EF3B020 - 20 Amp Circuit Breaker

EF3B020 - 20 Amp Circuit Breaker

If you're working with an existing electrical system and need a breaker that fits right the first time, the EF3B020 is built for exactly that purpose. This 3-pole, 20-amp molded case circuit breaker is designed to match EF3 frame setups, helping you restore protection without the hassle of reworking your panel or switchgear. It’s a straightforward, dependable solution for keeping circuits protected from overloads and short circuits—especially in systems where compatibility matters just as much as performance.

With interrupting ratings that cover common industrial and commercial voltages, the EF3B020 provides the level of protection your equipment expects. Its molded case construction is built to last under normal operating conditions, and the 40°C rating makes it suitable for a wide range of environments. Whether you're handling routine maintenance or replacing a failed unit, this breaker keeps your system running as intended—no guesswork, no unnecessary adjustments.

Key Features and Benefits

• 3-pole design supports three-phase power distribution
• 20 amp rating ideal for branch circuit protection
• EF3 frame ensures proper fit in compatible panelboards and switchgear
• Multi-voltage interrupting capacity for reliable fault protection
• Built to last with durable molded case construction
• Helps maintain system integrity without requiring modifications

Technical Specifications

• Part Number: EF3B020
  
• Poles: 3
  
• Amperes: 20A
  
• 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
  
• Dimensions / Shipping Weight:
  • Height: 6.0 inches
  • Weight: 4.5 lbs

Material Compliance and Certifications

• Meets standard industry expectations for molded case circuit breakers
• Designed for use in systems aligned with NEC requirements
• Commonly used in applications requiring UL-listed equipment (confirm specific project needs prior to installation)

Where It Works Best

• The EF3B020 is a practical choice for commercial and industrial environments where EF3 frame breakers are already in place. It fits right into existing panelboards and switchgear, making it ideal for maintenance teams, contractors, and facility managers who need a reliable replacement that keeps systems consistent. Whether you're servicing older infrastructure or maintaining ongoing operations, this breaker is built to do the job without complication.