Siemens B280 - 80 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Siemens B280 - 80A, 240V, 2-pole bolt-on molded case circuit breaker from AmpState delivers dependable branch circuit overcurrent and short-circuit protection for panelboards and load centers. Built to stay secure in environments with vibration, its bolt-on mounting creates a rigid bus connection that stands up to demanding residential, commercial, and light industrial settings.

Why this breaker stands out

• Secure bolt-on mounting: A rigid connection to the bus bars minimizes movement and vibration, helping maintain consistent protection and reducing nuisance trips in panels subject to steady vibration.
• Thermal-magnetic trip unit: Combines thermal and magnetic trip mechanisms for stable, repeatable protection. It responds to both gradual overloads and instantaneous short circuits, safeguarding wiring and connected equipment.
• OEM compatibility: Designed to work with matching Siemens OEM load centers and panelboards, ensuring seamless integration and reliable performance in standard electrical assemblies.
• Versatile application: Ideal for residential, commercial, and light industrial circuits where robust, code-compliant overcurrent protection is essential.

Ideal use cases

Replace aging or undersized breakers in existing Siemens panelboards, or outfit new installations that require a dedicated 80A 240V protection solution. Use it for main feeders or branch circuit protection in garages, workshops, small offices, and utility rooms where a stable, two-pole 240V breaker is needed.

Specifications at a glance

• Manufacturer: Siemens
• Part Number: B280
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 80A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical guidance for installation and operation

Install as part of a compatible Siemens panelboard or load center to ensure optimal performance. The bolt-on design simplifies mounting and provides a solid, vibration-resistant connection, which is especially beneficial in environments with mechanical motion or motor-driven loads. Verify that your panelboard is designed for molded case, 2-pole, 80A devices and follow all OEM installation instructions for torque and clearance to maintain safe, code-compliant operation.