Siemens B240GF - 40 A, 240 V Circuit Breaker | AmpState

The Siemens B240GF—40A, 240V molded case circuit breaker—delivers dependable overcurrent and short-circuit protection for branch circuits in panelboards and loadcenters. Engineered for real-world electrical demands, this unit combines a compact molded case design with a trusted thermal-magnetic trip mechanism to provide reliable, repeatable protection when you need it most.

Why this breaker stands out

• Space-efficient design: The compact molded case format makes efficient use of panel space, helping you maximize panel capacity without compromising protection.
• Stable protection: A thermal-magnetic trip unit delivers consistent protection across a range of loads and ambient conditions, reducing nuisance trips while still clearing faults quickly.
• OEM-ready compatibility: Specifically designed to be used with matching Siemens OEM load centers and panelboards for straightforward installation and reliable operation.
• Versatile for multiple environments: Suitable for residential, commercial, and light industrial applications, wherever dependable branch-circuit protection is required.

Key specifications at a glance

• Manufacturer: Siemens
• Part Number: B240GF
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Voltage Rating: 240V
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

Use the Siemens B240GF to protect individual branch circuits within residential panels upgrading to 40A loads, or to support lighting, receptacle, or small motor circuits in commercial and light industrial settings. Its compatibility with Siemens panel line ensures a cohesive, maintainable electrical distribution system, making service and future upgrades smoother.

Practical installation and workflow insights

When integrating the B240GF, verify that the panelboard or loadcenter is compatible with Siemens molded case breakers and follow the manufacturer’s torque specifications for terminal connections. This breaker is designed to slot into compatible Siemens assemblies, enabling clean fault-clearance performance and a cohesive protection scheme across your electrical distribution board.

In short, the Siemens B240GF (40A, 240V) is a purpose-built solution for reliable branch-circuit protection in modern panels. If you’re upgrading, retrofitting, or designing a new distribution system in a home, business, or light industrial context, this molded case breaker delivers precise protection, panel-space efficiency, and seamless OEM compatibility.