Siemens 3VA5120-6EF31-0AA0 Circuit Breaker, 20A, 3-Pole, 480V

The Siemens 3VA5120-6EF31-0AA0 is a rugged, industrial-grade circuit breaker engineered for service, maintenance, and replacement projects. With a 20 A rating across a 3-pole configuration and a 480 V operating capability, this device delivers reliable protection for three-phase systems in demanding environments.

Key specifications

• Manufacturer: Siemens
• Part number: 3VA5120-6EF31-0AA0
• Product type: Circuit Breaker
• Amperage: 20 A
• Poles: 3
• Voltage: 480 V

Ideal uses and scenarios

• Replacement in three-phase electrical panels, motor control centers, and distribution boards that run at 480 V
• New installations for machinery, conveyors, pumps, and automated lines requiring dependable overload and short-circuit protection
• Maintenance projects where matching an exact Siemens part number ensures compatibility with existing trip characteristics and mounting fit

Why this part stands out

Designed to integrate seamlessly with Siemens electrical infrastructure, the 3VA5120-6EF31-0AA0 delivers consistent protection for three-phase loads while supporting straightforward installation in compatible panels and busbar layouts. The 20 A rating is well-suited for protecting control circuits and small to medium motors fed from a 480 V network, helping minimize downtime from electrical faults and overloads.

Compatibility and installation tips

• Verify fit using the exact part number 3VA5120-6EF31-0AA0 against your application requirements.
• Prefer Siemens-compatible panels, busbars, and accessories to ensure proper mounting and reliable electrical contact.
• When replacing an existing breaker, compare mounting dimensions and trip configuration to reduce installation time and downtime.

Need help confirming compatibility? Message us with your application details and the part number, and we’ll help verify fit and recommend the best installation approach. Important safety note: install by qualified personnel in accordance with local electrical codes and safety standards.