Square D QOH240 Miniature Circuit Breaker
- 40A
- 2 Pole
- Plug-On
Quantity
Square D QOH240 - 40A 2 Pole Miniature Circuit Breaker
New
Quantity
Description
Rated for 40 amps at 120/240V, this thermal-magnetic breaker delivers enhanced 42kA short-circuit protection for dedicated residential and commercial loads like ranges or HVAC equipment. The plug-on design installs easily into Square D QO load centers, NQ panelboards, and compatible enclosures without requiring specialized tools. A built-in Visi-Trip window displays a bright red flag upon tripping, streamlining troubleshooting and minimizing downtime during electrical faults.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOH240 |
| Series | QOH |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 42kA @ 120/240VAC |
| Frame Type | QOH |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | NQ Panelboards, NQOD Panelboards, QO Load Centers, Speed-D Switchboards |
| Wire Gauge | 8-2 AWG (Al/Cu) |
| Max Wire | 2 AWG |
| Min Wire | 8 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, 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
5 answersWhat is the difference between the QOH240 and the standard QO240?
The QOH240 is the high-interrupting version of the standard QO240. While they share the same physical footprint and plug-on mounting, the QOH240 offers a 42kAIC rating at 120/240VAC, whereas the standard QO240 is rated for 10kAIC.
Will the QOH240 fit in a Square D Homeline panel?
No, QO and QOH series breakers are not interchangeable with Homeline breakers. The QOH240 is designed exclusively for QO load centers, NQ or NQOD panelboards, and Speed-D switchboards.
Can I use the QOH240 as a direct replacement for an existing QO240?
Yes, the QOH240 can directly replace a standard QO240. It provides the same thermal-magnetic protection but adds a higher short-circuit interrupting capacity, which is often required in commercial applications or areas with high available fault current.
Does the QOH240 include a visual trip indicator?
Yes, this breaker features the Square D Visi-Trip indicator. When the breaker trips due to an overcurrent or short circuit, a red indicator appears in a small window on the face of the breaker, making it easy to spot in a crowded panel.
Is the QOH240 a GFCI or AFCI breaker?
No, the QOH240 is a standard thermal-magnetic circuit breaker. It provides long-time and instantaneous trip functions for overload and short-circuit protection, but it does not offer ground-fault or arc-fault protection.
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