NGB2B090B - 90 Amp Circuit Breaker

NGB2B090B - 90 Amp Circuit Breaker

The Siemens NGB2B090B 90 Amp G‑Frame circuit breaker brings dependable, high‑performance protection to your electrical setup. Designed for panelboard mounting, this breaker uses a thermal‑magnetic trip unit that responds both to excessive current draw and instantaneous surges — giving you steady overload and short‑circuit defense. It's UL‑listed and built to meet rigorous safety standards, so whether you're wiring a commercial switchboard or upgrading a residential service panel, this breaker ensures your circuits stay secure under heavy use. Compact yet powerful, it's engineered to deliver consistent protection where you need it most.

Key Features and Benefits

• Thermal‑Magnetic Trip Unit — Offers dual protection by combining slow thermal overload detection with fast magnetic short‑circuit response, helping prevent wiring damage and reducing downtime.
• High Interruption Capacity — Handles up to 14 kAIC at 600Y/347 V or 25 kAIC at 480Y/277 V, making it suitable for installations with high short‑circuit potential or demanding industrial loads.
• Load‑Side Lugs Only (TC1GG20) — Simplifies wiring and installation by accepting a broad range of conductor types, reducing installation time and complexity.
• Compact, Space‑Saving Design — At just 2" wide and 5.4" tall, it fits nicely into standard G‑Frame panelboards — ideal when space is limited, or panels are already crowded.

Technical Specifications

• Amperage: 90 A
• Poles: 2
• Voltage Rating: 600Y/347 V or 480Y/277 V
• Breaking Capacity: 14 kAIC (600Y/347 V) / 25 kAIC (480Y/277 V)
• Dimensions: 2.0" (W) × 5.4" (H) × 2.8" (D)
• Wire Range: 8 AWG – 1/0 AWG (Copper or Aluminum)

Material Compliance and Certifications

• UL‑Listed — Meets U.S. safety and performance standards so that you can trust it for commercial, industrial, or residential use.
• RoHS Compliant — Conforms to environmental standards adopted since July 1, 2006, ensuring the materials meet global safety and sustainability practices.
• WEEE Take‑Back Compliance — Complies with disposal and recycling regulations, helping promote environmentally responsible end‑of‑life handling.

Where It Works Best

• This breaker is a wise choice for projects needing dependable circuit protection across a variety of settings. It suits small to medium commercial panelboards, light‑industrial control panels, and residential service upgrades alike. Choose the NGB2B090B when you want a dependable, high‑capacity breaker that delivers consistent performance — whether you're protecting lighting circuits, HVAC units, motor loads, or other critical electrical services.