ET4039 - 90Amp Circuit Breaker

ET4039 - 90Amp Circuit Breaker

The ET4039 molded case circuit breaker is a 90 Amp, 3-pole Type F breaker designed for use in 480VAC electrical distribution systems. With a 14 kA interrupting capacity at 480 VAC and a 40°C ambient temperature rating, it is intended for commercial and industrial applications where maintaining the original equipment configuration is important. Built with a durable molded case design, the ET4039 is a form, fit, and functional replacement for compatible systems, making it a practical choice when replacing an existing breaker without changing the original electrical design. Built to last, this breaker helps provide the circuit protection required for overloads and short circuits while supporting continued operation of legacy electrical equipment.

Key Features and Benefits

• 90 Amp current rating
• Three-pole configuration for three-phase electrical systems
• Type F molded case circuit breaker
• Rated for 480VAC applications
• 14kA interrupting capacity at 480VAC
• Designed for operation in 40°C ambient temperatures
• Durable molded case construction built to last
• Form, fit, and functional replacement for compatible equipment
• Helps protect electrical circuits from overloads and short circuits
• Suitable for maintaining the original design and operation of existing electrical systems
  

Technical Specifications

• Part Number: ET4039
  
• Product Type: Molded Case Circuit Breaker
  
• Type: F
  
• Amperage: 90 Amps
  
• Poles: 3
  
• Voltage Rating: 480VAC
  
• Interrupting Capacity: 14kA @ 480VAC
  
• Ambient Temperature Rating: 40°C
  
• Dimensions:
  • Height: 10.00 in.
  • Width: 4.50 in.
  • Depth: 4.00 in.
• Approximate Shipping Weight: 11 lbs.
  

Material Compliance and Certifications

• The ET4039 should be installed only where its amperage, voltage rating, interrupting capacity, pole configuration, and breaker type match the original equipment specifications.
• Properly matching these characteristics helps maintain the intended operation of the electrical system.
• Installation should be performed by qualified personnel and in accordance with applicable electrical codes and manufacturer requirements.
  

Where It Works Best

The ET4039 is commonly used in commercial buildings, manufacturing facilities, industrial plants, switchboards, panelboards, and other 480VAC electrical distribution systems that require a 90 Amp, 3-pole Type F molded case circuit breaker.