E42B090L - 90Amp Circuit Breaker

E42B090L - 90 Amp Circuit Breaker

The E42B090L molded case circuit breaker is designed to provide dependable circuit protection for electrical distribution systems operating in commercial and industrial environments. Built on the E42 frame platform, this 2-pole, 90-amp breaker is intended as a form-fit-function replacement for compatible legacy installations where maintaining the original panel design and electrical ratings is important. With interrupting ratings of 18kA at 480VAC and 25kA at 240VAC, the E42B090L helps protect equipment and conductors from overloads and short circuits while supporting stable operation in existing power systems. Rated for 40°C operation and HACR applications, it is suitable for heating, air-conditioning, and refrigeration circuits commonly found in facilities management and mechanical systems. The unit includes line and load-side terminals, allowing straightforward installation in panels and switchboards designed for E42 frame breakers. Molded case breakers like the E42B090L are built with durable internal components and insulating housings intended for long service life in properly maintained electrical systems.

Key Features and Benefits

• 90 Amp continuous current rating: suitable for many commercial and industrial branch circuits
• 2-pole configuration: designed for two-phase or split-phase protection applications
• Interrupting capacity: 18kA at 480VAC and 25kA at 240VAC for fault protection in distribution systems
• E42 frame compatibility: supports form, fit, and functional replacement in existing panels and switchgear
• HACR rated: for heating, air-conditioning, and refrigeration equipment circuits
• 40°C ambient temperature rating: aligned with typical electrical equipment environments
• Molded case housing: helps protect internal components and provides electrical insulation
• Includes line and load-side terminals: for installation within compatible electrical assemblies
• Designed and manufactured with durable materials: commonly used in long-service electrical protection devices

Technical Specifications

• Part Number: E42B090L
  
• Frame Type: E42
  
• Breaker Type: Molded Case Circuit Breaker
  
• Poles: 2
  
• Current Rating: 90 Amperes
  
• Interrupting Rating:
  • 18kA @ 480VAC
  • 25kA @ 240VAC
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Terminals: Includes line and load-side terminals
  
• Approximate Shipping Weight: 2.0 lbs
  
• Approximate Dimensions: Height: 6.35 in
  

Material Compliance and Certifications

• HACR Rated: for HVAC and refrigeration circuit protection
• Construction Standards: Designed to meet common molded case circuit breaker construction standards used in commercial and industrial electrical equipment
• Insulated Housing: Built with insulated molded housing materials typical of circuit protection devices used in panelboards and switchgear
  

Where It Works Best

• The E42B090L circuit breaker is commonly used in electrical distribution systems where E42 frame breakers are already installed and maintaining compatibility with existing equipment is required.
• Commercial building panelboards and switchboards
• HVAC and refrigeration circuits requiring HACR-rated protection
• Industrial motor and equipment branch circuits within rated capacities
• Maintenance and replacement projects in legacy electrical systems
• Facility electrical infrastructure where matching frame type, amperage, and interrupting ratings is necessary for safe operation
• This breaker is intended for installations that require the same form, fit, and electrical characteristics as an E42 frame 90-amp, 2-pole breaker, helping maintain proper protection and coordination within established electrical systems.