E43B050 - 50Amp Circuit Breaker

E43B050 - 50 Amp Circuit Breaker

When you need dependable protection for a three-phase electrical system, the E43B050 50 amp molded case circuit breaker is built to handle the job. Designed on the E43 frame, this 3-pole breaker helps protect electrical equipment and distribution systems from overloads and short circuits while maintaining steady performance in demanding commercial and industrial environments. With an interrupting capacity of 18kA at 480VAC and 25kA at 240VAC, it’s capable of safely clearing fault conditions before they cause damage to wiring, equipment, or connected systems.

Installation is straightforward thanks to its bolt-on mounting style, which creates a secure and stable connection inside compatible panelboards or switchgear. The breaker also includes load-side terminals, helping simplify setup and reduce installation time for electricians and maintenance teams. Rated for 40°C operating environments and HACR applications, the E43B050 is a practical choice for protecting heating, air conditioning, and refrigeration equipment, as well as many other types of commercial electrical loads. Its combination of compact design, consistent performance, and trusted molded case protection makes it a solid option when reliability matters.

Key Features and Benefits

• 50 Amp Rating – Provides reliable protection for circuits and connected equipment.
• 3-Pole Design – Ideal for protecting three-phase electrical systems.
• Strong Interrupting Capacity – Rated 18kA at 480VAC and 25kA at 240VAC to safely clear fault conditions.
• Bolt-On Mounting – Creates a secure connection within compatible electrical panels and distribution equipment.
• HACR Rated – Suitable for heating, air conditioning, and refrigeration system protection.
• Includes Load-Side Terminals – Helps speed up installation and simplifies wiring.
• 40°C Rated Operation – Designed to perform reliably in common electrical room environments.

Technical Specifications

• Part Number: E43B050
• Breaker Type: Molded Case Circuit Breaker
• Amperage Rating: 50 Amps
• Poles: 3
• Frame Type: E43
• Interrupting Rating:
  • 18kA @ 480VAC
  • 25kA @ 240VAC
• Mounting Type: Bolt-On
• HACR Rated: Yes
• Operating Temperature Rating: 40°C
• Included Accessories: Load-side terminals
• Height: 6.35 inches
• Shipping Weight: 3.0 lbs

Material Compliance and Certifications

• The E43B050 circuit breaker is manufactured to meet common industry expectations for molded case circuit protection used in commercial and industrial electrical systems. Its design supports consistent trip performance and dependable operation when installed in compatible electrical distribution equipment.

Where It Works Best

• The E43B050 50A 3-pole breaker is commonly used anywhere dependable three-phase circuit protection is required. Typical applications include:
• Commercial electrical panels and distribution systems
• Industrial facilities and manufacturing equipment
• HVAC and refrigeration systems (HACR applications)
• Motor protection circuits
• Electrical maintenance and breaker replacement projects