Siemens NGG2B040 - 40 A, 600 V, 2-Pole Circuit Breaker | AmpState

The Siemens NGG2B040 delivers dependable branch-circuit protection in a compact, easy-to-integrate form. This 40 A, 600 V, 2-pole molded case circuit breaker is built to guard panels against overcurrent and short-circuit events, making it a reliable choice for residential, commercial, and light-industrial electrical systems. Key benefits that matter in real-world installations:

• Space-efficient design: its molded case construction is engineered to maximize panel space, letting you fit more circuits without compromising safety.
• Thermal-magnetic protection: the dual-action trip unit provides stable, repeatable protection—thermal sensing handles sustained overloads, while magnetic trips respond instantly to short circuits.
• OEM compatibility: designed to drop into Siemens load centers and panelboards that match the NGG2 family, ensuring seamless fitting and consistent coordination with your protection scheme.
• Reliable for multiple environments: suitable for a range of applications—from home electrical panels to office interiors and light manufacturing circuits.

Specifications at a glance

• Manufacturer: Siemens
• Part Number: NGG2B040
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40 A
• Voltage Rating: 600 V
• Number of Poles: 2
• Application: Branch circuit overcurrent and short-circuit protection

Practical use scenarios

• Residential electrical panels protecting kitchen and laundry circuits against overloads and faults.
• Commercial office setups safeguarding lighting, receptacle banks, or small HVAC feed circuits.
• Light industrial panels guarding equipment feeders in constrained spaces where panel real estate matters.

Why this matters for your electrical safety and uptime: by combining a compact footprint with a dependable thermal-magnetic trip, the NGG2B040 helps reduce nuisance tripping while maintaining rapid response to dangerous fault currents. Its compatibility with Siemens OEM load centers means you can trust consistent trip curves and straightforward maintenance or replacement in field service.