HED43B020L - 20Amp Circuit Breaker

HED43B020L - 20Amp Circuit Breaker

The Siemens HED43B020L is a 20 Amp, 3-pole molded case circuit breaker from the SENTRON ED frame family, designed to provide dependable circuit protection in 480VAC commercial and industrial electrical distribution systems. Manufactured to meet UL 489 and IEC 60947-2 standards, this breaker is intended for use as a form, fit, and functional replacement in compatible Siemens electrical equipment. Whether you're performing scheduled maintenance, replacing a failed breaker, or maintaining spare inventory for existing systems, the HED43B020L is built to last and helps maintain the original electrical design and protection requirements.

Key Features and Benefits

• Siemens SENTRON ED frame molded case circuit breaker
• 20 Amp current rating
• Three-pole design for three-phase electrical systems
• Thermal-magnetic trip unit provides overload and short-circuit protection
• Rated for 480VAC applications
• Includes line- and load-side lugs (SA1E025) for installation flexibility
• Accepts 14–10 AWG copper conductors
• Accepts 12–10 AWG aluminum conductors
• Standard 40°C calibration
• Built to last for demanding commercial and industrial environments
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HED43B020L
  
• Product Family: SENTRON ED Frame
  
• Product Type: Molded Case Circuit Breaker
  
• Frame Size: ED
  
• Amperage: 20 Amps
  
• Number of Poles: 3
  
• Voltage Rating: 480VAC
  
• Trip Unit: Thermal-Magnetic
  
• Interrupting Capacity: 42kAIC @ 480VAC
  
• Terminal Configuration: Line and Load Side Lugs (SA1E025)
  
• Copper Wire Range: 14–10 AWG
  
• Aluminum Wire Range: 12–10 AWG
  
• Standard Calibration Temperature: 40°C
  
• Dimensions (W × H × D): 3 in. × 6.35 in. × 3.92 in.
  
• Weight: 3.616 lbs
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The Siemens HED43B020L is manufactured in accordance with UL 489 and IEC 60947-2 standards for molded case circuit breakers. The product also includes REACH Article 33 information as provided by the manufacturer. Designed for use in compatible Siemens electrical distribution equipment, this breaker should be installed only where the required ED frame, 20 Amp, 3-pole, 480VAC, 42kAIC, and line- and load-side lug configuration matches the original equipment specifications.

Where It Works Best

The Siemens HED43B020L is well suited for commercial, industrial, and institutional electrical distribution systems operating on 480VAC three-phase power. It is commonly used in compatible Siemens panelboards, switchboards, motor control equipment, and other distribution systems requiring an ED frame molded case circuit breaker with a 20 Amp rating, 42kAIC interrupting capacity, and line- and load-side lug configuration.