NGB3B045B - 45 Amp Circuit Breaker

NGB3B045B - 45 Amp Circuit Breaker

Upgrade your electrical distribution with the Siemens NGB3B045B — a dependable 45-amp, 3‑pole circuit breaker crafted specifically for low‑voltage panelboards. It combines precise thermal‑magnetic protection with a compact footprint, delivering reliable overload and short‑circuit protection while fitting neatly into modern electrical enclosures. Whether you’re installing a fresh system or retrofitting an existing one, this breaker provides consistent performance and peace of mind for commercial or industrial power distribution.

Key Features and Benefits

• Thermal‑Magnetic Trip Unit: Dual-function protection reacts swiftly to overloads (thermal) and short circuits (magnetic), significantly reducing risk of fire damage or equipment failure.
• Space-Saving Form Factor: At just 3.0 × 5.4 × 2.8 inches, the NGB3B045B allows easy installation in tight panelboard configurations without sacrificing functionality.
• High Fault Capacity: Rated 14 kAIC at 600Y/347 V and 25 kAIC at 480Y/277 V, it’s built to handle substantial fault currents — essential for demanding environments.
• Flexible Wiring Options: Load-side lugs (TC1GG20) support 8–1/0 AWG copper or aluminum conductors, making it easy to accommodate a range of wiring setups.
  

Technical Specifications

• Ampere Rating: 45 Amps
  
• Poles: 3
  
• Interrupting Capacity:
  • 14 kAIC at 600Y/347 V
  • 25 kAIC at 480Y/277 V
• Dimensions:
  • Width: 3.0 inches
  • Height: 5.4 inches
  • Depth: 2.8 inches
• Weight: 2.615 lbs
  
• Wire Range: 8 to 1/0 AWG (Copper or Aluminum)
  
• Mounting Method: Panelboard
  

Material Compliance and Certifications

• UL Listed: Meets rigorous safety and performance requirements under recognized testing standards.
• RoHS Compliant: Manufactured in accordance with the Restriction of Hazardous Substances directive, limiting harmful materials for safer end‑of‑life handling.
• REACH-Compliant: Conforms to REACH regulations for protection against harmful chemical substances, promoting environmental and human health safety.
• WEEE Awareness: Designed with end-of-life recycling and responsible disposal in mind, aligning with sustainable electronic waste practices.
  

Where It Works Best

• The NGB3B045B is an excellent match for commercial buildings, light-industrial installations, institutional facilities, and any site requiring reliable low-voltage circuit protection. It shines in panelboard upgrades, new electrical systems, or retrofits where space is limited. If your setup demands dependable overload and short-circuit protection — while meeting strict safety and compliance standards — this breaker provides the reliable performance and wiring flexibility you need.