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Square D QO320 three-pole circuit breaker grey plastic body toggle switch visible

SQUARE D

SQUARE D QO320 Circuit Breaker 20A 3 Pole 120/240V AC

SKU CH-R2VP-PX482

Three-pole thermal-magnetic breaker rated 20 A at 120/240 V AC with 10 kA interrupting capacity and VisiTrip indication

  • 20 A three-pole breaker protects three live conductors
  • 10 kA interrupting rating clears high fault currents safely
  • VisiTrip indicator shows tripped status at a glance
  • UL Listed and CSA Certified for code compliance
  • Plug-in mounting speeds panel installation and maintenance

QO320 Three-Pole Circuit Breaker

The Square D QO320 is a miniature thermal-magnetic circuit breaker rated at 20A and 120/240V AC. It features a three-pole configuration with plug-in mounting for QO load centres. The breaker provides 10kA interrupting capacity and includes VisiTrip indication for clear trip status.

Installers protecting three-phase

This breaker suits electricians and maintenance staff who need UL Listed and CSA Certified overcurrent protection for 20A three-pole circuits. It is not for applications requiring higher amperage ratings, different voltage systems, or bolt-on mounting styles.

20A rating at 120/240V AC

The 20A, 120/240V AC rating is the primary specification that determines circuit compatibility. Verify that the load centre accepts QO plug-in breakers and that the circuit design calls for a 20A three-pole device before installation.

How it compares

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

Price $84.99
Pricier than about 64% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSQUARE D

Questions about this item

What does the 20 A rating mean once the breaker is installed in a panel?

The breaker will carry up to 20 amps continuously and trip if the current exceeds that value, protecting the downstream wiring from overload.

How does the 120/240 V AC rating limit where this three-pole breaker can be used?

It is designed for single-phase three-wire systems delivering 120 V phase-to-neutral and 240 V phase-to-phase; it is not rated for higher voltages or three-phase delta configurations.

What does the plug-in mounting style require for installation?

The breaker plugs directly onto the panel bus stabs; the panel must be a QO-load-center with matching plug-on buswork for a secure connection.

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