Square D Q1B280 Molded Case Circuit Breaker
- 80A
- 2 Pole
- Bolt-On
Quantity
Square D Q1B280 - 80A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Part of Square D's legacy Q1B series, the Q1B280 is a 2-pole, 80A molded case circuit breaker designed for commercial and industrial applications. It utilizes thermal-magnetic trip technology to provide dependable long-time and instantaneous overcurrent protection. This bolt-on breaker installs into older NQOB panelboards. For modern replacements, the QOB280 can be used when paired with the SK5668 mounting kit.Specifications
| Brand | Square D |
|---|---|
| Part Number | Q1B280 |
| Series | Q1B |
| Amperage | 80A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | Q1B |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Square D NQOB Panelboards |
| Wire Gauge | #4-2/0 AWG |
| Max Wire | 2/0 AWG |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
4 answersWhich panelboards are compatible with the Square D Q1B280 circuit breaker?
The Q1B280 is a bolt-on circuit breaker designed specifically for installation in legacy Square D NQO and NQOB panelboards.
Is the Square D Q1B series obsolete, and what is the replacement?
Yes, the Q1B series is obsolete and has been replaced by the QOB series. To install a modern QOB circuit breaker in an older NQO or NQOB panelboard, you must use an SK5668 horizontal bus bar mounting assembly.
What wire gauge range is accepted by the terminals on the Q1B280?
The box lugs on this breaker accommodate wire sizes ranging from #4 AWG to 2/0 AWG.
What does the LI trip function code mean on the Q1B280?
The LI designation indicates that the breaker uses a thermal-magnetic trip unit equipped with fixed long-time and instantaneous trip functions to protect against overloads and short circuits.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- MCMichael C.ReviewingSquare D Q1B3100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/11/22Fast Service.
Fast Service.