Ex ZS 73 S

Features/Options

  • Ex zone 1 and 21
  • Metal enclosure
  • 2 contacts
  • Wire length up to 2 x 100 m
  • Release by push-button (VD)
  • Available without unlocking mechanism (per EN 60947-5-1)
  • Wire pull and breakage detection
  • Special version only for dust Ex zone 22 available
  • N.B.: Please state required approvals for Russia, China, Brazil and North America with your order!

Technical data

StandardsEN 60947-5-1, -5; EN 60079-0,
EN 60079-1, EN 60079-31;
EN ISO 13850; EN ISO 13849-1
Enclosurealuminium die-cast, enamel finish
Coverglass-fibre reinforced, shock-proof thermoplastic (PA 66), self-extinguishing UL 94-V0
Switch insertEx 14
Degree of protectionIP 65 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
Connectionpre-wired cable H05VV-F
Cable cross-section4 x 0.75 mm² (incl. conductor ferrules)
Cable length3 m
B10d (10 % Load)Ex ZS 73 S: 2 million
Ex ZS 73 S VD: 200 000
TMmax. 20 years
Uimp4 kV
Ui250 V
ItheT6: 6 A, T5: 3 A
Utilisation categoryAC-15; DC-13
Ie/Ue6 A/250 VAC; 0.25 A/230 VDC
Max. fuse rating6 A gG/gN fuse
Ambient temperatureT6: –20 °C … +65 °C,
T5: –20 °C … +75 °C, +90 °C with max. 3 A
Mechanical lifeEx ZS 73 S: > 1 million operations
Ex ZS 73 S VD: > 100 000 operations
Max. wire length2 x 100 m
Featureswire pull and breakage detection
Impact energymax. 7 J
Ex marking II 2G Ex d IIC T6/T5 Gb,
II 2D Ex tb IIIC
T80 °C/T95 °C Db
IECEx Ex d IIC T6/T5 Gb,
Ex tb IIIC T80 °C/T95 °C Db
ApprovalsPTB 11 ATEX 1003 X
IECEx PTB 07.0034 X
Ordering details
Type code

Slow action

1 NC/1 NO contact

Type   Material no.
Ex ZS 73 S 1Ö/1S VD - 3m 1178045

Slow action

2 NC contacts

Type   Material no.
Ex ZS 73 S 2Ö VD - 3m 1180510