Siemens B280H - 70 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Siemens B280H is a 70A, 240V, 2-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for durability in residential, commercial, and light industrial environments, this unit combines precise protection with rugged mounting for reliable performance over time.

• Secure bolt-on mounting: a rigid bus connection that resists vibration and reduces loosening risks in demanding installations.
• Thermal-magnetic trip unit: provides stable, repeatable protection by reacting to both sustained overloads and short-circuit events, even as ambient temperatures change.
• OEM-compatible design: engineered to pair seamlessly with matching Siemens OEM load centers and panelboards for a clean, reliable integration.
• Two-pole protection: ensures simultaneous disconnection of both conductors, enhancing safety and circuit reliability.
• Molded case construction: a compact, durable housing that stands up to everyday electrical demand while delivering effective arc quenching and insulation.

Where and how you’ll use the Siemens B280H

Ideal for new installations or upgrades in panelboards and load centers where robust protection is required. Use cases include branch circuit protection for lighting, receptacles, HVAC controls, and other essential circuits in homes, small offices, retail spaces, and light industrial settings. The B280H is well-suited for installations where vibration or mechanical stress is a consideration, thanks to its secure bolt-on mounting.

Technical snapshot

• Manufacturer: Siemens
• Part Number: B280H
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 70A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Why this matters

Choosing the Siemens B280H means selecting a protection device that not only meets standard electrical codes but also emphasizes dependable performance in real-world conditions. The combination of a thermal-magnetic trip, solid bolt-on mounting, and seamless OEM compatibility translates to fewer trip anomalies, quicker servicing, and clearer, more predictable protective behavior for your panelboard or load center.

Practical tips for installers and specifiers

• Match the B280H with compatible Siemens panelboards to ensure correct bus bar alignment and reliable clamping.
• Consider the thermal-magnetic trip characteristics when sizing for diversity factors and typical load profiles in the target space.
• In environments with noticeable vibration or movement, rely on the bolt-on mounting to maintain an uninterrupted electrical connection over time.
• Document the 70A rating and 240V supply in your electrical plans to align with downstream protection coordination and breaker tripping thresholds.