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White plastic single-pole breaker with black toggle and slotted lugs

SQUARE D

SQUARE D QOU150 Miniature Circuit Breaker 50A 1 Pole 120/240V AC

SKU CH-QSYX-RJRGK

50 A single-pole breaker rated 120/240 V AC with 10 kA interrupting capacity for QO panels

  • 50 A rating protects air-conditioning and refrigeration circuits
  • 10 kA interrupting capacity clears faults on 120/240 V AC systems
  • Single-pole toggle design fits QO load centres and DIN rail mounts
  • Reversible slotted box lugs accept line or load connections
  • 48 V DC rating adds flexibility for mixed AC/DC panels

QOU Series 50 A Breaker

The Square D QOU150 is a single-pole miniature circuit breaker rated at 50 amps for 120/240 V AC and 48 V DC systems. It belongs to the QO series and carries a 10 kA interrupting rating at the AC voltage. The device is designed for branch-circuit protection in residential and light-commercial panels.

Fits QO Load Centres

The breaker mounts on a DIN rail or surface within compatible QO panelboards and load centres. Its reversible slotted box lug accepts line or load conductors without reorientation. The 100 A frame size allows it to sit alongside other QO devices while protecting air-conditioning, refrigeration and heating circuits.

10 kA Interrupting Capacity

In normal operation the toggle actuator provides a clear on-off indication and trips reliably on overcurrent. The 10 kA AIR rating at 120/240 V AC limits let-through energy during a fault. No active cooling is required and the unit operates silently within its enclosure.

How it compares

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

Price $23.99
Cheaper than about 75% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSQUARE D

Questions about this item

What is the maximum AIR rating at 120/240V AC for this 50A breaker?

The QOU150 has a maximum AIR rating of 10kA at 120/240V AC, suitable for standard residential and light commercial fault protection.

How much heat does the toggle actuator generate during continuous 50A operation?

The miniature frame is designed for standard thermal-magnetic operation at 50A; normal warmth is expected, but the 100A frame size provides thermal margin for continuous loads.

Which load center series must I already have to install this QOU breaker?

This breaker is compatible only with Square D QO series panelboards and load centers; it will not fit Homeline or other manufacturers' panels.

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