Stromberg SpA SPAU40C2 Voltage Relay

Stromberg SpA SPAU40C2 Voltage Relay is a voltage-sensing relay identified by the model SPAU40C2 from the Stromberg SPAU family. The device is documented in online listings as a Stromberg voltage relay, confirming its role as a dedicated component for monitoring electrical voltage conditions and interfacing with other control or protection equipment in an electrical installation. Within the SPAU lineage, related variants such as SPAU 400 C2 are shown rated for 220V, 50Hz operation, illustrating the family’s alignment with standard mains voltage applications and practical integration in power systems. The SPAU40C2 designation appears in catalog listings and marketplace entries, underscoring its function as a voltage relay and its place alongside other SPAU devices used to supervise voltage levels in electrical circuits.