Mitsubishi S-N400 AC Magnetic Contactor, 3Pole 300A 250kW 2NO2NC Multi Optional Coil Voltage

Mitsubishi S-N400 AC Contactor

Mitsubishi S-N400 is a top-tier large-frame contactor in the professional Mitsubishi S-N series.

This Mitsubishi S-N400 unit delivers stable switching for ultra-large industrial three-phase motors.

Available Optional Coil Voltages (Front Display)

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

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

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

Industrial Application Coverage

This magnetic contactor serves ultra-large motor loads in heavy industrial manufacturing plants.

It controls high-power industrial pumps, blowers and central ventilation equipment.

The industrial contactor supports heavy processing machinery and large logistics systems.

It acts as core switching hardware for high-power industrial power distribution cabinets.

Core Technical Specifications

Electrical Performance Parameters

Operation type: AC coil operated non-reversing industrial contactor

Rated operational current: 300A at maximum 690V AC three-phase operation

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

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

AC-3 power rating: 125kW(240V), 220kW(440V), 250kW(690V)

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

Electrical service life: 500,000 standard AC3 load switching cycles

Mechanical & Structural Data

Mounting method: Screw fixed installation for stable heavy-load operation

Mechanical service life: 5,000,000 no-load switching operation cycles

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

Wiring mode: Heavy-duty screw-clamp terminal connection design

Protection grade: IP00 industrial standard open protection structure

Product dimensions: 163mm width, 243mm height, 195mm depth

Unit weight: 9.5kg per standalone contactor unit

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

Unique Product Strengths

Mitsubishi S-N400 multi-coil options adapt to diverse global industrial power grids.

This Mitsubishi S-N400 magnetic contactor supports 300A extreme heavy-load operation.

Complete 2NO2NC auxiliary contacts enrich interlock and remote signal functions.

Reinforced large frame structure resists vibration in harsh industrial environments.

High power rating meets demands of large-scale industrial automation systems.

Professional Installation & Usage Tips

Secure Mitsubishi S-N400 firmly on flat surfaces to avoid operational displacement.

Select matched AC coil voltage to prevent coil overheating and permanent damage.

Install professional surge suppressors to stabilize high-power switching circuits.

Inspect terminal connections regularly to eliminate loose connection faults.