Siemens AG 3TH4373-0A Control Contactor Relay

Siemens 3TH4373-0A is a 10‑pole control relay from the SIRIUS 3TH43 family, featuring seven normally open and three normally closed auxiliary contacts for expanded control signaling. It operates on a 230 V AC control coil with a 16 A rating under AC‑1 duty at 50/60 Hz, making it suitable for switching common resistive and lightly inductive loads in automation circuits. The unit uses screw‑terminal connections and is designed for DIN rail mounting on 35 mm profiles (DIN EN 50022), with overall dimensions of 78 mm (H) × 55 mm (W) × 102 mm (D). The housing combines white and black for panel visibility and the product carries the 73E switching element designation under EN 50011.