Siemens NGB1B030B - 30 A, 347 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens NGB1B030B, a 30 A, 347 V, 1-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection for panelboards and load centers. Built to handle the demands of residential, commercial, and light industrial environments, this unit prioritizes a solid, uninterrupted electrical path from the moment it’s installed.

Key capabilities that matter in the field

• 30 amp rating provides precise protection for branch circuits, preventing overheating and potential damage to wiring and devices.
• 347 V voltage rating makes it suitable for steady-state protection in higher-voltage HVAC, lighting, and commercial installations common in modern buildings.
• 1-pole design delivers focused overcurrent protection where a single circuit needs reliable disconnection.
• Bolt-on mounting secures a rigid, vibration-resistant connection to the bus, reducing the risk of loose contacts in demanding environments.
• Thermal-magnetic trip unit ensures stable, repeatable protection against both overloads and short circuits, with fast, predictable responses.
• Molded case construction provides durability and consistent performance within panelboards and load centers.
• OEM compatibility designed to work with matching Siemens panelboards and load centers for seamless integration.
• Versatile applications well-suited for residential panels, commercial distribution, and light industrial electrical systems needing reliable circuit protection.

Why this breaker stands out

The NGB1B030B isn’t just a component in a box—it’s a core safeguard for your electrical distribution. The bolt-on design creates a robust bus connection that resists vibration and movement, which is especially valuable in spaces with equipment or frequent door traffic. The thermal-magnetic trip unit provides predictable protection curves, helping you avoid nuisance trips while ensuring quick disconnection during genuine faults. Coupled with OEM compatibility, this breaker simplifies replacements and maintenance, letting you source a direct, reliable match for your Siemens panel or load center.

Ideal use cases and practical scenarios

• Residential subpanels requiring dependable 30 A branch circuit protection in homes with higher-voltage distribution needs.
• Commercial lighting and outlet circuits in offices and retail spaces where panel reliability and uptime matter.
• Light industrial equipment feeds where compact, robust protection is needed without sacrificing performance.
• Panelboard upgrades or replacements that demand exact OEM compatibility and a secure bolt-on connection.

From AmpState, the Siemens NGB1B030B (Part Number: NGB1B030B) delivers precise, durable protection for critical electrical infrastructure. If you’re building, upgrading, or maintaining a panel, this 1-pole, bolt-on breaker offers a reliable balance of performance, compatibility, and ease of installation that helps your system run safely and efficiently.