Eaton / Cutler-Hammer QBH240 Miniature Circuit Breaker
- 40A
- 2 Pole
- Bolt-On
Quantity
Eaton / Cutler-Hammer QBH240 - 40A 2 Pole Miniature Circuit Breaker
New
Quantity
Description
Designed specifically for demanding HVAC applications, this 40-amp protective device provides reliable overcurrent defense. The unit is fully HACR rated to accommodate motor starting surges without nuisance tripping. Maintenance professionals can easily integrate this component into existing infrastructure. It mounts firmly into legacy Commander B/BC, CEB, and Sylvania bolt-on enclosures.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | QBH |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | QBH |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Commander B/BC Load Centers, CEB Load Centers, Sylvania Bolt-On Load Centers |
| Wire Gauge | 10-2 AWG (Cu), 10-1 AWG (Al) |
| Max Wire | 2 AWG |
| Min Wire | 10 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Common Trip, Non-Interchangeable Trip, Quick-Make/Quick-Break |
Product FAQs
5 answersWhich load centers are compatible with the QBH240 circuit breaker?
The QBH240 is designed to fit classic CEB, Sylvania, and Commander Electric bolt-on load centers, specifically B and BC type panels. It is not compatible with Eaton Type BR or standard plug-on panels.
Is the Eaton QBH240 breaker HACR rated?
Yes, the QBH240 is HACR rated, making it suitable for protecting heating, air conditioning, and refrigeration equipment that requires this specific designation.
What is the physical width of the QBH240 breaker?
The QBH240 features a 3/4-inch per pole form factor. As a 2-pole breaker, it requires two 3/4-inch spaces, occupying a total of 1.5 inches on the panel bus.
Can the QBH240 replace older Commander or Sylvania breakers?
Yes, Eaton manufactures the QBH240 as a direct aftermarket replacement for vintage CEB, Sylvania, and Commander bolt-on circuit breakers of the same amperage and pole configuration.
Are there alternate part numbers for the QBH240?
Yes, this breaker is frequently listed by distributors under alternate part numbers such as QHB240 or QHB-240, though QBH240 is the official Eaton catalog number.
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