SIEMENS NGB2B045BNAV Breaker 45A 2P 480Y 25K Molded Case Circuit Breaker

The Siemens NGB2B045BNAV is a 2-pole molded case circuit breaker designed for panelboard mounting in electrical distribution systems. It provides reliable circuit protection for branch circuits with a continuous current rating of 45 amperes and a voltage rating suitable for 480Y systems. This breaker is suitable for use by electrical distributors and switchgear suppliers requiring robust protection in commercial and industrial lighting solutions, wire and cable installations, and general electrical distribution.

Specifications

• Manufacturer: Siemens
• Manufacturer Part Number: NGB2B045BNAV
• Number of Poles: 2
• Continuous Current Rating: 45 Amperes @ 40¬∞C
• Voltage Rating: 480Y Volts AC
• Interrupting Rating: 25 kA RMS Symmetrical Amperes
• Mounting Type: Panelboard Mount
• Weight: 2.756 lbs (1.25 kg)
• Wire Size Compatibility: #8 to 2/0 AWG Copper and Aluminum (with appropriate lugs)
• Terminal Type: Line and Load Lugs included as standard
• HACR Rated

Features

• Thermal-magnetic trip unit providing reliable overload and short circuit protection
• Includes load and line lugs for easy installation and secure wire connection
• Compatible with Siemens certified accessories such as Nut Keeper Kit (TNKG3) for secure terminal connections
• Designed for use exclusively in Siemens panelboards and switchboards ensuring system compatibility
• Compact 2-pole design with 1-inch width per pole for efficient panel space utilization
• Meets UL 489 and CSA certification standards for safety and performance
• Installation instructions specify insulation requirements and torque values for wire connections to maintain system integrity

Downloads & Links

• Spec Sheet
• Spec Sheet