Siemens NGB1B050B - 50 A, 347 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Siemens NGB1B050B is a 50-amp, 347-volt, 1-pole bolt-on molded case circuit breaker engineered to protect panelboards and load centers from overcurrent and short circuits. Built for dependable performance in demanding environments, this unit delivers a secure, professional-grade solution for single-pole protection.

• Secure bolt-on mounting: a rigid, vibration-resistant bus connection that stays tight, even in cabinets subject to movement or vibration.
• Thermal-magnetic trip unit: provides stable, repeatable protection by reliably detecting overloads and short-circuit events and tripping as designed.
• OEM-compatible: designed to work with matching Siemens OEM load centers and panelboards for proper fit, alignment, and maintenance of system warranty expectations.
• Versatile applications: an ideal choice for residential, commercial, and light industrial panel installations requiring robust branch-circuit protection.

Technical snapshot: 50A rating, 347V maximum, 1-pole, bolt-on mounting, molded case construction. This combination makes it well-suited for single-phase branch circuits in distributed electrical systems where reliable protection and straightforward installation matter.

• Use cases include protecting feeders for HVAC equipment, large appliances, or high-demand lighting runs within panelboards and load centers using 347V distribution.
• Suitable for replacement in Siemens NGB-series installations, maintaining circuit protection coherence across a panel.
• Perfect for installations in residential, commercial, or light industrial settings where a rugged, mount-on breaker is preferred for extended service life.

Why choose the NGB1B050B over alternatives? Its bolt-on design delivers a more secure mechanical connection to the bus, reducing contact looseness in vibration-prone environments and helping preserve consistent trip characteristics over time. The thermal-magnetic protection ensures rapid, predictable responses to both overloads and short circuits, minimizing damage to wiring and connected equipment.

For best results, pair this 1-pole breaker with compatible Siemens panelboards and load centers to ensure proper fit and coordinated protection throughout your electrical system. Always follow local electrical codes, disconnect power before service, and rely on a licensed electrician for installation and wiring practices.