Siemens NGB1B030B Circuit Breaker – VL Series – NGB Frame – 30A – 1 Pole – 347VAC – Bolt-On – Thermal Magnetic

The Siemens NGB1B030B is a VL Series molded case circuit breaker designed for reliable low-current protection in compact panelboard applications. Rated at 30A and 347VAC, this 1-pole breaker is built on the NGB frame platform and is suitable for single-phase electrical distribution systems requiring dependable circuit protection.

Equipped with a thermal-magnetic trip unit, the NGB1B030B provides Long-Time and Instantaneous (LI) protection, ensuring fast and reliable response to overload and short-circuit conditions. Its bolt-on design allows secure installation in panelboards and supports reverse feed applications where applicable.

This breaker is UL listed and engineered for durability, consistent performance, and high interrupting capacity in commercial and industrial electrical systems.

Specifications

• Brand: Siemens / ITE
• Part Number: NGB1B030B
• Series: VL Series
• Frame Type: NGB Frame
• Category: Molded Case Circuit Breaker
• Mounting Type: Panelboard Bolt-On
• Configuration: 1 Pole
• Phase: 1 Phase
• Protection Type: Thermal Magnetic
• Trip Functions: LI – Long-Time and Instantaneous

Electrical Ratings

• Current Rating: 30A
• Voltage Rating: 347VAC
• Interrupting Capacity: 25kA @ 277VAC
• Application Suitability: Reverse feed capable (panelboard dependent)

Construction

• Compact NGB frame molded case design
• Bolt-on mounting system for panelboards
• Thermal-magnetic trip mechanism
• Load side lugs included
• Industrial-grade durable housing

Functions

• Overload protection
• Short-circuit protection
• Long-time delay protection
• Instantaneous fault protection
• Circuit switching and isolation

Dimensions

• Height: 1 in
• Width: 5.4 in
• Depth: 2.8 in
• Weight: 4.19 lb

Applications

• Commercial electrical panelboards
• Industrial distribution systems
• Lighting and control circuits
• Single-phase branch circuit protection
• Compact low-voltage installations
• Reverse feed panelboard applications

Returns are easy

You may return items within 30 days of delivery for a refund.

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