E3090 - 90Amp Circuit Breaker

E3090 - 90 Amp Circuit Breaker

The E3090 circuit breaker is a 3-pole, 90-amp thermal-magnetic breaker designed for dependable circuit protection in electrical distribution systems operating at up to 240VAC with a 10kA interrupting rating. Built on the E frame platform, this breaker provides the correct form, fit, and function replacement for compatible legacy panels and equipment that require this specific configuration. The integrated non-interchangeable trip unit helps ensure consistent protection against overloads and short circuits, while the thermal-magnetic design responds to both sustained overcurrent conditions and instantaneous fault events. Rated for operation at 40°C, the E3090 is commonly used in commercial and industrial installations where maintaining compatibility with existing electrical infrastructure is essential. Load terminals are included, supporting straightforward installation in systems designed for this breaker type. As with many legacy electrical components, these breakers were built to last and continue to serve reliably when properly maintained and installed by qualified professionals.

Key Features and Benefits

• 90 Amp Current Rating – Designed to protect circuits carrying up to 90 amps in compatible electrical distribution systems.
• 3-Pole Configuration – Suitable for three-phase applications requiring simultaneous disconnection across all phases.
• Thermal-Magnetic Protection – Combines thermal overload protection with magnetic response for short-circuit conditions.
• 10kA Interrupting Capacity at 240VAC – Rated to safely interrupt fault currents up to 10,000 amps at 240 volts AC.
• Frame Type E Design – Ensures correct physical fit and electrical compatibility with panels and systems designed for E-frame breakers.
• Non-Interchangeable Trip Unit – Factory-set trip characteristics provide consistent operation without field adjustment.
• Load Terminals Included – Supports proper conductor termination during installation.
• 40°C Rated Operation – Designed to operate within standard ambient temperature conditions for many electrical environments.

Technical Specifications

• Part Number: E3090
  
• Amperage Rating: 90 Amps
  
• Number of Poles: 3
  
• Voltage Rating: 240 VAC
  
• Interrupting Capacity (A.I.C.): 10kA @ 240VAC
  
• Trip Type: Thermal-Magnetic
  
• Trip Unit: Non-Interchangeable
  
• Frame Type: E
  
• Temperature Rating: 40°C
  
• Included Components: Load terminals
  
• Approximate Shipping Dimensions: 6.0 in. height
  
• Shipping Weight: 4.13 lbs
  

Material Compliance and Certifications

• Industry Standards: The E3090 circuit breaker is manufactured to meet applicable industry standards for molded case circuit breakers used in low-voltage power distribution.
• Material Use: Components are produced with materials commonly used in electrical protection devices intended for commercial and industrial installations.
• Installation Requirements: Proper installation and use should follow applicable electrical codes and the requirements of the equipment in which the breaker is installed.

Where It Works Best

• Commercial electrical panels requiring E-frame breakers
• Industrial distribution equipment using 3-pole 90A protection
• Maintenance and repair of existing electrical infrastructure
• Facilities maintaining legacy power systems that require matching breaker form and ratings
• Service replacements where a 10kA @ 240VAC breaker with E-frame dimensions is specified