Overview
The Square D QOB280 is an 80 A, 120/240 VAC, two-pole thermal-magnetic circuit breaker with bolt-on mounting for compatible QOB panelboards. It provides common-trip overcurrent protection and a 10 kA interrupting rating.
Key Features
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Protection: A fixed thermal-magnetic trip responds to sustained overloads and high-current short circuits, while the two-pole common-trip mechanism disconnects both ungrounded conductors together.
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Installation: Bolt-on bus mounting and box-lug terminals provide a secure connection in listed QOB panelboard applications.
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Compatibility: Use only in Square D panelboards and enclosures labeled for the QOB breaker family; verify enclosure, bus and series compatibility.
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Performance: Rated 80 A, 2 poles, 120/240 VAC and 10 kAIC for single-phase feeder and equipment circuits.
Specifications
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Model: Square D QOB280
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Electrical rating: 80 A, 2 poles, 1 phase, 120/240 VAC
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Interrupting rating: 10 kAIC
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Mounting and connection: QOB bolt-on with box lugs
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Conductor range: 4 AWG through 2/0 AWG
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Temperature and certifications: 40°C ambient rating; UL Listed; CSA certified; HACR rated
Common Applications
- Two-pole feeders and subpanel circuits in compatible QOB panelboards.
- Large residential or light-commercial equipment loads requiring an 80 A common-trip breaker.
- Exact-model service replacement where QOB280 is specified.
