Siemens 3VA5120-6ED31-0AA0 Molded Case Circuit Breaker – 20A – 3 Pole – 600V – 3VA51 Frame

The Siemens 3VA5120-6ED31-0AA0 is a 3-pole molded case circuit breaker from the Siemens 3VA51 series, designed for low-voltage power distribution systems requiring high interrupting capacity and reliable thermal-magnetic protection.

This breaker features a compact 3VA51 frame with a high-performance Class H breaking capacity, making it suitable for industrial and commercial applications where fault levels are elevated. It is equipped with a TM210 thermal-magnetic trip unit with fixed long-time (Ir) and instantaneous (Ii) protection settings for dependable circuit protection.

Electrical Rating

• Current Rating: 20 Amps
• Maximum Voltage: 600 VAC (600Y/347 VAC systems supported)
• Number of Poles: 3 Pole
• Phase: 3 Phase
• Frame Type: 3VA51
• Interrupting Capacity:
  • 65 kA @ 480 VAC
  • 25 kA @ 600Y/347 VAC

Key Specifications

• Manufacturer: Siemens / ITE
• Catalog Number: 3VA5120-6ED31-0AA0
• Family: 3VA
• Device Type: Molded Case Circuit Breaker (MCCB)
• Trip Unit: TM210
• Protection Type: Thermal Magnetic
• Functions: NGC
• Connection Type: Feed-Thru
• Lug Provision: Without lugs (special configuration)

Protection Characteristics

• Thermal-magnetic protection for overload and short-circuit conditions
• Fixed long-time pickup (Ir) for overload protection
• Fixed instantaneous pickup (Ii) for high-speed fault interruption
• High interrupting capacity suitable for demanding industrial fault levels
• Reliable protection for feeder and distribution circuits
• Stable performance under high inrush and transient conditions

Construction & Design Features

• Compact Siemens 3VA51 frame design
• High-breaking Class H construction for enhanced fault handling
• Feed-thru connection configuration for flexible installation
• Factory-configured TM210 trip unit
• Durable molded case housing for mechanical strength and insulation
• Designed for panelboard and switchboard integration

Features & Benefits

• High interrupting capacity improves system safety during fault conditions
• Reliable thermal-magnetic protection without need for external electronics
• Compact footprint for space-efficient panel design
• Suitable for modernization and replacement applications
• Consistent performance in industrial and commercial environments
• Supports high fault current distribution systems

Mounting & Compatibility

• Compatible with Siemens 3VA panelboard and switchboard systems
• Feed-thru mounting configuration
• Suitable for distribution panels, MCCs, and power systems
• Designed for low-voltage industrial electrical installations

Applications

• Industrial power distribution systems
• Commercial electrical panels
• Motor feeder circuits
• Branch and feeder protection
• HVAC and mechanical systems
• High fault level electrical networks
• Retrofit and replacement breaker applications

Product Data

• Manufacturer: Siemens / ITE
• Part Number: 3VA5120-6ED31-0AA0
• Product Type: Molded Case Circuit Breaker (MCCB)
• Series: 3VA51
• Trip Unit: TM210
• Protection: Thermal Magnetic
• Poles: 3 Pole