3MT8250-1AC27 Siemens Contactor AC-3 250A/132kW 400V Size S10 Original Brand New

3MT8250-1AC27

Siemens Contactor AC-3,250A/132kW,400V, 4NO4NC, 24 VAC, 50/60 Hz, 3-pole,size S10,screw terminal

Overview

Siemens 3MT8250‑1AC27 is a heavy-duty Size S10 power contactor from the legacy SIRIUS 3RT1 family, crafted for AC‑3 motor-control applications up to 250 A, capable of switching motors up to 132 kW at 400 V. It features robust screw-type (or busbar-compatible) main terminals, with insulation rated to 690 V and surge withstand capability up to 6 kV, aligning with IEC 60947 standards for industrial reliability. Typically equipped with 2 NO + 2 NC auxiliary contacts for advanced control, interlocking, and signaling integration, it uses standard 220–240 V AC coil voltage—though variants exist.

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