Siemens | NGB1K050B | Circuit Breaker | 50A | 1-Pole | 347V | Bolt-On

Siemens NGB1K050B Circuit Breaker delivers dependable overcurrent protection for 347V circuits in industrial and commercial panels. With a 50A rating and a single-pole configuration, this bolt-on device is optimized for upgrades, repairs, and replacements where exact specifications matter, ensuring your system stays protected without unnecessary downtime.

Key specifications

• Amperage: 50 A
• Poles: 1-Pole
• Voltage: 347 V
• Mounting: Bolt-On
• Part number: NGB1K050B
• Brand: Siemens

Why this Siemens breaker stands out

Designed for reliability in demanding environments, the NGB1K050B pairs Siemens’ longstanding engineering with a straightforward bolt-on installation that reduces service time during maintenance or retrofit projects. Its 50A capacity is well-suited for circuits that require solid protection without the complexity of larger, multi-pole solutions. The single-pole design keeps wiring simple and minimizes enclosure space usage while delivering precise current interruption when faults occur.

Ideal use cases

• Maintenance replacement in existing panels where a 50 A, 1-pole, 347 V breaker is specified
• Retrofit projects upgrading branch circuits to meet new load requirements
• Replacement during equipment upgrades that mandate exact NGB1K050B compatibility

How to confirm compatibility

Always verify fit and ratings before ordering. The part number NGB1K050B is the most reliable reference for compatibility with your enclosure and bus configuration. If your system calls for a 50 A, 1-pole, 347 V bolt-on circuit protector, this Siemens breaker is a precise match.

Installation and safety tips

• Power down the panel and follow lockout/tagout procedures before replacement.
• Ensure the enclosure supports bolt-on mounting and the 347 V rating for your circuit.
• Confirm all wiring is correctly terminated and that the breaker is seated firmly in the mounting rail to prevent loose connections.
• When in doubt, reference the panel manufacturer’s guidelines and the NGB1K050B datasheet for exact installation instructions.