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Square D QO115EPD 15 A plug-in breaker, light-grey plastic body, black toggle switch, silver terminals

SQUARE D

SQUARE D QO115EPD 15 A 120 V AC Ground Fault Equipment Protection 30 mA 1 Pole Plug In

SKU CH-YK0F-S8S78

A 15 A single-pole plug-in breaker provides 30 mA ground-fault equipment protection for 120 V AC QO load centres and NQ panelboards

  • TypeCircuit Breakers
  • Ground-fault protection at 30 mA trips fast to limit shock risk
  • 15 A single-pole rating fits standard 120 V branch circuits
  • Plug-in mounting installs directly in QO and NQ load centres
  • 10 kA interrupting capacity clears high fault currents safely
  • Compact 3.0 in by 0.75 in frame saves panel space

Application fit

The Square D QO115EPD is a 15 A, single-pole plug-in breaker that provides 30 mA ground-fault equipment protection on 120 V AC circuits. It is intended for installers and facility managers who need personnel-level ground-fault detection on branch circuits fed from compatible QO or NQ load centres. It is not suited for applications that require standard overcurrent protection without ground-fault sensing or for panels that do not accept the QO plug-in form factor.

Interface limits

The breaker mounts by plugging directly into Square D QO or NQ panelboards, using a pressure-plate terminal for the load conductor. Its interrupting rating is 10 kA at 120 V AC, so it must only be installed where the available fault current does not exceed that value. The device also carries a 48 V DC rating, but the ground-fault function is specified for AC use. No other mounting styles or panelboard series are supported.

Capacity and headroom

The 15 A thermal rating sets the continuous load limit for the protected circuit, while the 30 mA trip threshold defines the ground-fault sensitivity. The 100 A frame size indicates the physical envelope within the QO lineup, not the circuit capacity. Headroom ends at the 15 A handle rating or the 10 kA interrupting ceiling, whichever is reached first in a given installation.

Highlights

  • Ground-fault protection at 30 mA trips fast to limit shock risk
  • 15 A single-pole rating fits standard 120 V branch circuits
  • Plug-in mounting installs directly in QO and NQ load centres
  • 10 kA interrupting capacity clears high fault currents safely
  • Compact 3.0 in by 0.75 in frame saves panel space

Specifications

BrandSquare D
ModelQO115EPD
TypeCircuit Breakers

Questions about this item

Should I choose the 15 A or a different amperage for my 120 V circuit?

Select the 15 A version when the branch circuit is rated for 15 amperes; the breaker matches that load limit and the 120 V AC rating of the QO panel.

What does the 30 mA ground-fault rating mean once the breaker is installed?

It will trip at 30 milliamperes of leakage current, providing equipment-level ground-fault protection rather than personnel protection.

Does the plug-in mounting work with any panel, or only QO and NQ series?

The plug-in design is keyed for Square D QO load centers and NQ panelboards; it will not seat in other manufacturers' bus bars.

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