Siemens 3VA9978-0AA11 Auxiliary Switch Contacts for 3VA4/5/6
Siemens auxiliary switch with HP changeover contacts for 3VA4/5/6 MCCBs.
The Siemens 3VA9978-0AA11 is an accessory featuring auxiliary switch changeover contacts of Type HP, with a 14 mm width. This component is designed as an add-on for Siemens 3VA4, 3VA5, and 3VA6 series molded case circuit breakers (MCCBs). It provides additional signaling or control contacts that mirror the status of the main circuit breaker.
These auxiliary switches are commonly used in control panels, motor control centers, and building automation systems. They offer crucial feedback for remote monitoring, interlocking, and signaling purposes, indicating whether the circuit breaker is open or closed. This enhances the safety and operational efficiency of electrical systems across various industries, including manufacturing, utilities, and commercial buildings.
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| Contact Type | Auxiliary Switch Changeover |
| Contact Rating | HP (14 mm) |
| Compatible With | Siemens 3VA4/5/6 Series MCCBs |