Siemens LGB2B040B - 40 A, 600 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Siemens LGB2B040B is a 40A, 600V, 2-pole bolt-on molded case circuit breaker designed to deliver dependable branch-circuit protection in panelboards and load centers. Its bolt-on mounting creates a secure, vibration-resistant bus connection, helping maintain electrical integrity in challenging installation environments.

Key benefits that matter in real-world setups

• Secure bolt-on mounting ensures a rigid, vibration-resistant connection that stays tight through routine service and site conditions.
• Thermal-magnetic trip unit provides stable, repeatable protection: the thermal element handles steady overcurrent, while the magnetic element delivers an instantaneous response to short circuits, helping protect wiring and connected devices.
• 2-pole, 40A, 600V rating supports multi-wire circuits with coordinated protection and safe interruption of power across both conductors.
• OEM compatibility designed to integrate seamlessly with Siemens load centers and panelboards, making installation straightforward and maintenancelicher.
• Versatile application ideal for residential, commercial, and light industrial environments, including main service panels, subpanels, and equipment disconnects.

Ideal use scenarios

• Upgrading or replacing aging breakers in Siemens-compatible panels to restore reliable overcurrent and short-circuit protection.
• Installing in new or existing panelboards where a robust, bolt-on solution is required to withstand vibration and electrical noise in busy electrical rooms.
• Protecting critical branch circuits in homes, offices, shops, and small facilities that demand predictable trip behavior and easy serviceability.

Technical snapshot

• Manufacturer: Siemens
• Part Number: LGB2B040B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Voltage Rating: 600V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

With its combination of secure mounting, precise protection, and OEM compatibility, the Siemens LGB2B040B is a dependable choice for safeguarding electrical systems across a range of installations. It’s a practical, no-nonsense solution for installers who value consistency, reliability, and ease of integration in Siemens-based panel configurations.