ED43B020 - 20Amp Circuit Breaker

ED43B020 - 20Amp Circuit Breaker

If you need a reliable replacement breaker that fits your existing setup, the Siemens ED43B020 is a solid choice. Designed as a form, fit, and functional replacement for Siemens ED-frame systems, this 20 Amp, 3-pole molded case circuit breaker helps keep your electrical system running safely without requiring major changes.

Part of the Siemens Sentron ED frame line, the ED43B020 uses a thermal magnetic trip unit to handle both overloads and short circuits. The thermal side reacts to prolonged overcurrent conditions, while the magnetic side responds quickly to sudden faults.

Key Features and Benefits

• Siemens Sentron ED frame molded case circuit breaker
• 20 Amp continuous current rating
• 3-pole design for three-phase systems
• Thermal magnetic trip unit for overload and short-circuit protection
• Rated for 480V AC applications
• 18kA interrupting capacity (18kAIC) at 480V AC
• Includes load lugs only (SA1E025)
• Accepts 14–10 AWG copper and 12–10 AWG aluminum conductors
• Designed for standard 40°C operating conditions
• Direct replacement for compatible Siemens ED-frame breakers
• Durable construction for commercial and industrial use
  

Technical Specifications

• Catalog Number: ED43B020
  
• Manufacturer: Siemens
  
• Product Type: Molded Case Circuit Breaker
  
• Series / Frame: Sentron ED Frame
  
• Trip Unit: Thermal Magnetic
  
• Amperage Rating: 20 Amps
  
• Voltage Rating: 480V AC
  
• Number of Poles: 3
  
• Interrupting Rating: 18kAIC at 480V AC
  
• Terminal Type: Load Lugs Only (SA1E025)
  
• Wire Range: 14–10 AWG Copper / 12–10 AWG Aluminum
  
• Reference Operating Temperature: 40°C
  
• Dimensions:
  • Width: 3.00 in.
  • Height: 6.35 in.
  • Depth: 3.92 in.
• Weight: 3.713 lb.
  
• Product Family: ED4 18kAIC, 480VAC
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The Siemens ED43B020 meets UL 489 and IEC 60947-2 standards for molded case circuit breakers. It is RoHS compliant and aligns with WEEE (2012/19/EU) requirements where applicable. Material details are available per REACH Article 33 guidelines. Installation should always be handled by qualified personnel and follow NEC and local electrical codes.

Where It Works Best

• Siemens ED-frame panelboards and switchboards
• Commercial and industrial power distribution systems
• 480V AC branch circuit protection
• Warehouses, manufacturing plants, and commercial buildings
• Maintenance or replacement of existing Siemens ED-frame breakers
• Applications needing a 20 Amp, 3-pole breaker with 18kAIC rating
• Systems using load lug connections
• Installations where maintaining original equipment compatibility matters