E42B090 - 90Amp Circuit Breaker

E42B090 - 90 Amp Circuit Breaker

The E42B090 molded case circuit breaker is a 2-pole, 90-amp breaker designed for dependable circuit protection in commercial and industrial electrical distribution systems. Built on the E42 frame, this breaker provides the correct form, fit, and function for compatible panelboards and equipment originally designed for this frame type. With an interrupting capacity of 18kA at 480VAC and 25kA at 240VAC, the E42B090 helps protect electrical circuits from overloads and short circuits while maintaining compatibility with existing installations. The bolt-on mounting configuration ensures a secure connection to the panelboard bus, and load-side terminals are included to simplify installation. Rated for 40°C environments and HACR applications, this molded case circuit breaker is commonly used in HVAC systems, commercial facilities, and industrial panels where dependable circuit protection and proper replacement compatibility are required. These breakers were built to last and remain a practical choice for maintaining legacy electrical systems.

Key Features and Benefits

• 90 Amp, 2-Pole Configuration: Designed for two-phase circuit protection in compatible electrical distribution systems.
• Bolt-On Mounting Design: Provides a secure mechanical and electrical connection to panelboard bus structures.
• Interrupting Capacity: Rated 18kA at 480VAC and 25kA at 240VAC for protection against fault conditions.
• E42 Frame Compatibility: Suitable for equipment designed to accept E42 frame molded case breakers.
• HACR Rated: Appropriate for heating, air conditioning, and refrigeration equipment circuits.
• 40°C Ambient Rating: Designed to operate under standard electrical room temperature conditions.
• Load-Side Terminals Included: Helps streamline installation and wiring.
• Built for Long Service Life: Constructed for durability in commercial and industrial electrical systems.

Technical Specifications

• Part Number: E42B090
  
• Breaker Type: Molded Case Circuit Breaker
  
• Frame Type: E42
  
• Poles: 2
  
• Amperage Rating: 90 Amps
  
• Interrupting Rating:
  • 18kA @ 480VAC
  • 25kA @ 240VAC
• Mounting Type: Bolt-On
  
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Terminals: Load-side terminals included
  
• Approximate Shipping Weight: 2.0 lbs
  
• Approximate Height: 6.35 in.
  

Material Compliance and Certifications

• Industry Standards: The E42B090 molded case circuit breaker is manufactured and tested to meet applicable electrical industry standards for molded case circuit protection.
• HACR Certification: HACR certification supports use in heating, air-conditioning, and refrigeration circuits where this rating is specified.
• Compliance: When installed in compatible equipment and according to electrical codes, it provides compliant circuit protection for commercial and industrial power distribution systems.

Where It Works Best

• Commercial panelboards and distribution panels
• Industrial electrical equipment and control panels
• HVAC power circuits requiring HACR-rated protection
• Maintenance and replacement in existing E42 breaker installations
• Facilities maintaining legacy electrical infrastructure
• Because it matches the electrical ratings and mounting style of the original design, the E42B090 serves as a form, fit, and functional replacement for compatible systems where maintaining the original breaker specification is necessary.