We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
SQUARE D QOU245 two-pole miniature circuit breaker with black toggle and slotted box lug terminals

SQUARE D

SQUARE D QOU245 45A 2 Pole 120/240V AC Circuit Breaker

SKU CH-KAB3-QTH3C

Two-pole miniature circuit breaker rated 45 A at 120/240 V AC and 48 V DC with a 10 kA interrupting rating for QO load centres

  • 45 A rating handles heavy-duty residential and light-commercial loads
  • 10 kA interrupting capacity clears faults safely at 120/240 V AC
  • Two-pole design protects both legs of a 120/240 V circuit
  • QO series compatibility ensures direct fit in Square D QO load centres
  • Reversible slotted box lugs simplify line and load wiring

SQUARE D QOU245 45A 2-Pole Breaker

The SQUARE D QOU245 is a QO series miniature circuit breaker rated at 45A with two poles for 120/240V AC systems. It mounts on surface or DIN rail and fits QO compatible panelboards and load centers. The unit provides 10kA interrupting capacity at 120/240V AC and carries a 48V DC rating. Reversible slotted box lug terminals simplify line and load connections.

Ideal for residential and light commercial panels

This breaker suits electricians and maintenance teams protecting air conditioning, refrigeration and heating circuits in QO series load centers. The 45A rating matches common HVAC branch circuits. Installers needing a different amperage, a three-pole configuration or a non-QO mounting footprint should select another model. Builders without a QO compatible panelboard cannot use this breaker.

45A two-pole 120/240V AC rating

The decisive specification is the 45A two-pole rating at 120/240V AC with 10kA AIR. This defines the circuit capacity and fault protection level the breaker delivers. Verify that the panelboard is a QO series unit and that the load requires exactly 45A two-pole protection before purchasing.

How it compares

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

Price $63.99
Pricier than about 56% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSQUARE D

Questions about this item

Will the 45 A two-pole breaker fit on a DIN rail or surface mount in my QO load centre?

The QOU frame is designed for both surface and DIN rail mounting and is compatible with QO series panelboards.

Which terminals accept the line and load conductors on this 120/240 V AC breaker?

Slotted box lugs are reversible, so either terminal can serve as line or load.

When should I plan to replace this 45 A miniature circuit breaker?

Replace it if the toggle fails to reset, the breaker trips below its 45 A rating, or after a fault exceeding the 10 kA interrupting capacity.

More in Breakers & Circuit Protection

Similar items