SIEMENS NGB1B045BNAV Breaker 45A Molded Case Circuit Breaker

The SIEMENS NGB1B045BNAV is a 1-pole molded case circuit breaker designed for panelboard and switchboard applications. It provides reliable overcurrent protection for electrical distribution systems and is suitable for use by electrical distributors, lighting solutions providers, wire and cable specialists, and switchgear suppliers. This breaker supports a continuous current rating of 45 amperes with a 14kA interrupting capacity, ensuring safe and efficient operation in commercial and industrial electrical installations.

Specifications

• Manufacturer: Siemens
• Manufacturer Part #: NGB1B045BNAV
• Number of Poles: 1
• Continuous Current Rating: 45A @ 40¬∞C
• Interrupting Capacity: 14kA (RMS symmetrical amperes)
• Weight: 1.6760 lbs
• UPC: 040892164848
• Mounting: Panelboard mount (NGB frame)
• Wire Size Compatibility: 8-2/0 AWG Copper, 6-4 AWG Aluminum for 35-125A range (integral with breaker)
• Terminal Torque: 35-55 lb-in depending on conductor size

Features

• Thermal-magnetic trip unit for standard overcurrent protection
• Load and line lugs included as standard
• HACR rated for use with heating, air conditioning, and refrigeration equipment
• Designed for use exclusively with Siemens certified panelboards and switchboards
• Compact 1-inch width per pole for efficient panel space utilization
• Meets UL 489 and CSA standards for molded case circuit breakers
• Includes nut keeper kit (TNKG3) for secure terminal connections

Downloads & Links

• Spec Sheet
• Spec Sheet