E43B050L - 50Amp Circuit Breaker

E43B050L - 50 Amp Circuit Breaker

When maintaining or servicing existing electrical equipment, using the correct replacement breaker is essential. The E43B050L molded case circuit breaker is a 50-amp, 3-pole breaker built on the E43 frame, designed to provide reliable circuit protection in commercial and industrial electrical distribution systems. It helps protect circuits from overloads and short circuits while maintaining proper compatibility with equipment originally designed for the E43 frame. With an interrupting capacity of 18kA at 480VAC and 25kA at 240VAC, this breaker supports common three-phase power applications found in panelboards and switchgear.

The HACR rating makes it suitable for circuits supplying heating, air conditioning, and refrigeration equipment, which are common in many facilities. Calibrated at 40°C, the breaker reflects typical operating conditions found inside electrical enclosures and equipment rooms. The molded case construction is designed for long service life, and line-side and load-side terminals are included, helping simplify installation when replacing an existing compatible breaker. For technicians and maintenance teams working with legacy electrical systems, the E43B050L offers the correct form, fit, and functional replacement needed to keep equipment operating as intended.

Key Features and Benefits

• 50 Amp current rating for dependable branch circuit protection
• 3-pole configuration designed for three-phase electrical systems
• E43 frame type for proper compatibility with equipment built for this frame
• Interrupting capacity: 18kA @ 480VAC and 25kA @ 240VAC
• HACR rated, suitable for heating, air conditioning, and refrigeration equipment circuits
• Molded case construction built to last and designed for long-term service
• Includes line and load-side terminals to support installation and replacement work
• 40°C calibration, matching typical operating conditions inside electrical enclosures

Technical Specifications

• Part Number: E43B050L
  
• Amperage Rating: 50 Amps
  
• Poles: 3
  
• Frame Type: E43
  
• Interrupting Capacity:
  • 18kA @ 480VAC
  • 25kA @ 240VAC
• Temperature Calibration: 40°C
  
• HACR Rated: Yes
  
• Breaker Type: Molded Case Circuit Breaker
  
• Terminals: Line and load-side terminals included
  
• Shipping Weight: 3.0 lbs
  
• Height: 6.35 inches
  

Material Compliance and Certifications

• Industry Standards: The E43B050L circuit breaker is produced to meet applicable electrical industry standards for molded case circuit breakers used in North American power distribution systems.
• HACR Rating: The HACR rating confirms that the breaker is suitable for circuits supplying heating, air conditioning, and refrigeration equipment.
• Molded Case Construction: Molded case construction provides electrical insulation and structural durability for safe use in panelboards and switchgear designed for the E43 frame.

Where It Works Best

• The E43B050L 50A 3-pole circuit breaker is commonly used when maintaining or repairing existing electrical systems that require a breaker built on the E43 frame.
• Commercial and industrial panelboards
• Switchgear and electrical distribution equipment
• HVAC and refrigeration systems (HACR rated)
• Motor and equipment branch circuits
• Maintenance and servicing of legacy electrical infrastructure