt AC residential and light-commercial panels. It provides high interrupting capacity protection on a single phase for branch circuits such as lighting, receptacles or small appliances.

Bolt-on mounting for compatible load centers

The breaker uses a bolt-on mounting style that secures directly to the bus connections of GE load centers and lighting panels. Screw-clamp terminals accept copper conductors down to 14 AWG, and the 1-inch width fits standard single-pole spaces without requiring additional panel modifications.

Replaces lower-AIR or plug-on single-pole breakers

With a 22 kA interrupting rating at 120/240V AC, this unit upgrades installations where the existing breaker has a lower AIR value or a plug-on design unsuited to the panel bus. The jump is worthwhile when local code demands higher fault-current protection or when the panel specifies bolt-on THHQB series devices.

How it compares

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

Price $72.99
Pricier than about 61% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameGE

Questions about this item

What is the maximum interrupting capacity of the 20A THHQB breaker?

The GE THHQB1120 has a maximum AIR rating of 22kA at 120/240V AC, providing high interrupting capacity for fault protection.

How much heat does the bolt-on THHQB breaker generate during continuous operation?

As a passive electromechanical device, the breaker produces minimal heat under normal 20A load; sustained warmth indicates a loose screw-clamp terminal or an overloaded circuit.

Which load-center bus system is required to mount this single-pole breaker?

The 1-inch wide, bolt-on frame fits GE load centers and lighting panels with a 60A THHQB bus; it accepts 14 AWG minimum wire via screw-clamp terminals.

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