EF3B070 - 70Amp Circuit Breaker

EF3B070 - 70 Amp Circuit Breaker

When you’re maintaining or servicing an existing electrical system, the last thing you want is guesswork. The EF3B070 molded case circuit breaker gives you a straightforward, dependable solution for keeping your system protected and running as intended. Built with a 70-amp rating and a 3-pole configuration, this breaker is designed to match the form and fit of EF3 frame equipment—making it a practical choice when replacing a unit in commercial or industrial setups. It handles overloads and short circuits with confidence, while its molded case construction helps shield internal components from everyday wear. Simply put, it’s a solid, built-to-last breaker that keeps your existing system doing its job without unnecessary changes.

Key Features and Benefits

• 70 Amp capacity for consistent, reliable circuit protection
• 3-pole configuration ideal for three-phase electrical systems
• EF3 frame type ensures compatibility with matching panelboards and equipment
• Interrupting capacity rated at 14kA @ 600VAC and 480VAC, and 18kA @ 240VAC
• Designed for operation in 40°C environments common in commercial and industrial settings
• Molded case design helps protect internal components from damage
• Built to last, making it a dependable choice for ongoing system maintenance

Technical Specifications

• Part Number: EF3B070
  
• Amperage: 70A
  
• Poles: 3
  
• Frame Type: EF3
  
• A.I.C. Rating:
  • 14kA @ 600VAC
  • 14kA @ 480VAC
  • 18kA @ 240VAC
• Operating Temperature Rating: 40°C
  
• Breaker Type: Molded Case Circuit Breaker
  
• Dimensions / Shipping Weight:
  • Height: 6.0 in
  • Weight: 4.5 lbs

Material Compliance and Certifications

• Manufactured to meet established molded case circuit breaker standards for safety and performance
• Suitable for use in installations requiring adherence to recognized electrical codes
• Designed for consistent operation within specified voltage and interrupting ratings (confirm local code requirements before installation)

Where It Works Best

• The EF3B070 is a strong fit for commercial buildings, industrial facilities, and legacy electrical systems where EF3 frame breakers are already in place. It’s commonly used in panelboards, switchboards, and distribution equipment that rely on a 70-amp, 3-pole breaker. If you’re replacing an existing unit or maintaining older infrastructure, this breaker helps you stay aligned with original system specifications—keeping everything running smoothly without added complexity.