Square D QH330 Miniature Circuit Breaker
- 30A
- 3 Pole
- Plug-On
Quantity
Square D QH330 - 30A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Built for heavy-duty commercial environments, this 30A three-pole component offers an elevated 65kAIC rating for systems requiring higher fault current protection. It snaps securely into Square D QO load centers and NQ panelboards. The unit utilizes proven thermal-magnetic trip technology to guard against overloads and short circuits. Facility managers benefit from the integrated Visi-Trip flag. This high-visibility feature simplifies troubleshooting by clearly marking tripped status.Specifications
| Brand | Square D |
|---|---|
| Series | QH |
| Amperage | 30A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 120VAC, 240VAC, 120/240VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 120VAC, 65kA @ 240VAC, 65kA @ 120/240VAC |
| Terminal Type | Pressure Plate |
|---|---|
| For Use With | QO Load Centers, NQ Panelboards, Speed-D Switchboards |
| Wire Gauge | 14-8 AWG (Al/Cu) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, Federal Specification W-C-375B/GEN, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, RoHS, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Visual Trip Indicator, High Interrupting Capacity, Common Trip |
Product FAQs
8 answersWhich panelboards and load centers are compatible with the QH330?
This plug-on breaker is designed for use in Square D QO load centers, NQ panelboards, and Speed-D switchboards. It requires three standard three-quarter inch spaces for installation.
Can the QH330 replace a standard QO330 breaker?
Yes. The QH330 shares the same physical dimensions and plug-on mounting style as the standard QO330. It is often used as a direct upgrade when a higher 65kAIC interrupting rating is required by the electrical system design.
What is the difference between the QO and QH series breakers?
The primary difference is the short circuit interrupting rating. Standard QO breakers typically offer 10kAIC, while the QH series provides a much higher 65kAIC rating for commercial or industrial applications with higher available fault currents.
How much panel space does this 3-pole breaker require?
It requires three adjacent spaces in a compatible QO or NQ series panel. Each pole occupies one standard three-quarter inch space.
What type of wire connections does this breaker use?
It features pressure plate terminals that accept either copper or aluminum wiring. The terminals are rated for wire sizes ranging from 14 AWG to 8 AWG.
Does this breaker include Visi-Trip technology?
Yes. Like most breakers in the QO family, it features the Square D Visi-Trip indicator. When the breaker trips, a highly visible red indicator appears in the window to help quickly identify the tripped circuit.
What trip functions are included in the QH330?
This thermal magnetic breaker features fixed long-time and instantaneous (LI) trip functions to protect against both sustained overloads and sudden short circuits.
Is the QH330 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 motor group combination protection.
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