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Square D QHB220 Miniature Circuit Breaker
- 20A
- 2 Pole
- Bolt-On
Square D
QHB220
Miniature Circuit Breaker
Brand
Square D
SKU
QHB220
Quantity
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Square D QHB220 - 20A 2 Pole Miniature Circuit Breaker
New
Quantity
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Description
Part of the QO family, the Square D QHB220 delivers 20 amps of thermal-magnetic protection for commercial systems. This two-pole device is engineered for high-fault environments, offering a robust 65 kAIC interrupting capacity at 120/240VAC. The unit installs into Square D NQ panelboards using a secure bolt-on connection. It accepts 14-8 AWG wiring via pressure plate terminals. Equipped with a Visi-Trip indicator, the breaker displays a red flag when tripped to reduce downtime.Specifications
| Brand | Square D |
|---|---|
| Part Number | QHB220 |
| Series | QHB |
| Amperage | 20A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 65kA @ 120/240VAC |
| Frame Type | QOB |
|---|---|
| Terminal Type | Pressure Plate |
| For Use With | NQ Panelboards |
| 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 |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, Visual Trip Indicator, Common Trip, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
6 answersWhat panelboards are compatible with the QHB220 circuit breaker?
The QHB220 is designed for use in Square D NQ and legacy NQOD panelboards. It utilizes a bolt-on connection that secures directly to the panel bus.
Can I install the QHB220 in a standard QO load center?
No. The QHB220 is a bolt-on breaker designed specifically for commercial panelboards. It cannot be used in standard residential QO load centers, which require plug-on breakers.
Can I use the QHB220 to replace a standard QOB220 breaker?
Yes. The QHB220 shares the same physical dimensions and bolt-on mounting as the QOB220, but offers a significantly higher interrupting rating (65kAIC versus 10kAIC). It is a direct upgrade for systems requiring higher fault current protection.
What is the recommended tightening torque for the QHB220 wire terminals?
The pressure plate terminals on the QHB220 should be torqued to 40.7 lb-in (4.6 N.m) when securing the 14-8 AWG copper or aluminum conductors.
Is the QHB220 suitable for use with HVAC equipment?
Yes, this breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment that requires this specific safety designation.
How does the QHB220 indicate a tripped condition?
This breaker features Square D Visi-Trip technology. When the breaker trips due to an overcurrent or short circuit, the handle moves to a center position and a highly visible red indicator flag appears in the breaker window.
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