ED42B090 - 90Amp Circuit Breaker

ED42B090 - 90Amp Circuit Breaker

Need a dependable replacement circuit breaker for your existing Siemens electrical system? The Siemens ED42B090 is a 90 Amp, 2-pole molded case circuit breaker designed to provide reliable overcurrent protection in commercial and industrial electrical distribution systems. Whether you're maintaining existing equipment or replacing a compatible breaker, the ED42B090 offers a true form, fit, and functional replacement for Siemens ED-frame applications, helping simplify maintenance while preserving compatibility with your installed system.

Equipped with a thermal magnetic trip unit, the ED42B090 helps protect electrical circuits by responding to both sustained overloads and instantaneous short circuits.

Key Features and Benefits

• 90 Amp continuous current rating
• 2-pole configuration for 480V AC applications
• Thermal magnetic trip unit helps protect against overloads and short circuits
• Rated for use in 480V AC electrical distribution systems
• 18kA interrupting capacity (18kAIC) at 480V AC
• Equipped with load-side lug terminals (LN1E100)
• Accepts 10–1/0 AWG copper or aluminum conductors
• Standard 40°C breaker design
• Designed as a form, fit, and functional replacement for compatible Siemens ED-frame equipment
• Built to last for dependable, long-term use in compatible electrical systems
  

Technical Specifications

• Catalog Number: ED42B090
  
• Manufacturer: Siemens
  
• Product Type: Molded Case Circuit Breaker
  
• Series / Frame: ED Frame
  
• Trip Unit: Thermal Magnetic
  
• Amperage Rating: 90 Amps
  
• Voltage Rating: 480V AC
  
• Number of Poles: 2
  
• Interrupting Rating: 18kAIC at 480V AC
  
• Terminal Type: Load Lugs Only (LN1E100)
  
• Wire Range: 10–1/0 AWG Copper/Aluminum
  
• Reference Operating Temperature: 40°C
  
• Dimensions:
  • Width: 2.00 in.
  • Height: 6.35 in.
  • Depth: 3.92 in.
• Weight: 2.63 lb.
  
• Product Family: ED4 18kAIC, 480VAC
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

• The Siemens ED42B090 is manufactured to meet UL 489 and IEC 60947-2 standards for molded case circuit breakers, supporting recognized safety and performance requirements. It is RoHS compliant (since July 1, 2006), is subject to WEEE (2012/19/EU) take-back obligations where applicable, and includes REACH Article 33 information to support material transparency.
• For safe installation and operation, this circuit breaker should be installed by qualified electrical personnel in accordance with the National Electrical Code (NEC) and all applicable local electrical codes.
  

Where It Works Best

• Siemens ED-frame panelboards and compatible electrical distribution equipment
• Commercial electrical distribution systems
• Industrial power distribution applications
• 480V AC branch circuit protection
• Maintenance and repair of existing electrical systems
• Replacement of compatible Siemens ED-frame molded case circuit breakers
• Facilities requiring a 90 Amp, 2-pole breaker with an 18kA interrupting capacity
• Applications utilizing load-side lug connections
• Installations where maintaining original equipment compatibility is important