NGB2B125B - 125 Amp Circuit Breaker

NGB2B125B - 125 Amp Circuit Breaker

The NGB2B125B is a dependable, panelboard-mounted G‑frame circuit breaker engineered to deliver reliable protection for a wide range of low-voltage electrical systems. With its thermal-magnetic trip unit, this breaker provides reliable protection against both overloads and short circuits — safeguarding your equipment and wiring while ensuring dependable operation day after day. It’s built for real-world commercial and industrial settings where consistent performance and safety matter most.

Key Features and Benefits

• Thermal-Magnetic Trip Unit: Precisely senses overloads and short circuits for accurate and dependable circuit protection, helping prevent damage and downtime.
• 125 Amp, 2‑Pole Configuration: Handles moderate to heavy loads for commercial and industrial applications, giving flexibility across many electrical system requirements.
• Load-Side Lugs (TC1GG20): Ensure secure, stable connections, often reducing installation time and complexity compared to other wiring solutions.
• Broad Wire Compatibility: Supports copper or aluminum conductors from 8 AWG up to 1/0 AWG, accommodating a variety of wiring scenarios without needing special adapters.

Technical Specifications

• Voltage Rating: Up to 600Y/347 V
  
• Current Rating: 125 Amp, 2‑pole
  
• Interrupting Rating:
  • 14 kAIC @ 600Y/347 V
  • 25 kAIC @ 480Y/277 V
• Dimensions:
  • Width: 2.0 inches
  • Height: 5.4 inches
  • Depth: 2.8 inches
• Weight: 1.889 lbs
  

Material Compliance and Certifications

• UL Standards: This circuit breaker carries a recognized safety listing under UL standards, ensuring that it meets widely accepted performance and reliability benchmarks.
• RoHS Compliance: It also aligns with RoHS directives, reflecting a commitment to reducing hazardous substances — giving you confidence not only in safety but also in environmental responsibility.

Where It Works Best

• The NGB2B125B is exceptionally well-suited to commercial and industrial applications — from office buildings and retail facilities to factories, workshops, and light-manufacturing sites. It’s a dependable choice for protecting distribution panels and branch circuits where demand can fluctuate, and safety cannot be compromised. If you’re upgrading older panelboards or putting in a new installation that needs 125 Amp protection for circuits fed by 8 to 1/0 AWG wire, this breaker delivers consistent performance you can count on.