ED43B045L - 45Amp Circuit Breaker

ED43B045L - 45Amp Circuit Breaker

When you need a direct replacement breaker for an existing Siemens electrical system, the Siemens ED43B045L provides the ratings and compatibility required to maintain the original installation. This 45 Amp, 3-pole molded case circuit breaker is designed for 480V AC three-phase applications and features a thermal magnetic trip unit that helps protect circuits against overloads and short circuits. With an 18kA interrupting capacity (18kAIC) at 480V AC, it is suitable for use in compatible commercial and industrial electrical distribution systems. The breaker is equipped with factory-installed line and load side lugs (LN1E100) that accept 10 AWG to 1/0 AWG copper or aluminum conductors, helping simplify installation in compatible equipment. Whether replacing an existing breaker during maintenance or restoring equipment to its original configuration, this breaker offers a dependable solution for maintaining system continuity.

Key Features and Benefits

• Siemens Sentron ED frame molded case circuit breaker
• 45 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 line and load side lugs (LN1E100)
• Accepts 10 AWG to 1/0 AWG copper or aluminum conductors
• Standard 40°C (104°F) ambient temperature rating
• Built to last for long-term service in compatible electrical systems
• Designed to maintain the original form, fit, and function of compatible Siemens ED frame installations
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: ED43B045L
  
• Manufacturer Part Number (MFN): ED43B045L
  
• Product Type: Molded Case Circuit Breaker
  
• Series: Sentron ED Frame (ED4)
  
• Trip Unit: Thermal Magnetic
  
• Current Rating: 45 Amps
  
• Voltage Rating: 480V AC
  
• Poles: 3
  
• Interrupting Capacity: 18kAIC @ 480V AC
  
• Terminal Type: Line & Load Side Lugs (LN1E100)
  
• Wire Range: 10 AWG to 1/0 AWG Copper/Aluminum
  
• Ambient Temperature Rating: Standard 40°C (104°F)
  
• Dimensions:
  • Width: 3.00 inches
  • Length: 6.35 inches
  • Depth: 3.92 inches
• Net Weight: 3.00 lbs.
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The Siemens ED43B045L is manufactured to comply with UL 489 and IEC 60947-2 standards for molded case circuit breakers, helping ensure it meets recognized safety and performance requirements. It is RoHS compliant (since July 1, 2006) and supports WEEE (2012/19/EU) take-back obligations where applicable. Installation should always be performed by qualified personnel in accordance with the National Electrical Code (NEC), manufacturer recommendations, and all applicable local electrical codes.

Where It Works Best

• Commercial office buildings
• Manufacturing facilities
• Industrial plants
• Power distribution panels
• Switchboards
• Motor control equipment
• OEM machinery
• Facility maintenance and repair projects
• Existing Siemens ED frame electrical systems requiring a 45 Amp, 3-pole thermal magnetic circuit breaker
• Applications where preserving the original form, fit, and function of the electrical system is important