Siemens NGB3B045B - 45 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens NGB3B045B is a 45A, 600V, 3-pole bolt-on molded case circuit breaker engineered to shield branch circuits from overcurrent and short-circuit events. Built for reliability in panelboards and loadcenters, this unit combines rugged mechanical mounting with precise thermal-magnetic protection to keep electrical systems running smoothly.

Key benefits

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection that helps maintain consistent electrical contact even in environments with machinery or shifting loads.
• Thermal-magnetic trip unit delivers stable, repeatable protection by responding to both overload (thermal) and short-circuit (magnetic) conditions, reducing nuisance trips and improving overall safety.
• OEM-compatible design is engineered to pair with matching Siemens OEM load centers and panelboards for seamless integration and dependable performance.
• Versatile application suitable for residential, commercial, and light industrial installations, offering a reliable solution across a range of electrical systems.

Ideal use cases

• New panelboard installations in homes, offices, and small-to-medium facilities where a compact three-pole solution is required.
• Retrofits or replacements in existing Siemens-compatible load centers to restore or upgrade branch circuit protection.
• Protection for multi-wire branch circuits and systems with moderate to heavy load demands that benefit from a robust bolt-on connection.

Technical specifications

• Manufacturer: Siemens
• Part Number: NGB3B045B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 45A
• Voltage Rating: 600V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Installation & compatibility

• Designed for integration with matching Siemens OEM panelboards and loadcenters, ensuring cohesive system performance.
• Best installed in configurations that require secure, vibration-resistant operation and reliable trip performance under varying ambient conditions.
• Follow manufacturer installation guidelines for bolt torque and wiring practices to maintain protection reliability and safety.

Equip your electrical distribution with the Siemens NGB3B045B to achieve dependable branch protection, straightforward installation, and compatibility across Siemens panel products. This 3-pole bolt-on breaker is a practical, durable choice for safeguarding circuits in residential, commercial, and light industrial environments.