Siemens | NGB2B040V | Circuit Breaker | 40A | 2-Pole | 600V

Siemens NGB2B040V is a 40 amp, two-pole circuit breaker engineered to protect critical circuits in Siemens panels and compatible enclosures. With a 600V rating, it’s built to handle demanding electrical environments while delivering precise tripping performance when you need it most.

Why this Siemens breaker stands out

• OEM reliability — Specifically designed as part of Siemens’ NGB family, ensuring a perfect fit, consistent trip characteristics, and dependable operation in compatible panels.
• 2-Pole protection — Disengages both hot legs simultaneously for safer shutdown of shared circuits and better protection of appliances and motors.
• 40A circuit capacity — Ideal for circuits with higher load demands, including motorized equipment, HVAC components, or circuits with intermittent high currents.
• 600V rating — Suitable for higher-voltage applications and layouts requiring robust insulation and protection beyond standard 120/240V setups.
• Maintenance-ready — A practical replacement or retrofit solution when upgrading or repairing existing Siemens installations, with compatibility verified by the part number NGB2B040V.

Key specifications at a glance

• Amperage: 40A
• Poles: 2-Pole
• Voltage: 600V
• Reference: NGB2B040V

Ideal use cases

• Maintenance and retrofit projects in Siemens panels that require a precise NGB-series fit
• Replacement for worn or tripped breakers in commercial or light-industrial electrical rooms
• New installations that demand a reliable 40A, two-pole breaker rated up to 600V

Important compatibility note

Confirm fit and ratings before ordering. The part number NGB2B040V is the best reference for compatibility, ensuring you get the exact Siemens breaker that matches your panel requirements and electrical specifications.

Practical tips for best results

• Consult your panel’s labeling and documentation to verify that a 40A, 2-pole, 600V breaker is appropriate for the circuit you’re protecting.
• When replacing, power down the equipment and use proper lockout/tagout procedures before removing the existing breaker.
• Store additional NGB2B040V units in a clean, dry environment to ensure optimal performance when needed for future maintenance.