E42B040 - 40Amp Circuit Breaker

E42B040 - 40 Amp Circuit Breaker

The E42B040 molded case circuit breaker is a 2-pole, 40-amp bolt-on breaker designed for dependable circuit protection in commercial and industrial electrical distribution systems. Built on the E42 frame platform, this breaker helps safeguard wiring and connected equipment from overloads and short circuits while maintaining compatibility with existing panelboard installations that require this form and fit. With interrupting ratings of 18kA at 480VAC and 25kA at 240VAC, the E42B040 is suitable for applications where reliable fault interruption and consistent performance are essential. The breaker includes load-side terminals for straightforward installation and is HACR rated, making it appropriate for heating, air conditioning, and refrigeration equipment circuits. Manufactured for durability and long service life, this molded case circuit breaker is designed to meet the demands of legacy electrical systems that rely on the E42 frame configuration.

Key Features and Benefits

• 40 Amp continuous rating: 40 Amp continuous rating for branch circuit protection in commercial and industrial systems
• 2-pole configuration: 2-pole configuration designed for 240V and 480V circuit applications
• Bolt-on mounting design: Bolt-on mounting design ensures secure connection to compatible panelboards
• Reliable interrupting capacity: 18kA interrupting capacity at 480VAC / 25kA at 240VAC for reliable fault interruption
• HACR rated: HACR rated for use with heating, air conditioning, and refrigeration equipment
• Load-side terminals included: Includes load-side terminals to simplify installation and wiring connections
• E42 frame compatibility: E42 frame compatibility supports form, fit, and functional replacement in existing systems
• Durable construction: Built to last for dependable service in electrical distribution environments

Technical Specifications

• Part Number: E42B040
  
• Frame Type: E42
  
• Breaker Type: Molded Case Circuit Breaker
  
• Amperage Rating: 40 Amps
  
• Number of Poles: 2
  
• Interrupting Rating:
  • 18kA @ 480VAC
  • 25kA @ 240VAC
• Mounting Type: Bolt-On
  
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Terminals: Load-side terminals included
  
• Approximate Shipping Weight: 2.0 lbs
  
• Approximate Height: 6.35 in
  

Material Compliance and Certifications

• Electrical Safety Standards: The E42B040 circuit breaker is manufactured to meet commonly accepted electrical safety and performance standards associated with molded case circuit breakers used in commercial and industrial power distribution systems.
• HACR Certification: HACR certification supports use in HVAC-related circuits where permitted by code. Always confirm compatibility with local electrical codes and equipment requirements before installation.
  

Where It Works Best

• The E42B040 40A circuit breaker is commonly used in electrical distribution systems that require an E42 frame bolt-on breaker for proper panelboard compatibility. Typical applications include commercial facilities, industrial control panels, and building electrical systems where dependable branch circuit protection is needed. It is also suitable for HVAC circuits due to its HACR rating and works well as a form, fit, and functional replacement in existing equipment designed for E42 frame breakers.