NGB2B020B - 20 Amp Circuit Breaker

NGB2B020B - 20 Amp Circuit Breaker

Upgrade your electrical setup with the Siemens NGB2B020B – a dependable 20-amp, 2‑pole thermal‑magnetic circuit breaker built to safeguard low‑voltage panelboard systems. Whether you’re outfitting a commercial facility or an industrial panel, this breaker delivers essential overload and short‑circuit protection with consistent, reliable performance. Its compact form and dual-trip design give you peace of mind, while its high interrupting capacity ensures system integrity under demanding conditions.

Key Features and Benefits

• Thermal‑Magnetic Trip Unit — Provides dual safety by combining thermal overload protection with magnetic short‑circuit interruption, so circuits stay protected whether the issue is gradual overload or sudden surge.
• High Interrupting Capacity — Capable of interrupting up to 14 kAIC at 600Y/347 V or 25 kAIC at 480Y/277 V, giving this breaker the strength to handle heavy-duty electrical events without compromise.
• Load-Side Lugs for Easy Installation — Includes ready-to-use load-side lugs (TC1Q1), making installation simple and efficient, and saving you time when wiring.
• Compact Yet Durable Construction — At just 2 x 5.4 x 2.8 inches and 1.889 lbs, this breaker packs powerful protection in a small footprint, ideal for crowded panels or retrofit applications.

Technical Specifications

• Amperage: 20 A
• Poles: 2
• Interrupting Capacity:
  • 14 kAIC (600Y/347 V)
  • 25 kAIC (480Y/277 V)
• Wire Range: 14–10 AWG (Copper or Aluminum)
• Dimensions:
  • Width: 2.0 inches
  • Height: 5.4 inches
  • Depth: 2.8 inches
• Weight: 1.889 lbs

Material Compliance and Certifications

• UL Listed — Meets safety and performance standards required for trusted circuit protection in commercial and industrial installations.
• RoHS Compliant — Manufactured in line with environmental safety standards for restricted hazardous substances.

Where It Works Best

• This circuit breaker is an excellent choice for low-voltage panelboards in commercial buildings, warehouses, light industrial settings, and service panels. It works exceptionally well where you need dependable overload and short-circuit protection without sacrificing space — for example, in compact distribution boards, retrofit jobs, or tight-panel applications. Its 20 A rating and 2‑pole design make it suitable for branch circuits powering lighting, HVAC systems, small motors, or general-purpose outlets.