EF3B030 - 30Amp Circuit Breaker

EF3B030 - 30 Amp Circuit Breaker

When you're working with an existing electrical system, the last thing you want is guesswork. The EF3B030 molded case circuit breaker is built for exactly that situation—providing a straightforward, dependable replacement that fits right into EF3 frame setups without forcing changes to your panel or configuration. Rated at 30 amps with a 3-pole design, it’s made to handle three-phase applications while helping protect your system from overloads and short circuits.

What makes this breaker especially practical is its flexibility across voltage applications. With interrupting ratings of 14k A.I.C. at both 600VAC and 480VAC, and 18k A.I.C. at 240VAC, it covers a wide range of common commercial and industrial needs. It operates at a standard 40°C rating and features a molded case design that keeps internal components protected and stable over time. Simply put, it’s a solid, built-to-last solution when you need to maintain your existing system without overcomplicating the job.

Key Features and Benefits

• Designed for EF3 Frame Systems – Fits seamlessly into existing setups for easy replacement
• 30 Amp Rating – Helps manage circuit loads and reduce risk of overload damage
• 3-Pole Configuration – Ideal for three-phase electrical distribution
• Versatile A.I.C. Ratings –
  • 14k @ 600VAC
  • 14k @ 480VAC
  • 18k @ 240VAC
• Molded Case Construction – Enclosed design helps protect internal components from dust and debris
• Built to Last – Designed for long-term use in standard operating environments

Technical Specifications

• Part Number: EF3B030
  
• Amperage: 30A
  
• Poles: 3
  
• Frame Type: EF3
  
• Interrupting Capacity (A.I.C.):
  • 14k @ 600VAC
  • 14k @ 480VAC
  • 18k @ 240VAC
• Operating Temperature Rating: 40°C
  
• Breaker Type: Molded Case Circuit Breaker
  
• Approximate Shipping Weight: 4.5 lbs
  
• Dimensions (Height): 6.0 inches
  

Material Compliance and Certifications

• Manufactured in line with standard industry requirements for molded case circuit breakers
• Suitable for installations requiring adherence to NEC and related electrical codes
• Constructed using durable insulating materials common to molded case breaker designs

Where It Works Best

• The EF3B030 is a great fit for commercial and industrial environments where EF3 frame breakers are already in place. You’ll typically find it used in panelboards and distribution systems in warehouses, production facilities, and large buildings running three-phase power. It’s especially useful when maintaining or repairing existing systems where matching the original specifications matters more than anything else.