Mitsubishi S-T50 AC Magnetic Contactor, 3Pole 50A 22kW 2NO2NC Multi Optional Coil Voltage

Mitsubishi S-T50 AC Contactor

Mitsubishi S-T50 is a high-load mid-frame AC magnetic contactor in the upgraded S-T series lineup.

This S-T50 unit delivers stable switching for medium to heavy industrial three-phase motor loads.

Available Optional Coil Voltages (Front Display)

AC100V (100–127V wide range for low-voltage industrial AC control circuits)

AC200V (200–240V wide range for mainstream global industrial AC systems)

AC400V (380–440V wide range for high-voltage three-phase power equipment)

Unique Product Strengths

Mitsubishi S-T50 adopts optimized mini-width frame to save cabinet installation space.

This contactor supports three universal AC coil voltages for global industrial site matching.

Standard 2NO2NC auxiliary contacts enable complex interlock and signal feedback control.

Advanced arc runner structure enhances heat dissipation and switching safety performance.

Ultra-long mechanical durability reduces routine maintenance and operational downtime.

Core Technical Specifications

Electrical Performance Parameters

Operation type: AC coil operated non-reversing industrial contactor

Rated AC-3 operational current: 50A at 200V three-phase industrial operation

Universal rated current: 26A at maximum 690V AC industrial working voltage

Main pole configuration: 3-pole mid-frame heavy-duty industrial main circuit structure

Auxiliary contact layout: 2NO + 2NC multi-functional signal control contacts

AC-3 power rating: 15kW(240V), 22kW(440V), 22kW(690V)

Operating frequency: 50Hz and 60Hz dual universal frequency compatibility

Mechanical service life: 10,000,000 no-load switching operation cycles

Electrical service life: 100,000 standard AC3 load switching cycles

Mechanical & Structural Data

Mounting method: Standard 35mm DIN rail and screw fixed dual installation

Operating temperature range: -10°C to +40°C standard ambient environment

Wiring mode: Stable screw-clamp terminal connection industrial design

Protection grade: IP20 finger-safe and dust-proof safety protection structure

Product dimensions: 75mm width, 89mm height, 91mm depth

Unit weight: 0.55kg per standalone contactor unit

Compliance standards: EN60947-4-1, IEC60947-4-1, JIS C8201-4-1

Industrial Application Coverage

This magnetic contactor controls heavy-duty industrial pumps and large ventilation fan systems.

It provides reliable power switching for medium processing and automated packaging machinery.

The industrial contactor fits standard automation panel layouts for space-saving assembly.

It supports stable circuit control for mid-sized factory automation production lines.

Professional Installation & Usage Tips

Mount Mitsubishi S-T50 firmly on DIN rails for standardized industrial assembly.

Select matched AC coil voltage to prevent coil overheating and unexpected circuit faults.

Install surge suppressors to filter transient voltage spikes in control circuits.

Inspect terminal tightness regularly to maintain long-term stable circuit connection.