Ex safety switch with separate actuator

Ex ES 98 ST-3G/D

  • Ex zone 2 and 22

  • Metal enclosure

  • Design to EN 50041

  • Wiring compartment

  • Actuator head can be repositioned in factory by 4 x 90°

  • The actuator is not included in the delivery of the switches

Technical data

Applied standards

EN 60947-5-1, EN IEC 60079-0, EN 60079-1, EN IEC 60079-7, EN 60079-31, EN ISO 13849-1, EN ISO 14119


aluminium die-cast, corrosion-resistant, powder-coated, anthracite grey, similar to RAL 7016


aluminium die-cast, powder-coated, signal yellow, similar to RAL 1003


stainless steel 1.4301



Switch type

type 2

Coding level

low coding

Degree of protection

IP67 (IEC/EN 60529)

B10d (10 % load)

2 million


max. 20 years

Contact material


Switching system

slow action, positive break NC contacts A

Switching elements

1 NC/1 NO contact or 2 NC contacts, type Zb


screw connection terminals

Cable cross-section

min. 0.5 mm² (AWG 20), max. 1.5 mm² (AWG 16), incl. conductor ferrules

Cable entry

1 x M20 x 1.5 (incl. 1 cable gland)

Clamping range

7 … 13 mm

Rated impulse withstand voltage Uimp

4 kV

Rated insulation voltage Ui

250 V

Conventional thermal current Ithe

6 A

Rated operating current/voltage Ie/Ue

6 A/250 VAC; 0.25 A/230 VDC

Utilisation category

AC-15; DC-13

Short-circuit protection

6 A gG/gN fuse

Ambient temperature

T6: –20 °C … +40 °C;
T5: –20 °C … +60 °C

Mechanical life

> 1 million operations

Operation cycles

max. 1800/h

Repeat accuracy of switching points

± 0.1 mm

Impact energy

max. 7 J

Ex marking

L II 3G Ex dc ec IIC T6/T5 Gc,
L II 3D Ex tc IIIC T80 °C/T95 °C Dc


Mounting and wiring instructions – Ex ES 98 ST-3G/D

German, English, French, Italian, Portuguese, Russian

PDF 3 MB 18.09.2023
Please go to the relevant product pages for additional downloads.

Variants / Options

The following variants / options are available on request:

  • Actuator head can be repositioned in factory by 4 x 90°
to your contact persons

Other interesting products

Ex ES 98 ST

2G/D version for Ex zone 1 and 21