3RT1065-6-6 is a heavy-duty 3-pole power contactor belonging to Siemens SIRIUS 3RT S10 series, specially designed for high-power three-phase motor switching and heavy industrial load control. It carries AC-3 rated current up to 265A with 132kW power capacity at 400V, equipped with standard 2NO+2NC auxiliary contacts for signal feedback and interlock logic. Supporting both AC and DC coil drive modes, this contactor adopts robust screw terminal & busbar connection structure, built-in overvoltage and surge protection, and complies with IEC 60947-4-1, UL and CE standards. It features wide operating temperature range, strong shock resistance and long mechanical service life, widely applied in pump, fan, conveyor and metallurgical automation control cabinets.