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Square D QO series two-pole GFCI breaker, 30 A, plug-in mount, grey plastic housing

SQUARE D

SQUARE D QO230GFI 30A 2 Pole 120/240V Circuit Breaker

SKU CH-B3Q9-1TS62

A 30 A two-pole ground-fault circuit interrupter rated 120/240 V AC and 48 V DC with a 10 kA interrupting rating for QO load centres

  • Ground-fault protection trips at 5 mA for personnel safety
  • 30 A two-pole design handles 120/240 V AC loads
  • 10 kA interrupting rating clears high fault currents
  • Plug-in mounting fits QO and NQ load centres directly
  • Pressure-plate terminals accept wire without special tools

Ground-Fault Protection for 30 A Circuits

This Square D QO230GFI is a Class A ground-fault circuit interrupter rated at 30 amps and 120/240 V AC. It trips at a 5 mA leakage threshold to protect people from shock hazards. The two-pole design suits branch circuits that need both legs of a split-phase supply. It fits QO and NQ load centres using a plug-in mounting style.

Interrupting Capacity and Voltage Limits

The breaker carries a maximum AIR rating of 10 kA at 120/240 V AC, which defines the highest prospective fault current it can safely clear. It is also rated for 48 V DC, allowing use on certain low-voltage DC circuits. The 100 A frame size sets the physical envelope for the device within the panel. No other voltage or interrupting ratings apply to this model.

Plug-In Mounting and Pressure-Plate Terminals

A plug-in mounting style lets the breaker snap onto the panel bus without bolts, speeding installation and removal. Pressure-plate terminals accept conductors directly, securing them with a screw-down plate rather than a lug. The paddle actuator provides a clear visual indication of the on, off, or tripped position. The 4.1 in length determines the slot space required in the load centre.

How it compares

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

Price $157.99
Pricier than about 79% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSQUARE D

Questions about this item

Should I pick the 30 A two-pole version or a different amperage for my QO load center?

Choose the 30 A two-pole model when the branch circuit is rated for 30 A; other QO breakers carry different amp ratings and pole counts, so match the breaker to the circuit design.

What does the 5 mA Class A ground-fault rating mean once the breaker is installed?

It trips the breaker when leakage to ground exceeds 5 mA, providing personnel-level shock protection on the protected 120/240 V circuit.

Will the 10 kA interrupting rating at 120/240 V AC limit the fault current my panel can handle?

The breaker safely interrupts up to 10 kA at 120/240 V AC; the panel’s own short-circuit rating must be equal to or higher than that value.

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