Ex 355

Features/Options

  • Ex zone 1 and 21
  • Metal enclosure
  • Mounting and switching details to EN 50041
  • Wiring compartment
  • 3 cable entries
  • Actuator can be repositioned by 4 x 90°
  • Rocking lever can be repositioned by 10° steps
  • With gold-plated contacts available on request
  • Special version only for dust Ex zone 22 available
  • N.B.: Please state required international approvals with your order!

Technical data

StandardsEN 60947-5-1; EN 60079-0,
EN 60079-1, EN 60079-7,
EN 60079-14, EN 60079-31;
EN ISO 13849-1; EN ISO 14119
Enclosurezinc die-cast, enamel finish
Switch typetype 1
Coding levelno coding
Switch insertEx 95
Degree of protectionIP 67 to IEC/EN 60529
Contact materialsilver
Switching systemslow action, positive break NC contacts ; positive break depends on the actuator used
Switching elements1 NC/1 NO, 2 NC or 1 NC/1 NO contact with contact overlapping, type Zb
Connectionscrew connection terminals
Cable cross-sectionmax. 1.5 mm² (incl. conductor ferrules)
Cable entry3 x M20 x 1.5 for
cable section 5 … 9 mm
B10d (10 % Load)2 million
TMmax. 20 years
Uimp4 kV
Ui250 V
Ithe6 A
Ie/Ue6 A/250 VAC; 0.25 A/230 VDC
Utilisation categoryAC-15; DC-13
Max. fuse rating6 A gG/gN fuse
Ambient temperature–20 °C … +60 °C
Mechanical life> 1 million operations
Operation cycles1800/h
Repeat accuracy of switching points± 0.1 mm
Contact openingmax. 2 x 3.5 mm
Impact energymax. 7 J
Ex marking II 2G Ex db e IIC T6/T5 Gb,
II 2D Ex tb IIIC
T80 °C/T95 °C Db
IECEx Ex db e IIC T6/T5 Gb,
Ex tb IIIC T80 °C/T95 °C Db
ApprovalsBVS 04 ATEX E 126
IECEx BVS 07.0013
Ordering details
Type code

Plunger S


* with safety function

Type   Material no.
Ex 355 S 1Ö/1S  * 1178426
Ex 355 S 2Ö  * 1179217
Ex 355 S 1S/1Ö UE  * on request Produced to order.

Roller plunger R


* with safety function

Type   Material no.
Ex 355 R 1Ö/1S  * 1179159
Ex 355 R 2Ö  * 1179218
Ex 355 R 1S/1Ö UE  * 1280836

Roller lever 1K


* with safety function

Type   Material no.
Ex 355 1K 1Ö/1S  * 1178444
Ex 355 1K 2Ö  * 1178641
Ex 355 1K 1S/1Ö UE  * 1188259

Angled roller lever 3K


* with safety function

Type   Material no.
Ex 355 3K 1Ö/1S  * 1187048
Ex 355 3K 2Ö  * 1189337
Ex 355 3K 1S/1Ö UE  * 1189521

Rocking lever 4VH


* with safety function

Type   Material no.
Ex 355 4VH 1Ö/1S  * 1179156
Ex 355 4VH 2Ö  * 1189527
Ex 355 4VH 1S/1Ö UE  * 1477218

Long rocking lever 4V3H


* with safety function

Type   Material no.
Ex 355 4V3H 1Ö/1S  * 1179072
Ex 355 4V3H 2Ö  * 1179966
Ex 355 4V3H 1S/1Ö UE  * 1317261

Adjustable rocking lever 4V7H-2138


* with safety function

Type   Material no.
Ex 355 4V7H 1Ö/1S-2138  * 1330278
Ex 355 4V7H 2Ö-2138  * on request Produced to order.
Ex 355 4V7H 1S/1Ö UE-2138  * 1185952

Adjustable rocking lever 4V7H

Type   Material no.
Ex 355 4V7H 1Ö/1S 1178443
Ex 355 4V7H 2Ö 1222698
Ex 355 4V7H 1S/1Ö UE on request Produced to order.

Forked lever latching 3V4D

Type   Material no.
Ex 355 3V4D 1Ö/1S 1181679
Ex 355 3V4D 2Ö 1189522
Ex 355 3V4D 1S/1Ö UE 1189523

Rod lever 4V10H

Type   Material no.
Ex 355 4V10H 1Ö/1S 1178428
Ex 355 4V10H 2Ö 1189998
Ex 355 4V10H 1S/1Ö UE on request Produced to order.

Spring rod with plastic tip TK

Type   Material no.
Ex 355 TK 1Ö/1S 1178557
Ex 355 TK 2Ö on request Produced to order.