Siemens | NGB1B040V | Circuit Breaker | 40A | 1-Pole | 347V | Bolt-On

Siemens NGB1B040V Circuit Breaker delivers precise, dependable protection for 347V circuits in commercial and industrial panels. This 40A, 1-Pole bolt-on breaker is engineered for maintenance, retrofit, and replacement projects where exact specifications matter, ensuring your electrical system stays safe, compliant, and up to date.

• Amperage: 40A
• Poles: 1-Pole
• Voltage rating: 347V
• Mounting: Bolt-On
• Part reference: NGB1B040V

Why this Siemens breaker stands out

• Secure, durable mounting: The bolt-on design provides a robust mechanical connection, ideal for panels that require a solid, vibration-resistant fit.
• Designed for 347V systems: Perfect for commercial distribution and certain industrial applications where 347V circuits are prevalent.
• Right-sized protection: A 40-amp rating protects circuits without unnecessary nuisance tripping, helping to keep equipment running smoothly.
• OEM compatibility: As an authentic Siemens device, it aligns with the trip characteristics and coordination you expect from Siemens protective equipment.
• Clear reference for compatibility: When matching parts, the NGB1B040V is your best reference to ensure a precise fit.

Ideal use cases

• Maintenance: Replace a failed or aging breaker in existing Siemens panels that require a 40A, 1-Pole bolt-on solution.
• retrofit projects: Update distribution boards to maintain proper protection on 347V circuits.
• Replacement in 347V feeders: Ensure continuity of critical loads by choosing the exact spec you need.
• New installations where a single-pole, bolt-on breaker is the correct form factor for 347V protection.

Installation tips and compatibility notes

Before purchasing, confirm fit and ratings against your panel specifications. The best compatibility reference is the part number NGB1B040V. For installation, power down the system and follow standard safety practices. Ensure the panel accepts bolt-on breakers and that bus stabs align with the device. When mounting, use the appropriate tool and torque to the manufacturer's specified guidelines to maintain a secure, reliable connection.

Designed for professionals who need exact Siemens specifications, the NGB1B040V is a reliable choice for protecting 347V circuits with confidence. Add this 40A, 1-Pole bolt-on breaker to your maintenance, retrofit, or replacement project and restore steady, safe operation to your electrical distribution system.