A1B220 - 20 Amp Circuit Breaker

A1B220 - 20 Amp Circuit Breaker

The A1B220 is a 20-amp, 2-pole circuit breaker used in compatible 120/240VAC panelboards and electrical distribution systems. With its bolt-on design, it installs securely and is often used in commercial buildings, industrial spaces, and maintenance projects where matching the correct breaker type is important.

This breaker uses a thermal magnetic trip system to help protect circuits from overloads and short circuits. The thermal side reacts to extended overload conditions, while the magnetic trip responds quickly during fault conditions. It's a straightforward, dependable design that has been widely used in electrical systems for years.

Because of its compact size, the A1B220 works well in panelboards with limited space. It's commonly installed for lighting circuits, HVAC equipment, and general branch circuit protection. For electricians and maintenance teams working on existing systems, the right fit can speed replacements and help you avoid unnecessary modifications inside the panel.

The bolt-on mounting style also provides you with a solid connection to the panelboard, making it a good choice for applications where equipment is used daily. Built for long-term service, the A1B220 is intended for dependable operation in compatible electrical systems already in place.

Key Features and Benefits

• 20 Amp Rating: Designed for dependable branch circuit protection in compatible 120/240VAC systems.
• 2-Pole Circuit Breaker: Suitable for applications requiring dual-pole protection in commercial and industrial panelboards.
• 120/240VAC Compatibility: Built for use in compatible electrical distribution systems operating at 120/240VAC.
• Bolt-On Mounting Style: Provides a secure installation and dependable panelboard connection.
• Thermal Magnetic Trip Protection: Helps protect circuits from overloads and short circuits through thermal and magnetic trip functions.
• 10k A.I.C. Rating: Rated at 120/240VAC for reliable interrupting capacity in demanding applications.
• Compact Design: Fits compatible panelboards where installation space is limited.
• Commercial and Industrial Applications: Commonly used in commercial and industrial electrical systems requiring dependable protection.
• A1B Compatibility: Built for form, fit, and functional compatibility with A1B applications.
  

Technical Specifications

• Part Number: A1B220
  
• Type: A1B
  
• Circuit Breaker Style: Thermal Magnetic
  
• Mounting Type: Bolt-On
  
• Poles: 2
  
• Amperes: 20A
  
• Voltage Rating: 120/240VAC
  
• A.I.C. Rating: 10kA @ 120/240VAC
  
• Dimensions:
  • Width: 1.5"
  • Height: 6.0"
  • Depth: 2.31"

Material Compliance and Certifications

• Electrical Distribution Compatibility: The A1B220 is manufactured for use in electrical distribution systems requiring overcurrent protection in compatible panelboards and equipment.
• Industry Standards: Circuit breakers of this type are generally manufactured to meet applicable industry standards for molded-case circuit breakers and electrical safety requirements.
• Installation Requirements: A qualified electrician should always install in accordance with local electrical codes and equipment specifications.
  

Where It Works Best

• Commercial buildings
• Industrial facilities
• Existing A1B-compatible panelboards
• HVAC equipment circuits
• Lighting and branch circuits
• Electrical maintenance projects
• 120/240VAC distribution systems
• Applications requiring bolt-on breaker installation