ED43B040 - 40Amp Circuit Breaker

ED43B040 - 40 Amp Molded Case Circuit Breaker

The ED43B040 molded case circuit breaker is designed to deliver dependable circuit protection for commercial and industrial electrical distribution systems. Built on the ED4 frame platform, this 3-pole, 40-amp breaker helps safeguard electrical equipment from overloads and short circuits while maintaining stable performance in demanding environments. With an interrupting capacity of 18kA at 480VAC and 65kA at 240VAC, the ED43B040 is suited for applications where reliable fault interruption is essential to maintaining system safety and uptime. Its bolt-on mounting configuration provides a secure, stable connection within compatible panelboards and switchboards, helping reduce movement and maintain proper electrical contact over time. Designed for operation in 40°C ambient conditions and HACR-rated, this breaker is appropriate for heating, air conditioning, and refrigeration equipment circuits. The unit also includes load-side terminals for convenient installation and is suitable for reverse feed applications, offering added flexibility for various system layouts.

Key Features and Benefits

• 40 Amp Current Rating – Ideal for protecting branch circuits and electrical equipment operating within a 40A load range.
• 3-Pole Configuration – Provides simultaneous protection across three phases in commercial and industrial systems.
• High Interrupting Capacity – Rated 18kA at 480VAC and 65kA at 240VAC, helping safely clear fault conditions.
• Bolt-On Mounting – Creates a firm connection in compatible panelboards, reducing the chance of loosening over time.
• HACR Rated – Suitable for heating, air conditioning, and refrigeration equipment applications.
• Reverse Feed Suitable – Supports installation flexibility when system design requires alternate power flow direction.
• Load-Side Terminals Included – Simplifies wiring during installation and maintenance.

Technical Specifications

• Part Number: ED43B040
  
• Amperage Rating: 40 Amps
  
• Poles: 3
  
• Frame Type: ED4
  
• Interrupting Rating:
  • 18kA @ 480VAC
  • 65kA @ 240VAC
• Mounting Type: Bolt-On
  
• Ambient Temperature Rating: 40°C
  
• Breaker Type: Sentron Style Molded Case Circuit Breaker
  
• Terminals: Includes load-side terminals
  
• Reverse Feed: Suitable
  
• Approximate Shipping Weight: 3.0 lbs
  
• Approximate Height: 6.35 inches
  

Material Compliance and Certifications

• Industry Manufacturing Standards: The ED43B040 molded case circuit breaker is manufactured to meet industry safety and performance expectations for low-voltage power distribution equipment. Components and materials are produced in accordance with recognized electrical manufacturing standards to support safe operation, durability, and consistent electrical performance in commercial and industrial environments.
• HACR Certification: HACR certification further confirms suitability for HVAC-related circuits commonly found in building infrastructure.
  

Where It Works Best

• This 40A, 3-pole ED4 frame circuit breaker is commonly used in commercial buildings, industrial facilities, and electrical distribution panels where dependable branch circuit protection is required. It is well-suited for HVAC equipment, motor circuits, panelboards, and power distribution systems that demand reliable fault protection and stable electrical performance. Its bolt-on design makes it a practical choice for installations where secure mounting and long-term electrical contact are important.