Siemens B34000S01 - 40 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens B34000S01 — a 40A, 240V, 3-pole bolt-on molded case circuit breaker engineered for dependable branch-circuit protection in panelboards and load centers. Built to perform in demanding environments, it combines robust mechanical mounting with precise electrical protection for residential, commercial, and light industrial applications.

• Bolt-on mounting — secure, vibration-resistant bus connection for consistent electrical contact and long-term reliability.
• Thermal-magnetic trip unit — provides stable, repeatable protection across temperature changes and varying load conditions, reducing nuisance trips.
• OEM-compatible — designed to integrate seamlessly with matching Siemens panelboards and load centers for a clean, code-compliant installation.
• Three-pole configuration — ideal for protecting three-phase circuits and distributing power in multi-wire systems where balanced protection is essential.
• Versatile across environments — suited for home renovation projects, commercial electrical rooms, and light industrial installations where reliable branch-circuit protection matters.

Technical specifications

• Manufacturer: Siemens
• Part number: B34000S01
• 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

Ideal use cases

• Protecting branch circuits in new or existing Siemens panelboards and load centers.
• Upgrading or replacing faulty or worn breakers in residential, commercial, and light industrial setups.
• Feeding three-phase equipment or equipment banks that require balanced protection across all phases.
• Situations where a secure bolt-on connection minimizes vibration-induced wear and maintains reliable circuit protection.

Installation and optimization tips

• Install only in compatible Siemens panelboards or load centers to ensure proper fit and trip coordination.
• Follow manufacturer torque recommendations when securing the bolt-on connection to prevent loosening and arcing.
• Use the 3-pole design to protect all phases of a three-phase circuit and maintain system balance.
• Periodically inspect for signs of overheating or wear; replace if the trip unit shows degraded performance or physical damage.

Choose the Siemens B34000S01 for dependable, code-compliant protection that aligns with Siemens OEM panels, delivering precise overcurrent and short-circuit protection where it matters most—your electrical distribution system.