Ex 355 4VSR

Features/Options

  • Ex zone 1 and 21
  • Metal enclosure
  • 2 contacts
  • Mounting details to EN 50041
  • Wiring compartment
  • Adjustable-length rod lever with nylon roller
  • For light- and medium-heavy applications
  • Special version only for dust Ex zone 22 available

Technical data

StandardsEN 60947-5-1; EN 60079-0,
EN 60079-1, EN 60079-7,
EN 60079-31; EN ISO 13849-1
Enclosurezinc die-cast, enamel finish
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 diameter 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

Slow action

1 NC/1 NO contact

Type   Material no.
Ex 355 4VSR 1Ö/1S 1048057
If you cannot find the version you require, just ask us! Our product portfolio to date has included many customised switchgear variants.

Slow action

2 NC contacts

Type   Material no.
Ex 355 4VSR 2Ö 1180267
If you cannot find the version you require, just ask us! Our product portfolio to date has included many customised switchgear variants.

Slow action

1 NC/1 NO contact with overlapping

Type   Material no.
Ex 355 4VSR UE on request Produced to order.
If you cannot find the version you require, just ask us! Our product portfolio to date has included many customised switchgear variants.