A1B370 - 70 Amp Circuit Breaker

A1B370 - 70 Amp Circuit Breaker

The A1B370 is a 70-amp, 3-pole circuit breaker used in many commercial and industrial electrical systems. It features a bolt-on design for a secure connection and a thermal magnetic trip unit that helps protect circuits from overloads and short circuits in 240VAC applications.

In many facilities, keeping an existing electrical system running smoothly often comes down to using the right replacement parts. The A1B370 is commonly installed in panelboards and distribution equipment where matching the original breaker type and ratings is important. Its 3-pole configuration makes it suitable for multi-phase systems, while the compact size helps when working in tighter panel spaces.

The thermal-magnetic design combines two types of protection in a single breaker. The thermal portion responds to overloads that build over time, while the magnetic trip reacts quickly during fault conditions. Built for long service life, the A1B370 is designed to handle regular use in properly maintained systems.

Key Features and Benefits

• 70 amp rating for commercial and industrial applications
• 3-pole configuration for multi-phase electrical systems
• Thermal magnetic trip unit for overload and short-circuit protection
• Bolt-on mounting style for secure installation
• 10k A.I.C. rating at 240VAC
• Compact dimensions for compatible panelboards and switchgear
• Commonly used in maintenance and replacement applications
• Designed for reliable day-to-day operation
• Built to last in working electrical environments

Technical Specifications

• Part Number: A1B370
  
• Type: A1B
  
• Amperage: 70 Amp
  
• Poles: 3 Pole
  
• Voltage Rating: 240VAC
  
• A.I.C. Rating: 10k @ 240VAC
  
• Trip Type: Thermal Magnetic
  
• Mounting Style: Bolt-On
  
• Dimensions:
  • Width: 2.25"W
  • Length: 6.00"L
  • Depth: 2.31"D
• Width: 2.25 in.
  
• Height: 6.00 in.
  
• Depth: 2.31 in.
  

Material Compliance and Certifications

• The A1B370 circuit breaker is intended for use in properly rated electrical distribution systems requiring overcurrent protection. Compatibility with existing equipment and applicable electrical codes should always be confirmed before installation. Installation and servicing should be performed by qualified electrical personnel.

Where It Works Best

• Commercial office buildings
• Industrial and manufacturing facilities
• Electrical panelboards and distribution panels
• Multi-phase power distribution systems
• Equipment repair and replacement projects
• Control panels and disconnect applications
• Existing systems using bolt-on breaker designs
• Facilities requiring dependable 70 amp circuit protection