SIEMENS NGB1B125B BREAKER NGB 1P 125A 347V 14KA LD LUG Molded Case Circuit Breaker

The Siemens NGB1B125B is a 1-pole molded case circuit breaker designed for panelboard mounting. It is engineered to provide reliable overcurrent protection for electrical distribution systems. This breaker is suitable for use in Siemens panelboards and switchboards, supporting electrical distributors and lighting solutions requiring dependable circuit protection at 125 amperes continuous current rating. It features integral load lugs compatible with wire sizes for 60/75°C copper and aluminum conductors, making it appropriate for wire and cable applications in commercial and industrial environments. The breaker is HACR rated and UL listed for reverse feed, ensuring compliance with industry standards.

Specifications

• Manufacturer: Siemens
• Manufacturer Part #: NGB1B125B
• Number of Poles: 1
• Continuous Current Rating @ 40°C: 125 A
• Voltage Rating: 347 V AC
• Interrupting Rating: 14 kA RMS symmetrical
• Load Lugs: Included, integral with breaker
• Wire Size Range: #8–1/0 AWG Cu, #8–2/0 AWG Al
• Product Weight: 0.8550 lbs

Features

• HACR rated for HVAC equipment protection
• UL Listed for reverse feed application
• Compact 1-inch width per pole for efficient panelboard space utilization
• Designed exclusively for use with Siemens certified components
• Suitable for 60/75°C copper and aluminum wire connections
• Integral load lugs simplify installation and wiring

Downloads & Links

• Spec Sheet
• Spec Sheet
• Spec Sheet