E42B100 - 100Amp Circuit Breaker

E42B100 - 100Amp Circuit Breaker

Finding the right replacement circuit breaker isn't just about matching the amp rating—it's about making sure the breaker fits your existing system and delivers the protection your equipment was designed to use. The E42B100 is a 100 Amp, 2-pole molded case circuit breaker built for commercial and industrial electrical distribution applications where compatibility and dependable circuit protection matter.

Designed as a Type E42 bolt-on circuit breaker, the E42B100 helps protect electrical systems from overloads and short circuits while maintaining the original form, fit, and function of compatible equipment. With an interrupting capacity of 25kA at 240VAC and 18kA at 480VAC, it is well-suited for a wide range of electrical distribution and power management applications.

Whether you're replacing a failed breaker during maintenance, servicing facility equipment, or keeping an existing electrical system operating as intended, the E42B100 offers the ratings and configuration needed for many commercial and industrial environments. Like many molded case circuit breakers used throughout critical infrastructure, it is built to last when properly installed and maintained.

Key Features and Benefits

• 100 Amp current rating for commercial and industrial power distribution applications
• Two-pole design for disconnecting and protecting two conductors simultaneously
• Bolt-on mounting configuration for secure installation in compatible equipment
• HACR rated for use in qualifying HVAC and refrigeration applications
• Includes load-side terminals for added installation convenience
• Interrupting capacity of 25kA at 240VAC and 18kA at 480VAC
• Designed for operation in 40°C ambient environments
• Helps maintain the original form, fit, and function of existing electrical systems
• Suitable for maintenance, repair, and replacement projects
• Built to last in demanding electrical environments

Technical Specifications

• Part Number: E42B100
  
• Type: E42
  
• Product Type: Molded Case Circuit Breaker
  
• Amperage Rating: 100 Amps
  
• Poles: 2
  
• Mounting Style: Bolt-On
  
• A.I.C. Rating: 25kA @ 240VAC; 18kA @ 480VAC
  
• Operating Temperature: 40°C
  
• HACR Rated: Yes
  
• Included Accessories: Load-Side Terminals
  
• Width: 2.0 in
  
• Height: 6.35 in
  
• Depth: 3.92 in
  
• Dimensions: 2.0"W x 6.35"H x 3.92"D
  
• Approximate Shipping Weight: 4.31 lbs
  

Material Compliance and Certifications

• The E42B100 is a HACR-rated molded case circuit breaker designed for applications that meet its specified electrical ratings and installation requirements.
• Installation should be performed by qualified personnel and in accordance with applicable electrical codes, safety standards, and equipment manufacturer recommendations.

Where It Works Best

• Commercial buildings
• Manufacturing facilities
• Industrial power distribution systems
• HVAC and refrigeration equipment
• Electrical panelboards and distribution assemblies
• Facility maintenance programs
• Retrofit and replacement projects
• Applications requiring a compatible Type E42 breaker