Siemens NGB2B030B - 30 A, 600 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Siemens NGB2B030B — a 2-pole, 30A, 600V bolt-on molded case circuit breaker engineered for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers.

Built for a secure, vibration-resistant connection, the bolt-on mounting delivers a rigid bus connection that stays tight through equipment operation and environmental vibration. This translates to more consistent protection performance and reduced maintenance downtime in busy electrical environments.

The NGB2B030B features a thermal-magnetic trip unit that provides stable, repeatable protection:

• The thermal element handles overload conditions with gradual response, helping prevent nuisance trips in normal startup surges.
• The magnetic element delivers instantaneous response to short-circuit events, safeguarding wiring and components from severe faults.

Key advantages at a glance

• Compatible with matching Siemens OEM load centers and panelboards for a streamlined, reliable fit.
• 2-pole design supports common residential and commercial configurations, delivering coordinated protection for multi-wire circuits.
• 600V rating provides headroom for broader distribution needs while maintaining branch circuit safety.
• Bolt-on mounting simplifies installation in compatible panelboards, reducing assembly time and ensuring a solid, long-lasting connection.

Ideal applications

• Residential electrical panels and main distribution boards that require dependable 2-pole protection for shared neutrals or multi-branch circuits.
• Commercial panelboards in lighting, receptacle, and small equipment circuits where stable overcurrent protection is essential.
• Light industrial setups where compact, robust MCCB protection is needed without compromising service continuity.

Technical snapshot

• Manufacturer: Siemens
• Part Number: NGB2B030B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 30A
• Voltage Rating: 600V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Choosing the Siemens NGB2B030B means aligning with a trusted OEM standard designed for longevity and predictable performance in real-world panel installations. If you’re upgrading or retrofitting Siemens panelboards, this bolt-on 30A, 600V, 2-pole MCCB delivers the protection you need with the construction quality you expect from Siemens.