ED43B040L - 40Amp Circuit Breaker

ED43B040L - 40Amp Circuit Breaker

When you need a dependable replacement circuit breaker that matches the original specifications of your electrical system, the Siemens ED43B040L is designed to deliver the right fit and function. This 40 Amp, 3-pole molded case circuit breaker is part of Siemens' trusted Sentron ED frame family and helps protect electrical equipment from both overloads and short circuits using a built-in thermal magnetic trip unit.

Installation is made easier with factory-installed line and load side lugs (LN1E100), which accept 10 AWG to 1/0 AWG copper or aluminum conductors. The breaker is designed for operation in standard 40°C (104°F) ambient environments and is built to last, making it a dependable choice for compatible panelboards, switchboards, industrial machinery, and OEM equipment. If you're looking for a Siemens ED-frame breaker that maintains the original form, fit, and function of your existing installation, the ED43B040L is an excellent solution.

Key Features and Benefits

• Siemens Sentron ED frame molded case circuit breaker
• 40 Amp continuous current rating
• Three-pole design for three-phase electrical systems
• Thermal magnetic trip unit provides protection against overloads and short circuits
• 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
• Designed for standard 40°C (104°F) operating environments
• Built to last for long-term service in compatible electrical systems
• Maintains the original form, fit, and function of compatible Siemens ED-frame circuit breakers
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: ED43B040L
  
• Product Type: Molded Case Circuit Breaker
  
• Series: Sentron ED Frame (ED4)
  
• Trip Unit: Thermal Magnetic
  
• Current Rating: 40 Amps
  
• Voltage Rating: 480V AC
  
• Poles: 3
  
• Interrupting Capacity: 18kAIC @ 480V AC
  
• Terminal Type: Line and Load Side Lugs (LN1E100)
  
• Wire Range: 10 AWG to 1/0 AWG Copper/Aluminum
  
• Ambient Rating: 40°C (104°F)
  
• Dimensions:
  • Width: 3.00 in.
  • Height: 6.35 in.
  • Depth: 3.92 in.
• Weight: 3.801 lbs.
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The Siemens ED43B040L is manufactured to meet UL 489 and IEC 60947-2 standards for molded case circuit breakers, helping ensure compliance with recognized safety and performance requirements. It is also RoHS compliant and supports WEEE (2012/19/EU) take-back obligations where applicable. As with all electrical equipment, installation should be completed by qualified personnel and in accordance with the National Electrical Code (NEC) and all applicable local regulations.

Where It Works Best

• Commercial buildings
• Industrial facilities
• Manufacturing plants
• Panelboards
• Switchboards
• Three-phase 480V AC power distribution systems
• OEM equipment
• Motor control and distribution applications requiring a 40 Amp, 3-pole breaker
• Maintenance and replacement projects where maintaining the original electrical specifications is important