Siemens 3VA9978-0AA11 6A 600V Switch, Auxiliary Switch | AmpState

Meet the Siemens 3VA9978-0AA11 Auxiliary Switch — a dependable choice for everyday electrical work that excels in manual control and switching functions. Designed to integrate smoothly into control panels, this switch delivers reliable operation when you need precise, hands-on control.

Built for practical, real-world use, the 3VA9978-0AA11 handles up to 6 A at 600 V, making it suitable for control circuits and auxiliary signaling in a variety of industrial applications. Its compact auxiliary design keeps panel layouts clean while delivering consistent performance when you’re commissioning, testing, or performing routine maintenance.

Why this matters for your team and inventory:

• Direct part-number match — ensures quick, error-free replacements and streamlined procurement, reducing downtime and ordering confusion.
• 6 A at 600 V — a practical rating for auxiliary control tasks and signaling within control cabinets and automation enclosures.
• Auxiliary switch for manual control — ideal for maintenance, troubleshooting, and commissioning scenarios where hands-on operation is essential.
• Practical for professionals — a smart pick for maintenance teams, panel builders, and spare inventory where reliable, traceable parts matter.
• Available from AmpState — easy sourcing with support to confirm fit and compatibility for your Siemens systems.

If you’re unsure about compatibility, AmpState can help verify fit and ensure the 3VA9978-0AA11 aligns with your existing Siemens assemblies, so you can buy with confidence and minimize scheduling downtime.