ED42B045L - 45Amp Circuit Breaker

ED42B045L - 45Amp Circuit Breaker

The Siemens ED42B045L is a 45 Amp, 2-pole molded case circuit breaker designed for use in compatible Siemens ED-frame panelboards and power distribution systems. Whether you're replacing an existing breaker as part of routine maintenance or servicing a legacy electrical installation, this breaker provides the form, fit, and functional replacement needed to maintain your original equipment configuration. Built to last, the ED42B045L is intended for dependable operation in properly matched commercial and industrial applications.

This breaker features a thermal magnetic trip unit that responds to both sustained overloads and instantaneous short circuits, helping protect electrical equipment and branch circuits.

Key Features and Benefits

• 45 Amp, 2-pole Siemens ED frame molded case circuit breaker
• Thermal magnetic trip unit for reliable overload and short-circuit protection
• Rated for 480V AC commercial and industrial applications
• 18kA interrupting capacity (18kAIC) at 480V AC
• Line and load-side lug terminals (LN1E100) for compatible installation
• Accepts 10–1/0 AWG copper or aluminum conductors
• Designed for use with compatible Siemens ED-frame equipment
• Helps maintain original panel configuration during replacement
• Form, fit, and functional replacement for compatible systems
• Built to last in properly matched electrical applications
  

Technical Specifications

• Catalog Number: ED42B045L
  
• Manufacturer: Siemens
  
• Product Type: Molded Case Circuit Breaker
  
• Frame Type: ED
  
• Trip Unit: Thermal Magnetic
  
• Amperage Rating: 45 Amps
  
• Voltage Rating: 480V AC
  
• Poles: 2
  
• Interrupt Rating: 18 kAIC at 480V AC
  
• Terminal Type: Line and Load Lug Terminals (LN1E100)
  
• Wire Range: 10–1/0 AWG Copper / Aluminum
  
• Operating Temperature Reference: Standard 40°C Breaker
  
• Dimensions: 2.00 in. W × 6.35 in. H × 3.92 in. D
  
• Weight: 2.712 lb
  
• Product Family: ED4 18kAIC, 480VAC
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

• The Siemens ED42B045L meets UL 489 and IEC 60947-2 standards for molded case circuit breakers, helping ensure compliance with recognized electrical safety and performance requirements. It is subject to WEEE (2012/19/EU) take-back obligations where applicable, and Siemens provides REACH Article 33 information to support material transparency.
• Installation should always be completed by qualified electrical professionals in accordance with the National Electrical Code (NEC) and all applicable local electrical codes.
  

Where It Works Best

• Siemens ED-frame panelboards and distribution equipment
• Commercial electrical distribution systems
• Industrial power distribution panels
• 480V AC branch circuit protection
• Replacement of existing compatible Siemens ED-frame breakers
• Maintenance and repair of installed electrical systems
• Applications requiring a 45 Amp, 2-pole molded case circuit breaker
• Projects where maintaining original equipment compatibility is essential