Explosion-Proof Motors

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0.12kW to 0.75kW (S1 duty)

Up to 1.2kW (S2 duty)


1500,1800 & 3000RPM

(other speeds available on request)

Ambient range

-20°C to +58°C (S1 duty)

-20°C to +60°C (S2 duty)


B3, B5, B34, B35

(Custom available on request)

Frame size

IEC 90 (90mm centre height)

STS Motors are a leading designer and manufacturer of ATEX & IECEx certified explosion-proof motors. Our motors are used world-wide in hazardous locations – typically in oil and gas pipelines, offshore production platforms and petro-chemical installations.

Our Ex d motors are produced in different frame sizes providing outputs from 0.18kW to 6.5kW. The motors are designed to cover a wide speed and voltage range with particular emphasis on low voltage battery / solar panel fed motors for pump drives of 24V.

Supply and output

Available in 24V and 110-120V variants

  • 24V – 0.20kW to 1.87kW
  • 110V to 120V – 1.5kW to 6.5kW


  • Zone 1, gas groups I & IIB (gas group I only available on 110-120V variants),
  • Temperature classification – T4
  • Ambient temperature range
    • Standard -20°C to +40°C
    • High ambient -20°C* to +58°C / 60°C (dependent on duty rating)
    • Extreme -40°C to +57°C / 60°C (dependent on duty rating and variant)


  • IP54 to IP56 – dependent on variant.

Frame sizes and mounting

  • Produced in IEC frame sizes with IEC, NEMA or custom flange / face mounting, with or without feet.

Manufacturing standards

  • Manufactured and tested in line with the requirements of the IEC/EN60034-1, IEC/EN60079-0 and IEC/EN60079-1.

Optional peripheral equipment

  • In-line or right-angle drive gearboxes and pumps can be supplied fitted.