EF2B040 - 40Amp Circuit Breaker

EF2B040 - 40Amp Circuit Breaker

The EF2B040 is a 40 Amp, 2-pole molded case circuit breaker designed for use in electrical systems that require compatible Type EF2 components. When you’re maintaining existing equipment, staying consistent with the original breaker type and dimensions helps keep everything operating as intended. This unit is built specifically for that kind of work—where fit, ratings, and system compatibility matter most.

Rated at 40 amps, the EF2B040 supports multiple voltage levels, with interrupting capacities of 18 kA at 240 VAC and 14 kA at both 480 VAC and 600 VAC. It is commonly used in commercial and industrial power distribution systems where dependable circuit interruption is required under fault conditions. Designed for operation in ambient temperatures up to 40°C (104°F), this breaker is intended for use in properly maintained electrical environments where long-term system continuity is important.

Key Features and Benefits

• 40 Amp, 2-pole Type EF2 molded case circuit breaker
• Designed for direct replacement in compatible EF2 systems
• Supports multiple voltage applications
• Interrupting ratings:
  • 18kA @ 240VAC
  • 14kA @ 480VAC
  • 14kA @ 600VAC
• Helps protect electrical circuits from overload and short-circuit conditions
• Molded case design for enclosed circuit protection
• Consistent physical dimensions for EF2 panel compatibility
• Suitable for maintenance and system upkeep applications
• Rated for operation up to 40°C (104°F)

Technical Specifications

• Part Number: EF2B040
  
• Type: EF2
  
• Amperage: 40 Amps
  
• Poles: 2
  
• Interrupting Capacity: 18kA @ 240VAC; 14kA @ 480VAC; 14kA @ 600VAC
  
• Operating Temperature: 40°C (104°F)
  
• Dimensions:
  • Width: 3.00" W
  • Length: 6.00" H
  • Depth: 3.63" D
• Approximate Shipping Weight: 4.00 lbs.
  

Material Compliance and Certifications

The EF2B040 is intended for installation in systems designed for Type EF2 molded case circuit breakers. Proper installation should be performed by qualified personnel in accordance with applicable electrical codes and safety requirements. Always verify electrical ratings, pole configuration, and physical compatibility before use to ensure correct system matching.

Where It Works Best

This breaker is commonly used in environments where the goal is to maintain existing electrical infrastructure. Typical applications include:

• Commercial electrical distribution panels
• Industrial control and power systems
• Facility maintenance and electrical repairs
• HVAC and mechanical system circuits
• Legacy EF2-compatible installations
• Equipment requiring consistent replacement form and fit