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White rectangular miniature circuit breaker with black paddle actuator and pressure-plate terminals, bolt-on mount, QO series

SQUARE D

SQUARE D QOB225 Circuit Breaker 25A 2 Pole 120/240V AC

SKU CH-09MP-33DQ2

Two-pole 25 A miniature breaker rated 120/240 V AC and 48 V DC with 10 kA interrupting capacity, bolt-on mounting for QO load centres

  • 25 A rating protects 120/240 V circuits reliably
  • 10 kA interrupting rating clears faults safely
  • Bolt-on mounting fits QO load centres directly
  • Pressure-plate terminals accept wire without special tools
  • Compact 3 × 1.5 × 2.9 in frame saves panel space

25 A QOB Bolt-On Breaker

The Square D QOB225 is a 25 A two-pole miniature circuit breaker rated for 120/240 V AC and 48 V DC. It belongs to the QO series and uses a bolt-on mounting style with a paddle actuator. Designed for single-phase QO load centres and NQOD panelboards, it fits a 100 A frame size.

10 kA AIR Rating at 120/240 V

The interrupting capacity is 10 kA at the rated AC voltage. This single figure determines whether the breaker can safely clear a fault in the panelboard where it will be installed. Verify that the available fault current at the point of installation does not exceed this rating.

Bolt-On Mount with Pressure-Plate Terminals

Installation requires bolting the breaker directly to the QO bus and securing conductors under the pressure-plate terminals. The most common issue is using a plug-on panel instead of a bolt-on bus, which prevents the breaker from seating correctly. Ensure the panelboard series matches the QOB designation before starting.

Highlights

  • 25 A rating protects 120/240 V circuits reliably
  • 10 kA interrupting rating clears faults safely
  • Bolt-on mounting fits QO load centres directly
  • Pressure-plate terminals accept wire without special tools
  • Compact 3 × 1.5 × 2.9 in frame saves panel space

Specifications

BrandSQUARE D

Questions about this item

How much current will the 25 A rating actually carry in a panel?

The breaker is rated to carry 25 A continuously in a Square D QO load centre at 120/240 V AC.

What does the 10 kA AIR rating limit on this breaker?

It limits the maximum prospective short-circuit current the breaker can safely interrupt to 10 kA at 120/240 V AC.

Will the 3 in by 1.5 in bolt-on frame fit my QO panelboard?

Yes, the 100 A frame size and bolt-on mounting are designed for Square D QO and NQOD panelboards.

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