Square D QH320 Miniature Circuit Breaker
- 20A
- 3 Pole
- Plug-On
Quantity
Square D QH320 - 20A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Delivering robust 65kAIC high-interrupting capacity, this 20A plug-on component serves demanding commercial and industrial applications. It integrates seamlessly into standard QO load centers, NQ panelboards, and Speed-D switchboards. The thermal-magnetic trip mechanism includes Square D's signature Visi-Trip visual indicator. This feature allows maintenance personnel to quickly spot tripped circuits. This three-pole unit carries an HACR rating for heating and cooling equipment compatibility.Specifications
| Brand | Square D |
|---|---|
| Series | QH |
| Amperage | 20A |
| 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
6 answersWhat panelboards and load centers are compatible with the QH320 circuit breaker?
The QH320 is a plug-on breaker designed for use in Square D QO load centers, NQ panelboards, and Speed-D switchboard distribution panels. It is not compatible with Homeline panels or bolt-on NQOB interiors.
What does the QH series designation mean compared to standard QO breakers?
The QH series indicates a high interrupting rating. The QH320 provides a 65kAIC rating at 120/240VAC, which is significantly higher than the 10kAIC of standard QO breakers or the 22kAIC of QO-VH breakers. This makes it suitable for commercial and industrial applications with high available fault currents.
Is there a bolt-on equivalent for the QH320?
Yes, if your application requires a bolt-on connection for an NQ or NQOB panelboard, you will need the QHB320. The QH320 is strictly a plug-on breaker.
Does the QH320 feature the Visi-Trip indicator?
Yes, like most breakers in the QO family, the QH320 includes the Square D Visi-Trip indicator. When the breaker trips, a highly visible red indicator appears in the window, allowing maintenance personnel to quickly identify the tripped circuit in a crowded panel.
Is the QH320 suitable for use with HVAC equipment?
Yes, the QH320 is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment that requires HACR type circuit breakers.
How much panel space does the QH320 require?
As a 3-pole QO family breaker, the QH320 requires three standard 3/4-inch spaces in a compatible load center or panelboard.
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