E41B040 - 40Amp Circuit Breaker

E41B040 - 40 Amp Circuit Breaker

The E41B040 molded case circuit breaker is a 1-pole, 40-amp breaker designed for use in electrical distribution systems that require dependable circuit protection and a precise fit within compatible E41 frame panelboard configurations. Built to deliver consistent overcurrent protection in commercial and industrial electrical systems, this bolt-on circuit breaker interrupts fault currents rated up to 22kA at 277VAC and 25kA at 120VAC, helping safeguard conductors and connected equipment from damage caused by overloads or short circuits. Its bolt-on mounting style provides a secure mechanical and electrical connection to the panelboard bus, supporting stable installation in legacy power distribution equipment. The breaker is HACR rated and designed for operation in environments up to 40°C, making it suitable for HVAC-related circuits as well as general branch circuit protection. With included load-side terminals and a molded case design built to last, the E41B040 is commonly selected when maintaining or replacing components in existing electrical systems where compatibility and correct ratings are essential.

Key Features and Benefits

• 40 Amp Circuit Protection – Designed to interrupt overloads and short circuits in 120/277VAC electrical systems.
• 1-Pole Configuration – Suitable for single-phase branch circuit protection.
• Bolt-On Mounting Design – Secures directly to compatible panelboard bus connections for stable installation.
• High Interrupting Capacity – Rated 22kA at 277VAC and 25kA at 120VAC for effective fault current interruption.
• HACR Rated – Appropriate for heating, air-conditioning, and refrigeration equipment circuits.
• Includes Load-Side Terminals – Supports straightforward conductor termination during installation.
• Built for Longevity – Molded case construction designed for long service life in electrical distribution systems.
• 40°C Operating Rating – Suitable for standard electrical room and panelboard operating environments.

Technical Specifications

• Part Number: E41B040
  
• Frame Type: E41
  
• Breaker Type: Molded Case Circuit Breaker
  
• Poles: 1
  
• Amperage Rating: 40 Amps
  
• Voltage Rating: Up to 277VAC
  
• Interrupting Capacity:
  • 22kA @ 277VAC
  • 25kA @ 120VAC
• Mounting Style: Bolt-On
  
• Terminal Type: Load-side terminals included
  
• HACR Rating: Yes
  
• Temperature Rating: 40°C
  
• Approximate Shipping Weight: 1 lb
  
• Shipping Height: 6.35 in.
  

Material Compliance and Certifications

• Industry Standards: The E41B040 molded case circuit breaker is manufactured to meet applicable electrical industry standards for molded case breakers used in power distribution systems.
• HACR Certification: HACR certification confirms suitability for HVAC equipment circuits where permitted by code.
• Molded Case Construction: Molded case construction provides electrical insulation and structural durability required for panelboard installations.

Where It Works Best

• This 40-amp bolt-on circuit breaker is typically used in commercial, industrial, and institutional electrical distribution systems where E41 frame panelboards or compatible equipment are installed. It is well-suited for protecting branch circuits, HVAC equipment, lighting systems, and general power distribution circuits operating at 120/277VAC. The breaker is commonly selected when maintaining or replacing components in existing panelboards that require the E41 frame type, ensuring proper form, fit, and function within legacy electrical infrastructure.