NGB3B020B - 20 Amp Circuit Breaker

NGB3B020B - 20 Amp Circuit Breaker

Engineered to deliver dependable overcurrent protection, the Siemens NGB3B020B is a high‑quality, low-voltage, 3-pole circuit breaker ideal for residential, commercial, or light-industrial panelboards. With its thermal-magnetic trip mechanism, this breaker responds swiftly to both prolonged overloads and sudden surges, helping keep wiring systems and connected equipment safe. Its compact design and durable build make installation efficient and hassle-free — a great fit whether you’re upgrading an old panel or building a new electrical setup from the ground up.

Key Features and Benefits

• Thermal‑Magnetic Trip Unit: Combines long‑term overload protection with instantaneous surge response — safeguarding wiring and devices from both sustained overcurrent and sudden shorts.
• Reliable Interrupting Capacity: Rated for 14 kAIC at 600Y/347 V and 25 kAIC at 480Y/277 V — making it suitable for a wide variety of electrical loads and system configurations.
• Space‑Saving Design: Compact footprint (3″ W × 5.4″ H × 2.8″ D) helps maximize panel real estate and simplifies wiring layout in tight panelboard locations.
• Secure Load Connections: Equipped with load-side lugs (TC1Q1) for safe, firm wiring terminations, ensuring stable electrical connections that stand up over time.
• Broad Wire Compatibility: Accepts 14 to 10 AWG (Copper or Aluminum), giving flexibility for various branch circuits and installation requirements.

Technical Specifications

• Frame Type: G‑Frame
• Poles: 3‑Pole
• Amperage Rating: 20 A
• Voltage Rating: Up to 600Y/347 V
• Interrupting Capacity:
  • 14 kAIC @ 600Y/347 V
  • 25 kAIC @ 480Y/277 V
• Dimensions:
  • Width: 3.0 in
  • Height: 5.4 in
  • Depth: 2.8 in
• Weight: 2.615 lbs
• Mounting: Panelboard mount
• Trip Mechanism: Thermal‑magnetic

Material Compliance and Certifications

• UL Listed: Meets rigorous safety and performance benchmarks set by Underwriters Laboratories, ensuring compliance with recognized electrical safety standards.
• RoHS Compliant: Manufactured in accordance with the Restriction of Hazardous Substances directive, limiting the use of specific hazardous materials.
• REACH Compliant: Conforms to the European Union’s chemical safety and material transparency regulations.
• WEEE Compliant: Eligible for proper disposal or recycling under the Waste Electrical and Electronic Equipment directive when the time comes for end-of-life handling.

Where It Works Best

• The Siemens NGB3B020B is an excellent choice for panelboards in residential homes, commercial buildings, or light industrial facilities — especially when dependable circuit protection and efficient use of panel space are important. It works well in new installations, panel retrofits, or system upgrades. For installations requiring space efficiency, reliable surge protection, and compatibility with standard copper or aluminum wiring, this breaker delivers a solid, long-term solution.