Siemens 3VA9988-0AA11 Auxiliary Switch Type HP 14 mm

The Siemens 3VA9988-0AA11 is a SENTRON auxiliary switch with changeover contacts, Type HP (14 mm). It is an accessory designed for compatible Siemens 3VA11-15 and 3VA20-26 molded case circuit breakers, where it adds an extra signaling contact for monitoring breaker status within the system. This is not the breaker itself. It is a compact signaling accessory used when the buyer needs a proper Siemens auxiliary contact instead of a workaround. That matters in OEM panels, switchboards, and maintenance replacements where correct fit and dependable switching data matter more than guessing with a generic part.