Siemens B240HH - 40 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens B240HH, a 40A, 240V, 2-pole bolt-on molded case circuit breaker engineered for dependable branch circuit protection in panelboards and load centers. Built to endure the demands of everyday electrical systems, it delivers consistent performance across residential, commercial, and light industrial applications.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection for long-term reliability in enclosures and panels.
• Thermal-magnetic trip unit offers stable, repeatable protection by responding to both sustained overcurrent and short-circuit conditions, helping prevent nuisance trips and equipment damage.
• 2-pole design ensures simultaneous disconnection of both conductors, enhancing safety and protecting shared loads common in multi-wire circuits.
• Compatibility with matching OEM load centers and panelboards means straightforward replacement and verified electrical performance within established systems.
• Versatile use suited for residential panels, commercial distribution boards, and light industrial installations requiring reliable overcurrent and short-circuit protection.

Why this breaker matters in real-world setups

When you’re wiring or upgrading a panel, the B240HH helps you specify a component that aligns with Siemens’ ecosystem, reducing compatibility risks. The bolt-on mounting minimizes bus connection issues caused by vibration or improper seating, while the thermal-magnetic trip unit balances fast response with dependable protection, minimizing downtime and service calls.

Practical applications and use cases

• Home electrical panels where a dedicated 40A circuit protects feeders or heavy-load circuits such as EV charging, water heaters, or HVAC accessories.
• Commercial distribution boards that require a robust, easy-to-service 2-pole breaker for office or storefront equipment circuits.
• Light industrial layouts with moderate-duty machinery or receptacle banks needing reliable branch-circuit protection.

Technical snapshot

• Manufacturer: Siemens
• Part Number: B240HH
• 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

For installers and facilities managers seeking reliability, straightforward maintenance, and a seamless fit within Siemens panel ecosystems, the B240HH is a practical, next-step choice that supports safe, efficient electrical distribution across a range of environments.