ED42B040L - 40Amp Circuit Breaker

ED42B040L - 40Amp Circuit Breaker

Need a reliable replacement breaker that fits seamlessly into your existing electrical system? The Siemens ED42B040L is a 40 Amp, 2-pole molded case circuit breaker designed for use in compatible Siemens ED-frame panelboards and distribution equipment. Whether you're replacing an existing breaker as part of routine maintenance or restoring an electrical system to its original configuration, this breaker provides the form, fit, and function needed for a compatible installation without requiring panel modifications.

The ED42B040L features a thermal magnetic trip unit that helps protect electrical circuits by responding to both overloads and short-circuit conditions. Rated for 480V AC with an 18kA interrupting capacity (18kAIC), it is well suited for commercial and industrial applications where these ratings match system requirements.

Key Features and Benefits

• 40 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
• Includes line and load-side lug terminals (LN1E100)
• 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 applications
• Built to last in properly matched electrical systems
  

Technical Specifications

• Catalog Number: ED42B040L
  
• Manufacturer: Siemens
  
• Product Type: Molded Case Circuit Breaker
  
• Frame Type: ED
  
• Trip Unit: Thermal Magnetic
  
• Amperage Rating: 40 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 ED42B040L meets UL 489 and IEC 60947-2 standards for molded case circuit breakers, helping ensure compliance with recognized electrical safety requirements. It is subject to WEEE (2012/19/EU) take-back obligations where applicable, and Siemens provides REACH Article 33 information for material transparency. RoHS compliance information is not specified by the manufacturer for this model.
• Installation should always be performed by qualified electrical personnel in accordance with the National Electrical Code (NEC) and all applicable local regulations.
  

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 40 Amp, 2-pole molded case circuit breaker
• Projects where maintaining original equipment compatibility is important