3VA4120-4ED34-0AA0 - 20Amp Circuit Breaker

3VA4120-4ED34-0AA0  -  20Amp Circuit Breaker

When you're protecting electrical systems, you don’t want surprises—you want consistency. The Siemens 3VA4120-4ED34-0AA0 is built for exactly that. This 3-pole molded case circuit breaker delivers dependable 20-amp line protection with a straightforward, fixed trip setup that keeps things simple and predictable. No tweaking, no second-guessing—just solid performance where it counts. Part of Siemens’ 3VA4 series, this breaker is designed for real-world applications where space is tight but performance still matters. With a 25kA interrupting rating at 480V, it’s ready to handle serious fault conditions while protecting your equipment and wiring. The built-in thermal-magnetic trip unit does exactly what it should—responds quickly to overloads and short circuits without unnecessary complexity. If you're outfitting a panel or replacing a unit that needs to just work, this is a reliable choice.

Key Features and Benefits

• Fixed 20A Rating – No adjustments needed; what you install is exactly what you get
• 25kA @ 480V Interrupting Capacity – Handles high fault levels with confidence
• Thermal-Magnetic Trip (TM210) – Proven protection for both overloads and short circuits
• 3-Pole Design – Ideal for standard three-phase systems
• Compact Frame 125 Size – Fits easily into tight panel spaces
• Fast Short-Circuit Response – Instantaneous trip set at 15x rated current
• Built for Line Protection – Helps safeguard wiring and downstream components
• Backed by Siemens – Known for consistent, field-proven electrical products

Technical Specifications

• Catalog Number: 3VA4120-4ED34-0AA0
  
• Series: Siemens 3VA4
  
• Frame Size: 125
  
• Poles: 3
  
• Rated Current: 20A
  
• Overload Protection (Ir): Fixed at 20A
  
• Short-Circuit Protection (Ii): 15 × In
  
• Interrupt Rating: 25 kA @ 480V
  
• Trip Unit: TM210 (Thermal-Magnetic)
  
• Connection Type: Terminal
  
• Dimensions: 160 x 135 x 88 mm
  
• Weight: 0.743 kg
  

Material Compliance and Certifications

• RoHS compliant (since 2017)
• REACH compliant with required substance disclosure
• WEEE compliant for responsible end-of-life handling
• Built to meet applicable UL standards for North American use

Where It Works Best

This breaker is mainly used for:

• Commercial electrical panels
• Industrial machinery and control systems
• OEM equipment builds
• Facility maintenance replacements
• Tight enclosures where space matters