Siemens BQ3B040H - 40 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens BQ3B040H — a reliable 40A, 240V, 3-pole bolt-on molded case circuit breaker designed to protect your electrical systems with precision. Built for dependable branch circuit overcurrent and short-circuit protection, it’s a smart choice for modern panelboards and load centers.

• Secure bolt-on mounting for a rigid, vibration-resistant bus connection that stays solid even in environments with movement or vibration.
• Thermal-magnetic trip unit delivers stable, repeatable protection by responding to both overloads and short circuits, reducing nuisance trips and maintaining consistent performance.
• OEM panel compatibility engineered to pair seamlessly with matching Siemens panels and load centers, ensuring a clean, reliable fit and straightforward installation.
• Versatile application suitable for residential, commercial, and light industrial electrical distributions — ideal for protecting three-phase branch circuits and 240V loads.

The BQ3B040H is a three-pole breaker rated at 40 amperes, offering robust protection for circuits that require multi-pole interrupting capability. Its bolt-on design simplifies installation and maintenance in panelboards and load centers, helping electricians and facility managers keep critical systems safe and compliant.

Where to use

• Residential settings with multi-pole 240V circuits requiring solid, vibration-resistant protection
• Commercial environments with panelboards that demand dependable branch circuit protection for 3-pole configurations
• Light industrial installations where stable performance and quick field replacement matter

Technical snapshot

• Manufacturer: Siemens
• Part Number: BQ3B040H
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Voltage Rating: 240V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Choose the Siemens BQ3B040H when you need a dependable, well-supported solution that aligns with Siemens OEM panels, delivers consistent protection, and stands up to the demands of residential, commercial, and light industrial power layouts. For a cohesive electrical ecosystem, pairing this 3-pole bolt-on breaker with the right panelboard ensures optimal performance and long-term reliability.