Siemens bf240 a - 40 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Siemens bf240a is a 40 A, 240 V, 2-pole bolt-on molded case circuit breaker designed to safeguard branch circuits in panelboards and loadcenters. Built for dependable overcurrent and short-circuit protection, this unit combines rugged mounting with precise protection curves, making it a reliable choice for diverse electrical setups from homes to light commercial spaces.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection that stays tight in demanding environments.
• Thermal-magnetic trip unit delivers stable, repeatable protection by handling both sustained overloads and instantaneous short circuits with predictable response.
• OEM-compatible design works with matching Siemens panelboards and loadcenters, ensuring a clean, integrated protection solution.
• Versatile applications suitable for residential, commercial, and light industrial circuits requiring reliable 2-pole 240 V protection.
• Durable molded-case construction built to withstand routine electrical demand and maintain reliable performance over time.

Technical specifications

• Manufacturer: Siemens
• Part number: bf240a
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 40 A
• Voltage rating: 240 V
• Number of poles: 2
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

Use the bf240a to protect feeder and branch circuits in residential panelboards and commercial load centers where compact, reliable 2-pole 240 V protection is needed. It’s well-suited for circuits powering outlets, lighting, and small equipment in spaces subject to vibration or movement, such as basements, garages, or light industrial environments. When paired with compatible Siemens panel infrastructure, it provides a cohesive, code-compliant protection strategy from the service panel outward.

Why choose this Siemens 40 A breaker

Beyond just meeting the electrical requirements, the bf240a offers a protection solution designed for longevity and consistency. The bolt-on mounting ensures a secure connection that resists loosening from vibration, while the thermal-magnetic trip unit delivers crisp, predictable trips that help minimize nuisance actuations and protect wiring and devices downline. Ideal for installers seeking a dependable, OEM-aligned component that complements Siemens panelboards and load centers with a proven track record.

Incorporate the Siemens bf240a into your electrical enclosure to achieve robust branch-circuit protection, straightforward installation, and harmonious compatibility with existing Siemens equipment. A thoughtful choice for when reliability and compatibility matter most.