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Siemens B280HH Miniature Circuit Breaker
- 80A
- 2 Pole
- Bolt-On
Siemens
B280HH
Miniature Circuit Breaker
Brand
Siemens
SKU
B280HH
Quantity
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Siemens B280HH - 80A 2 Pole Miniature Circuit Breaker
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Description
Built for heavy-duty commercial applications, this high-interrupting miniature circuit breaker provides robust overcurrent protection. It utilizes proven thermal-magnetic technology to deliver precise long-time and instantaneous fault response. The bolt-on configuration ensures a rigid connection when installed into Siemens P1 through P5 panelboards. It includes load-side lugs for quick wiring. With a powerful 65kAIC rating at 120/240V, it safely clears severe short circuits.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B280HH |
| Series | B |
| Amperage | 80A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 65kA @ 120/240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 4-1/0 AWG (Cu), 2-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG (Cu), 2 AWG (Al) |
| 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, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Common Trip, Non-Interchangeable Trip |
Product FAQs
8 answersWhich Siemens panelboards accept the B280HH circuit breaker?
It is designed for bolt-on installation in Siemens P1, P2, P3, P4, and P5 commercial panelboards.
What breaker type or frame does the B280HH belong to?
The B280HH is a Type HBL molded case circuit breaker. The HBL designation indicates its high-interrupting 65kAIC rating for bolt-on applications.
What wire sizes are approved for the lugs on this breaker?
The load-side lugs accept 4 AWG to 1/0 AWG copper conductors, or 2 AWG to 1/0 AWG aluminum conductors.
Does this breaker provide adjustable trip settings?
No, the B280HH features a fixed thermal-magnetic trip unit with factory-set long-time and instantaneous protection.
How does the B280HH mount into the panelboard?
It utilizes a bolt-on connection, requiring it to be physically bolted to the panelboard bus. This provides a secure, vibration-resistant connection for commercial and industrial environments.
What does the LI trip function code mean on this breaker?
LI stands for Long-Time and Instantaneous. The long-time function protects against sustained overloads, while the instantaneous function trips immediately during a short circuit.
Can I install this 2-pole breaker in a 3-phase panelboard?
Yes, it can be installed in 3-phase Siemens P1 through P5 panelboards to supply 240V single-phase loads, provided the panel interior is configured to accept bolt-on branch breakers.
Is the B280HH suitable for high fault current applications?
Yes, with a 65kAIC interrupting rating at 120/240V, it is specifically designed to safely clear severe short circuits in commercial systems with high available fault current.
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