E43B020 - 20Amp Circuit Breaker

E43B020 - 20 Amp Circuit Breaker

The E43B020 molded case circuit breaker is a 3-pole, 20-amp breaker designed for protecting electrical circuits from overloads and short circuits in commercial and industrial power systems. Built on the E43 frame, it provides interrupting ratings of 18kA at 480VAC and 25kA at 240VAC, allowing it to handle fault conditions commonly found in facility distribution equipment. The bolt-on mounting style helps create a secure connection inside compatible panelboards, while load-side terminals are included to simplify installation. With a 40°C operating rating and HACR classification, the breaker is suitable for HVAC-related circuits as well as other equipment requiring dependable overcurrent protection. These breakers were originally manufactured for durability and long service life, making the E43B020 a practical form, fit, and functional replacement when maintaining existing electrical systems that require the same frame type and electrical ratings.

Key Features and Benefits

• 3-pole breaker design: for use in three-phase electrical systems
• 20 amp rating: for controlled circuit protection
• Bolt-on mounting: helps ensure a secure installation in compatible equipment
• Interrupting capacity:
  • 18kA at 480VAC
  • 25kA at 240VAC
• HACR rated: for heating, air-conditioning, and refrigeration circuits
• Load-side terminals included: for wiring connections
• Built to last: and intended as a form, fit, and function replacement

Technical Specifications

• Part Number: E43B020
  
• Breaker Type: Molded Case Circuit Breaker
  
• Frame Type: E43
  
• Poles: 3
  
• Amperage Rating: 20A
  
• Interrupting Rating:
  • 18kA @ 480VAC
  • 25kA @ 240VAC
• Mounting Style: Bolt-On
  
• Operating Temperature Rating: 40°C
  
• Included Connections: Load-side terminals
  
• Approximate Height: 6.35 in
  
• Shipping Weight: 2.0 lbs
  

Material Compliance and Certifications

• Industry Standards: The E43B020 circuit breaker is produced to meet established industry standards for molded case circuit protection.
• HACR Rating: Its HACR rating indicates that it can be used on circuits supplying heating, air-conditioning, and refrigeration equipment where this classification is specified. Installation should always follow applicable electrical codes and the equipment manufacturer’s guidelines.
  

Where It Works Best

• The E43B020 is typically used in commercial buildings, industrial facilities, and service equipment where a 20-amp, 3-pole bolt-on breaker is required. It works well in:
• Panelboards and switchboards designed for E43 frame breakers
• HVAC equipment circuits requiring HACR-rated protection
• Facility electrical distribution systems operating at 240V or 480V
• Maintenance replacements where matching electrical ratings and mounting style are important
• For electricians and maintenance teams working with legacy electrical equipment, the E43B020 provides the same physical fit and electrical characteristics needed to keep existing systems operating safely.