EF2B040 - 40Amp Circuit Breaker

EF2B040 - 40 Amp Circuit Breaker

When you’re keeping an existing electrical system up and running, you don’t want guesswork—you want a breaker that fits right and does its job without hassle. The EF2B040 is built for exactly that. Designed for EF2 frame compatibility, this 40-amp, 3-pole molded case circuit breaker gives you dependable protection against overloads and short circuits in commercial and industrial setups. It installs cleanly into the systems it was made for, helping you avoid unnecessary modifications while keeping your operation moving. Built to last and rated for standard 40°C conditions, it’s a practical solution for maintaining safe, consistent power distribution.

Key Features and Benefits

• Form-and-fit replacement for EF2 frame systems—no rework or system changes needed
• 40 amp capacity with 3 poles for reliable three-phase protection
• Solid interrupting ratings to handle fault conditions with confidence
• Designed for typical operating environments (40°C)
• Molded case design helps provide insulation and durability over time
• Built to last, making it a dependable choice for ongoing system maintenance

Technical Specifications

• Part Number: EF2B040
  
• Amperage: 40A
  
• Poles: 3
  
• Frame Type: EF2
  
• Voltage Ratings & A.I.C.:
  • 14k AIC @ 600VAC
  • 14k AIC @ 480VAC
  • 18k AIC @ 240VAC
• Operating Temperature Rating: 40°C
  
• Breaker Type: Molded Case Circuit Breaker
  
• Approximate Shipping Dimensions:
  • Height: 6.0 in
  • Weight: 3.0 lbs

Material Compliance and Certifications

• The EF2B040 is manufactured in line with commonly accepted electrical industry standards and is suitable for use in systems that follow UL and NEC requirements where applicable. As always, confirm alignment with your specific installation and local electrical codes.

Where It Works Best

• This breaker is a strong fit for:
• Existing commercial and industrial panels requiring EF2 frame breakers
• Maintenance and repair projects where matching original specifications matters
• Legacy electrical systems that depend on consistent, compatible components
• Protection of lighting circuits, motor loads, and distribution panels