Explosion-proof Motors

Maximum safety and extreme ruggedness

General description

With the explosion-protected motors from Siemens you are going further than the basic safety requirements: our rugged EEx motors operate completely reliably even under the most extreme conditions – and this has been proven worldwide a hundred thousand times over. And what is more, there are no gaps in our EEx motor range, they meet all requirements with maximum safety and high efficiency during operation.

We offer drive solutions with double protection for exceptional requirements. The result: A portfolio of motors that is globally unrivalled in terms of scope and standard.

Technical data overview

Brief overview

Increased safety"e"

Increased safety"d"

Increased safety"n"

Dust explosion protection


Voltage range:

0.12 - 165 kW

0.25 - 950 kW

0.09 - 1000 kW

0.06 - 1000 kW

1 - 300 HP

Power ranges:

All commonly used voltages

230, 460 & 575 V with 60 Hz

Frame size:

63 M - 315 L

71 M - 450

63 M - 450

56 M - 450

140 - 440


All common construction types

Rated speed:

750 - 3600 min-1

900-3600 min-1

Rated torque:

0.3 - 10300 Nm

1.5-1772 lb-ft

Application area:

Ex-Zone 1 II 2G Ex e II T1-T3

Ex-Zone 1 II 2G Ex de IIC T1-T6

Ex-Zone 2 II 3G Ex nA II T3

Ex-Zone 21/22 Zone 21: II 2D Ex tD A21 IP65 T120°C Zone 22: II 3D Ex tD A22 IP55 T120°C

Class I, Group D, Class II, Groups F&G Division 1 hazardous areas

Customer benefits

Type spectrum IEC

Our explosion-protected motors fulfill the ATEX 95 directive:

   - Integrated gray cast iron series for standard and explosion-protected motors

   - Motors with “increased safety” – “e” (Ex e II) type of protection, Motors with flameproof enclosure – “d” (Ex de IIC), Motors in non-sparking design – “n” (Ex nA) and Motors with dust explosion protection for Zone 21/22

 Type spectrum NEMA

Explosion-proof motors fulfill the strict requirements according to:

  - Class I, Group D

  - Class II, Groups F&G

  - Division 1, hazardous areas

Typical applications

In hazardous environments, such as in chemical plants, the oil industry, in gas works, in wood and plastic processing industry or in agriculture.