A1B390 - 90 Amp Circuit Breaker

A1B390 - 90 Amp Circuit Breaker

Make sure your electrical systems stay safe, stable, and efficient with the A1B390 90 Amp bolt‑on circuit breaker. Built for heavy‑duty industrial and commercial use, this breaker delivers dependable overload and short‑circuit protection, guarding your machinery and wiring from dangerous electrical faults. Its thermal‑magnetic tripping mechanism responds quickly to excessive current or sudden surges, helping prevent damage before it happens. With its space‑saving design and simple bolt‑on installation, the A1B390 is a dependable workhorse that brings both safety and convenience to demanding power environments.

Key Features and Benefits

• High-capacity protection: The A1B390 shields your system from both thermal overloads and magnetic short circuits, giving you dual-layer protection against electrical hazards.
• Bolt-on design for secure installation: The bolt-on configuration ensures a solid, stable connection inside your electrical panel — no loose fittings, no hassle.
• Strong A.I.C. rating: Rated for 10,000 A.I.C. at 240 VAC, this breaker can safely handle high fault currents, making it ideal for heavy-duty equipment and large electrical loads.
• Compact yet enduring build: Measuring just 2.25" × 6.00" × 2.31", the A1B390 doesn’t take up unnecessary space while delivering long-lasting, reliable performance.
• Consistent performance under stress: Its thermal‑magnetic technology adapts dynamically to load conditions, so whether you’re running heavy motors or high-capacity HVAC systems, the breaker stays responsive.

Technical Specifications

• Poles: 3
  
• Amperage: 90 A
  
• A.I.C. Rating: 10,000 at 240 VAC
  
• Frame Type: A1B
  
• Dimensions:
  • Width: 2.25 inches
  • Length: 6.00 inches
  • Depth: 2.31 inches
• Ship Weight: 3.10 lbs
  

Material Compliance and Certifications

• Industry Standards: The A1B390 is manufactured from high-quality, industrial-grade materials that meet current electrical code requirements. Its components comply with relevant safety and quality standards for industrial circuit breakers, giving you peace of mind that you’re using a fully certified device built for demanding installations.

Where It Works Best

• Choose the A1B390 for industrial or commercial installations that demand dependable power protection — especially in environments with heavy motors, large HVAC systems, or variable electrical loads. It’s a strong fit for manufacturing floors, warehouse facilities, commercial buildings, and any setting where 90-amp service is required. The breaker’s quick response to overloads and short circuits helps keep equipment running smoothly and your facility safe from electrical mishaps.