Ex STM 295

  • Ex zone 1 and 21
  • Thermoplastic enclosure
  • Wiring compartment
  • Spring-to-lock or power-to-lock principle
  • Two Ex switch inserts in one enclosure
  • Double insulated
  • Locking force 1000 N
  • Actuator can be repositioned by 90° on request
  • Special version only for gas Ex zone 2 and dust Ex zone 22 available
  • Attention: Please state required international approvals with your order!
Note
  • The actuator is not included in the delivery of the switches

Technical data

Applied standards EN 60947-5-1, EN ISO 14119, EN 60079-0, EN 60079-1, EN 60079-7, EN 60079-18, EN 60079-31, EN ISO 13849-1
Enclosure thermoplastic, glass-fibre reinforced, impact resistant, self-extinguishing UL 94 V-0
Actuator stainless steel 1.4301
Switch type type 2
Coding level low coding
Tightening torque cover screws: 0.5 … 0.6 Nm
switch inserts M3 screw connection terminals: min. 0.6 Nm
solenoid M3.5 screw connection terminals: min. 0.8 Nm
Degree of protection IP 64 to IEC/EN 60529
B10d (10 % load) 1 million
TM max. 20 years
Contact material silver
Switching system slow action, positive break NC contacts
Switching elements 2 NC/2 NO, 3 NC/1 NO or 4 NC/2 NO contact, type Zb
Connection screw connection terminals
Cable cross-section min. 0.2 mm² / AWG 24, max. 1.5 mm² / AWG 16
Cable entry 2 x M20 x 1.5 (incl. 1 cable gland)
Clamping range 7 … 12 mm
Rated operating isolation voltage Ui 250 V
Rated impulse withstand voltage Uimp 4 kV
Utilisation category AC-15; DC-13
Rated operating current/voltage Ie/Ue enabling/signalling contacts:
3 A/250 VAC; 0.25 A/230 VDC or 1.5 A/250 VAC; 0,25 A/230 VDC;
direct-current solenoid:
0.08 A / 24 VDC +10 %/–15 % 
Short-circuit protection 3 A / 1.5 A gG/gN fuse;
direct-current solenoid: 2 A (slow blow)
Power consumption >2.5 VA (continuous operation)
max. 47 VA (for 250 ms)
Operation cycles max. 1200/h
Mechanical life > 500 000 operations
Locking force Fmax 1000 N
Impact energy max. 7 J
Ambient temperature –20 °C … +55 °C
Ex marking II 2G Ex db eb mb IIC T4 Gb,
II 2D Ex tb IIIC T100 °C Db
IECEx Ex db eb mb IIC T4 Gb,
Ex tb IIIC T100 °C Db
Approvals BVS 10 ATEX E 053 X
IECEx BVS 11.0030X
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* depending on the variant (see » Certificates)

Ordering details

Spring-to-lock principle

Type   Material no.  
Type    Material no.   
Ex STM 295 1Ö1S/1Ö1S-R stock type Standard versions, in stock or available at short notice 1186429
Type    Material no.   
Ex STM 295 1Ö1S/1Ö1S-R/90° stock type Standard versions, in stock or available at short notice 1188541
Type    Material no.   
Ex STM 295 2Ö/1Ö1S-R 1445357
If you cannot find the version you require, just ask us! Our product portfolio to date has included many customised switchgear variants.

Spring-to-lock principle, with manual release FE

Type   Material no.  
Type    Material no.   
Ex STM 295 1Ö1S/1Ö1S-R-FE stock type Standard versions, in stock or available at short notice 1186394
Type    Material no.   
Ex STM 295 1Ö1S/1Ö1S-R/90°-FE stock type Standard versions, in stock or available at short notice 1188545
Type    Material no.   
Ex STM 295 1Ö1S/2Ö-R-FE 1333024
Type    Material no.   
Ex STM 295 2Ö/1Ö1S-R-FE stock type Standard versions, in stock or available at short notice 1187282
Type    Material no.   
Ex STM 295 2Ö/1Ö1S-R/90°-FE 1188546
Type    Material no.   
Ex STM 295 2Ö1S/2Ö1S-R-FE 1249920
Type    Material no.   
Ex STM 295 1NC1NO/1NC1NO-R-FE JPEx 1319584
If you cannot find the version you require, just ask us! Our product portfolio to date has included many customised switchgear variants.

Power-to-lock principle

Type   Material no.  
Type    Material no.   
Ex STM 295 1Ö1S/1Ö1S-A stock type Standard versions, in stock or available at short notice 1184799
Type    Material no.   
Ex STM 295 1Ö1S/1Ö1S-A/90° 1188542
Type    Material no.   
Ex STM 295 2Ö/1Ö1S-A 1188560
Type    Material no.   
Ex STM 295 2Ö1S/2Ö1S-A 1443318
If you cannot find the version you require, just ask us! Our product portfolio to date has included many customised switchgear variants.

Actuators

Type   Material no.  
Type    Material no.   
Straight actuator STM 295-B1 stock type Standard versions, in stock or available at short notice 1183481
Type   Material no.  
Type    Material no.   
Angled actuator STM 295-B5 stock type Standard versions, in stock or available at short notice 1183470
Type   Material no.  
Type    Material no.   
Flexible actuator STM 295-B6 stock type Standard versions, in stock or available at short notice 1435030