The Siemens 3VA9987-0TG10 is a SENTRON T connector accessory designed for the 3VA molded-case circuit breaker family. It serves a communication and measurement function, allowing the breaker to interface with monitoring or control systems for power data collection and remote status.
Snaps onto the 3VA breaker's accessory slot; no additional DIN-rail footprint consumed beyond the breaker itself.
