HED43B040L - 40Amp Circuit Breaker

HED43B040L - 40Amp Circuit Breaker

Finding the correct replacement for your circuit breaker starts with matching the original electrical specifications. The Siemens HED43B040L is a 40 Amp, 3-pole molded case circuit breaker built for 480VAC three-phase electrical distribution systems. Part of the Siemens SENTRON ED frame family, it uses a thermal-magnetic trip unit to respond to both overloads and short circuits, helping protect your connected equipment and wiring.

Key Features and Benefits

• Siemens SENTRON ED frame molded case circuit breaker
• 40 Amp current rating
• Three-pole design for three-phase electrical systems
• Thermal-magnetic trip unit for overload and short-circuit protection
• Rated for 480VAC applications
• 42kAIC interrupting capacity at 480VAC
• Factory-installed line and load side lugs (LN1E100)
• Accepts 10 AWG to 1/0 AWG copper or aluminum wire
• Standard 40°C calibration
• Built to last for demanding commercial and industrial environments
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HED43B040L
  
• Manufacturer Part Number (MPN): HED43B040L
  
• Product Type: Molded Case Circuit Breaker
  
• Series: SENTRON ED Frame (HED4)
  
• Current Rating: 40 Amps
  
• Poles: 3
  
• Voltage Rating: 480VAC
  
• Frequency: 50/60 Hz
  
• Trip Unit: Thermal-Magnetic
  
• Interrupting Rating: 42kAIC @ 480VAC
  
• Terminal Type: Line and Load Side Lugs (LN1E100)
  
• Wire Range: 10 AWG–1/0 AWG Copper or Aluminum
  
• Calibration: Standard 40°C
  
• Dimensions (W × H × D): 3" × 6.35" × 3.92"
  
• Weight: 3.616 lbs.
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The Siemens HED43B040L is manufactured to meet UL 489 and IEC 60947-2 standards for molded case circuit breakers.

Where It Works Best

The HED43B040L is commonly used in commercial, industrial, and institutional electrical systems operating at 480VAC. It is suitable for compatible Siemens panelboards, switchboards, motor control centers, and other low-voltage distribution equipment where matching the original breaker's amperage, voltage, interrupting rating, frame size, and terminal configuration is important.