Square D QOH2125 Miniature Circuit Breaker
- 125A
- 2 Pole
- Plug-On
Quantity
Square D QOH2125 - 125A 2 Pole Miniature Circuit Breaker
New
Quantity
Description
Supplying 125 amps of high-capacity power, this two-pole miniature breaker is built to manage substantial electrical loads while offering an upgraded 42kA interrupting rating. The device is fully compatible with Square D QO load centers and NQOD panelboards, making it ideal for main breaker applications or large subpanel feeds. Integrated Visi-Trip technology provides a highly visible red indicator flag, ensuring maintenance personnel can spot tripped circuits instantly.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOH2125 |
| Series | QOH |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 42kA @ 120/240VAC |
| Frame Type | QO |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | NQ Panelboards, NQOD Panelboards, QO Load Centers, Speed-D Switchboards |
| Wire Gauge | 4 AWG-2/0 AWG (Al/Cu) |
| Max Wire | 2/0 AWG |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, Federal Specification W-C-375B/GEN, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, High Interrupting Capacity, Common Trip, Trip-Free Mechanism, Quick-Make/Quick-Break, RoHS Compliant |
Product FAQs
6 answersCan I install the QOH2125 in a Square D Homeline load center?
No. Square D QO and Homeline circuit breakers have different mounting configurations and are not interchangeable. The QOH2125 is designed exclusively for QO load centers, NQ or NQOD panelboards, and Speed-D switchboards.
What does the "H" in the QOH2125 catalog number indicate?
The "H" designates a high interrupting rating. While a standard QO breaker typically offers a 10 kAIC rating, the QOH series provides a 42 kAIC rating at 120/240VAC for commercial or industrial applications requiring higher fault current protection.
How many panel spaces does the QOH2125 require?
This 2-pole miniature circuit breaker requires two standard 3/4-inch spaces in a compatible QO load center or panelboard.
Is the QOH2125 suitable for HVAC equipment?
Yes, this breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment that requires a breaker with this specific safety designation.
Does the QOH2125 feature a tripped circuit indicator?
Yes, it includes the Square D Visi-Trip indicator. When the breaker trips due to an overcurrent or short circuit, the handle moves to a center position and a red indicator window appears, allowing you to quickly identify the tripped breaker in a crowded panel.
What is the difference between the QO2125 and the QOH2125?
Both are 125A, 2-pole plug-on breakers for the QO series, but they differ in their short-circuit interrupting capacity. The standard QO2125 is rated at 10 kAIC, while the QOH2125 is rated at 42 kAIC for systems with higher available fault currents.
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