Siemens NGB1B015B - 15 A, 347 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Siemens NGB1B015B is a 15A, 347V, 1-pole bolt-on molded case circuit breaker designed to protect branch circuits in panelboards and loadcenters. Built for dependable, repeatable protection in busy electrical environments, this breaker keeps critical commercial and light-industrial circuits safeguarded against overloads and short circuits.

• Secure bolt-on mounting provides a rigid, vibration-resistant connection to the bus, helping maintain a solid electrical path even in environments with equipment vibration or heavy operation.
• Thermal-magnetic trip unit delivers stable overload protection with precise magnetic action for fast short-circuit clearing, ensuring predictable performance under varying temperatures and load conditions.
• OEM panel compatibility engineered to fit matching Siemens loadcenters and panelboards, simplifying installation, future maintenance, and system upgrades.
• Versatile applications suitable for residential, commercial, and light industrial installations that utilize 347V distribution—for example lighting panels and small equipment feeders in busy facilities.

• Manufacturer: Siemens
• Part Number: NGB1B015B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 15A
• Voltage Rating: 347V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Who this is for: electricians, contractors, and facility managers working with Siemens OEM panels or 347V commercial distributions will appreciate the reliable performance, secure mounting, and predictable trips of the NGB1B015B. It’s a practical choice for replacing aging breakers or expanding a panel with a trusted, industry-standard component that is built to endure in demanding environments.

Practical tips for optimal results: when upgrading or servicing panels, ensure the bolt-on breaker is seated firmly to maintain a solid bus connection, and verify compatibility with your specific Siemens panelboard model. For projects involving 347V systems, this unit delivers the targeted 15A protection you need for lighting and small-equipment circuits without compromising safety or reliability.