Siemens | NGB2B020B | Circuit Breaker | 20A | 2-Pole | 600V | Bolt-On

Siemens NGB2B020B is a 20A, 2-Pole, 600V bolt-on circuit breaker crafted for dependable protection in Siemens bolt-on panels. Built for maintenance, retrofit, and replacement work where precise compatibility matters, this breaker helps keep electrical systems safe and compliant with minimal downtime.

Key specifications

• Amperage: 20A
• Poles: 2-Pole
• Voltage: 600V
• Mounting: Bolt-On
• Part number: NGB2B020B
• Compatibility note: Confirm fit and ratings before ordering. Part number is the best reference for compatibility.

Who it's for

Ideal for technicians and facility managers replacing aging breakers in Siemens bolt-on panels, and for professionals performing panel retrofits where a precise, factory-rated match is essential.

Why this bolt-on breaker matters

• Secure, vibration-resistant connection: The bolt-on design provides a robust, low-impedance path for current, reducing the risk of loose connections in busy electrical rooms.
• Precise protection for 20A circuits: Suitable for residential sub-panels or light commercial circuits requiring dedicated 20A protection on a 2-pole setup, enabling simultaneous disconnection of both hot legs.
• 600V rating for versatile use: Appropriately handles higher voltage panels and equipment common in commercial or industrial environments.
• Peace of mind with exact match: With the part number as your compatibility reference, you minimize the guesswork during maintenance or retrofit projects.

Usage tips: Before installation, power down the panel and discharge stored energy. Use the panel’s manufacturer torque specifications for bolt-on lugs to ensure a tight, safe connection. If you’re replacing an older breaker, compare the bus bar acceptance and mounting footprint to confirm a straightforward swap.