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Square D QOU220 two-pole miniature breaker, grey toggle, DIN-rail mount

SQUARE D

SQUARE D QOU220 Miniature Circuit Breaker 20A 2 Pole 120/240V AC

SKU CH-WR04-8HC7Q

A two-pole miniature circuit breaker rated 20 A at 120/240 V AC with a 10 kA interrupting capacity for QO load centres

  • 20 A rating protects 120/240 V AC circuits
  • 10 kA interrupting capacity handles fault currents safely
  • Two-pole design controls both hot legs simultaneously
  • Slotted box lug terminals accept reversible line and load wiring
  • QO series frame fits compatible panelboards and load centers

QOU Series 20 A Breaker

This Square D miniature circuit breaker carries a 20 A rating and a 120/240 V AC voltage rating for standard single-phase panels. It mounts on DIN rail or surface hardware and uses a reversible slotted box lug for line or load connections. The toggle actuator provides clear on/off indication.

Suits QO Panels Only

Electricians fitting a Square D QO load centre will find the correct frame size and 10 kA interrupting rating at 120/240 V AC. Installers using other panel brands or needing a higher AIC rating should select a different series. The breaker is also rated 48 V DC for limited low-voltage circuits.

10 kA AIR at 120/240 V AC

The maximum ampere interrupting rating of 10 kA at 120/240 V AC determines whether this device meets the fault-current requirement of the installation. Verify the available short-circuit current before specifying this breaker.

How it compares

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

Price $42.99
Cheaper than about 61% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSQUARE D

Questions about this item

Should I choose the 20 A two-pole version or a different amperage for my QO panel?

Select the 20 A two-pole breaker when the circuit requires 20 amps at 120/240 V AC; other QOU models cover different amp ratings but share the same frame and mounting.

What does the 10 kA AIR rating mean once the breaker is installed in a load centre?

The 10 kA interrupting rating means the breaker can safely clear a short-circuit current up to 10 000 amps at 120/240 V AC without damage.

Will the slotted box lug terminals accept standard copper wire on both line and load sides?

Yes, the reversible slotted box lugs are designed for standard copper conductors on either the line or load side.

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