ED43B090 - 90Amp Circuit Breaker

ED43B090 - 90Amp Circuit Breaker

The Siemens ED43B090 is a 3-pole, 90 Amp molded case circuit breaker designed to provide dependable overcurrent protection for 480V AC electrical distribution systems. Built with a thermal-magnetic trip unit, it responds to both sustained overloads and short-circuit conditions, helping protect electrical equipment and distribution systems while maintaining compatibility with existing Siemens ED frame installations. Whether you're replacing a breaker as part of routine maintenance or restoring an existing system to service, the ED43B090 is engineered as a form, fit, and functional replacement for compatible applications.

The Siemens ED43B090 is equipped with factory-installed load-side lugs (LN1E100), accepting 10 AWG through 1/0 AWG copper or aluminum conductors, making installation into compatible equipment straightforward.

Key Features and Benefits

• Siemens Sentron ED frame molded case circuit breaker
• 90 Amp continuous current rating
• Three-pole configuration for three-phase electrical systems
• Thermal-magnetic trip unit provides overload and short-circuit protection
• Rated for 480V AC applications
• 18kA interrupting capacity (18kAIC) at 480V AC
• Factory-installed load-side lugs (LN1E100)
• Accepts 10 AWG to 1/0 AWG copper or aluminum conductors
• Standard 40°C (104°F) ambient temperature rating
• Designed as a form, fit, and functional replacement for compatible Siemens ED frame installations
• Built to last for long-term use in commercial and industrial electrical systems
• Compact molded case design for installation in compatible electrical equipment
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: ED43B090
  
• Manufacturer Part Number (MFN): ED43B090
  
• Product Type: Molded Case Circuit Breaker
  
• Series: Sentron ED Frame (ED4)
  
• Trip Unit: Thermal-Magnetic
  
• Current Rating: 90 Amps
  
• Voltage Rating: 480V AC
  
• Poles: 3
  
• Interrupting Rating: 18kAIC @ 480V AC
  
• Terminal Type: Load Side Lugs (LN1E100)
  
• Wire Range: 10 AWG–1/0 AWG Copper or Aluminum
  
• Ambient Temperature Rating: 40°C (104°F)
  
• Dimensions:
  • Width: 3.00 inches
  • Length: 6.35 inches
  • Depth: 3.92 inches
• Net Weight: 0.34 lbs.
  
• Country of Origin: Mexico
  
• UPC: 783643209473

Material Compliance and Certifications

The Siemens ED43B090 is manufactured to comply with UL 489 and IEC 60947-2 standards for molded case circuit breakers, helping ensure it meets established industry requirements for low-voltage circuit protection. The breaker is RoHS compliant (since July 1, 2006) and meets applicable WEEE (2012/19/EU) environmental obligations. Installation should always be performed by qualified personnel in accordance with the National Electrical Code (NEC), manufacturer instructions, and all applicable local electrical codes.

Where It Works Best

• Commercial buildings
• Industrial facilities
• Manufacturing plants
• Electrical distribution panels
• Switchboards
• Motor control centers (MCCs)
• OEM machinery
• Facility maintenance and repair projects
• Compatible Siemens ED frame installations requiring a 90 Amp, 3-pole thermal-magnetic circuit breaker with load-side lugs