SIEMENS NGB2B125BNAV Breaker 125A 2-Pole Molded Case Circuit Breaker

The SIEMENS NGB2B125BNAV is a 2-pole molded case circuit breaker designed for panelboard mounting in electrical distribution systems. It provides reliable overcurrent protection for circuits rated up to 125 amperes at 480Y volts, suitable for use in commercial and industrial electrical applications. This breaker is compatible with Siemens panelboard and switchboard designs, making it a preferred choice for electrical distributors and switchgear suppliers seeking dependable circuit protection solutions.

Specifications

• Manufacturer: Siemens
• Manufacturer Part Number: NGB2B125BNAV
• Number of Poles: 2
• Continuous Current Rating: 125A
• Voltage Rating: 480Y Volts AC
• Interrupting Rating: 25kA at 480Y Volts AC
• Product Weight: 2.7560 lbs
• Panelboard Mount Type: NGB Frame
• Wire Size Compatibility: #8 AWG to 2/0 AWG Copper and Aluminum (per installation guide)
• Terminal Torque: Line terminals 18‚Äì23 lb-in, Load terminals 35‚Äì55 lb-in (depending on wire size)

Features

• Thermal-magnetic trip unit providing standard 40¬∞C ambient protection
• Load and line lugs included as standard for easy installation
• HACR rated for use with heating, air conditioning, and refrigeration equipment
• Suitable for use with copper and aluminum conductors (60¬∞C/75¬∞C rated wire)
• Compact design with 1-inch width per pole, allowing efficient use of panel space
• Compatible with Siemens certified accessories such as nut keeper kits for secure wiring connections
• Designed for use exclusively in Siemens panelboards and switchboards to ensure system compatibility

Downloads & Links

• Spec Sheet
• Spec Sheet