Siemens 3VA99780AB12 6A 300V Switch, Auxiliary Switch | AmpState

Introducing the Siemens 3VA99780AB12 Auxiliary Switch — a purpose-built companion for Siemens control assemblies designed to keep your electrical systems moving. With a 6 A amperage rating and a 300 V voltage rating, this compact auxiliary contact block delivers reliable signaling and switching support in everyday control tasks.

Specifically engineered for manual control and switching functions, this auxiliary switch is the dependable choice for replacement projects and maintenance spares. It helps you preserve the original bill of materials (BOM) and maintain consistent control logic, so panel refurbishments or service calls stay on schedule without compatibility concerns.

Key details

• Manufacturer: Siemens
• Part number: 3VA99780AB12
• Type: Auxiliary switch
• Amperage: 6 A
• Voltage: 300 V

Why this auxiliary switch stands out

• Direct compatibility with Siemens 3VA control assemblies, ensuring a drop-in fit without modifications.
• Supports reliable manual control signals and straightforward switching tasks in control panels, MCCs, and automation racks.
• Facilitates quick BOM-aligned replacements, reducing downtime during maintenance and upgrades.
• Compact, unobtrusive form factor that integrates cleanly with existing wiring and enclosure layouts.

Ideal use cases

• Maintenance and spare stocking for industrial control panels that rely on Siemens 3VA auxiliary contacts.
• Replacement of a worn or failed auxiliary switch within motor control centers or automation cabinets.
• Legacy system upgrades where preserving original control logic and signaling behavior is essential.

AmpState offers straightforward compatibility support: if you’re unsure about fit, reach out and we’ll help verify that 3VA99780AB12 matches your equipment’s requirements. Equip your service team with a genuine Siemens auxiliary switch ready to install and restore reliable control performance.