HED43B020 - 20Amp Circuit Breaker

HED43B020 - 20Amp Circuit Breaker

The Siemens HED43B020 is a 20 Amp, 3-pole molded case circuit breaker from the SENTRON ED frame product line, designed for use in 480VAC electrical distribution systems. Featuring a thermal-magnetic trip unit, it provides protection against overloads and short circuits while delivering a 42kA interrupting capacity at 480VAC for applications where higher available fault current ratings are required. Whether you're replacing an existing breaker as part of routine maintenance or maintaining spare inventory for compatible equipment, this model is designed to provide the same form, fit, and function as the original Siemens device.

Key Features and Benefits

• Siemens SENTRON ED frame molded case circuit breaker
• 20 Amp current rating
• Three-pole configuration for three-phase electrical systems
• Thermal-magnetic trip unit for overload and short-circuit protection
• Rated for 480VAC applications
• Includes load-side lugs (SA1E025)
• Accepts 14–10 AWG copper conductors
• Accepts 12–10 AWG aluminum conductors
• Standard 40°C calibration
• Designed as a form, fit, and function replacement for compatible Siemens equipment
• Built to last for commercial and industrial electrical applications

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HED43B020
  
• Product Family: SENTRON
  
• Product Type: Molded Case Circuit Breaker
  
• Frame: ED
  
• Amperage: 20 Amps
  
• Poles: 3
  
• Voltage Rating: 480VAC
  
• Trip Unit: Thermal-Magnetic
  
• Interrupting Rating: 42kAIC @ 480VAC
  
• Terminals: Load-Side Lugs (SA1E025)
  
• Copper Wire Range: 14–10 AWG
  
• Aluminum Wire Range: 12–10 AWG
  
• Operating Temperature: Standard 40°C
  
• Dimensions: 3 in. W × 6.35 in. H × 3.92 in. D
  
• Weight: 3.6 lbs
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The Siemens HED43B020 complies with UL 489 and IEC 60947-2 standards for molded case circuit breakers. It is RoHS compliant (since April 2, 2009) and is manufactured for use in compatible Siemens electrical distribution equipment requiring an ED frame, 20 Amp, 3-pole, 480VAC, and 42kAIC circuit breaker. Confirm compatibility with the existing equipment before installation.

Where It Works Best

The Siemens HED43B020 is well suited for commercial and industrial electrical distribution systems operating on 480VAC three-phase power. It is commonly installed in compatible Siemens panelboards, switchboards, and other distribution equipment where an ED frame circuit breaker with matching electrical ratings is specified.