Q1B370 - 70 Am Circuit Breaker

Q1B370 - 70 Amp Circuit Breaker

A dependable workhorse for industrial and commercial settings, the Q1B370 70A circuit breaker brings safety, efficiency, and longevity to your electrical infrastructure. This 3-pole thermal magnetic device is engineered for handling heavy currents and interrupting fault conditions quickly, protecting your system from overloads and short circuits. With its 10 kA interrupting rating (240 VAC), it’s built to handle serious fault energy while maintaining system stability and safeguarding downstream equipment. Whether you're replacing a worn unit or retrofitting an existing panel, the Q1B370 offers a solid balance of rugged performance and operational reliability.

Key Features and Benefits

• High 70-Amp Capacity: Supports heavy load requirements for demanding industrial or commercial circuits without tripping under normal operation.
• Thermal + Magnetic Protection: The combined mechanism ensures accurate response under both overload (thermal) and sudden fault (magnetic) conditions.
• Bolt-On Mounting: Eliminates issues with loose or sliding connections; gives you a firm install that maintains contact integrity over time.
• Space-Aware Design: Requires just 6 panel spaces, helping you preserve room in crowded breaker panels or retrofit applications.
• Fault Tolerance: Rated to interrupt up to 10,000 A at 240 VAC, giving you headroom for fault events and protecting your downstream circuits.

Technical Specifications

• Frame Type: Q1B
  
• Poles: 3
  
• Amperage: 70 A
  
• Interrupting Rating: 10 kA @ 240 VAC
  
• Panel Spaces Required: 6
  
• Dimensions:
  • Width: 2.25″
  • Length: 6.38″
  • Depth: 2.31″
• Shipping Weight: ~5 lb
  

Material Compliance and Certifications

• Quality Controls: This circuit breaker is manufactured under strict quality controls and meets industry safety standards applicable to thermal magnetic protective devices.
• Durability: It is made of durable, electrically rated materials that resist thermal stress, insulation breakdown, and mechanical wear.
• Reliability: Your purchase helps ensure conformity with workplace codes and enhances system reliability under continuous operation.

Where It Works Best

• If you’re maintaining or upgrading an existing electrical distribution system, the Q1B370 is a smart swap-in choice. It fits seamlessly into many conventional industrial panels, replacement projects, or maintenance operations—especially where you don’t want to reconfigure the whole panel layout. Whether in factory automation, HVAC plants, pump systems, or general facility maintenance, this breaker is ideal when you need solid protection without altering your infrastructure.