Ex 355 AZ


  • Ex zone 1 and 21
  • Metal enclosure
  • Mounting details to EN 50041
  • Wiring compartment
  • Actuator can be repositioned in factory by 4 x 90°
  • Special version only for dust Ex zone 22 available
  • The actuator is not included in the delivery of the switches

Technical data

StandardsEN 60947-5-1; EN 60079-0,
EN 60079-1, EN 60079-7,
EN 60079-31; EN ISO 13849-1;
EN ISO 14119
Enclosurezinc die-cast, enamel finish
Switch typetype 2
Coding levellow coding
Actuatorstainless steel 1.4301
Switch insertEx 95
Degree of protectionIP 67 to IEC/EN 60529
Contact materialsilver
Switching systemslow action, positive break NC contacts
Switching elements1 NC/1 NO contact or 2 NC contacts, 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
Positive break travel8.3 mm
Ambient temperatureT6: –20 °C … +40 °C;
T5: –20 °C … +60 °C
Mechanical life> 1 million operations
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

Slow action

1 NC/1 NO contact

Type   Material no.
Ex 355 AZ 1Ö/1S 1179075

Slow action

2 NC contacts

Type   Material no.
Ex 355 AZ 2Ö 1180261

Angled actuators

Type   Material no.
Angled actuator AZ 335/355-B5 1170538
Angled actuator AZ 335/355-B5-Flex 1182126

Flexible actuators

Type   Material no.
Flexible actuator AZ 335/355-B6 1170540
Type   Material no.
Lockout tag SZ 16/335 1170535
Type   Material no.
Slot sealing plug AZ 335/355-1990 1172965