3MT8120-1AG27 Siemens Contactor AC-3 120A/55kW 400V size S6 Original Brand New

3MT8120-1AG27

Siemens Contactor AC-3, 120A/55kW,400V, 4NO4NC, 110 VAC, 50/60 Hz, 3-pole, size S6,screw terminal

Overview

Siemens 3MT8120-1AG27 is a heavy-duty AC‑3 contactor from Siemens’ SIRIUS series, tailored for industrial environments requiring robust motor switching capabilities. Designed as a Size S6 frame unit, it supports 120 A at 400 V AC and is capable of managing up to 55 kW three-phase AC-3 motor loads—ideal for powering medium-to-large motors in HVAC systems, compressors, pumps, and heavy machinery. This 3-pole contactor employs screw connections for main power conductors and includes auxiliary contacts (exact configuration varies, typically 1 NO + 1 NC or 2 NO + 2 NC) to integrate seamlessly with control circuits for signaling and interlocks

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