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Square Ex d Enclosure - Aluminium

Ex d and Ex tb Protection
Zones 1&2, 21&22


A threaded lid, square Ex d rated enclosure, constructed from aluminium alloy and designed for use in hazardous areas with the most demanding conditions.

These enclosures are designed to house terminals, control and signalling equipment and instruments in areas classified hazardous by the presence of flammable liquids, gases and vapours or combustible dusts.

Suitable for application across many industries where reliability and safety are of the highest priority such as: offshore, mining and metal refining, marine, oil & gas, petrochemical and manufacturing.


  • IP66 and IP67 protection rating - more info on IP ratings
  • Customised etched identification label
  • Internal mounting pan included
  • Solid silicone seal
  • Machine threaded entries
  • Certified for use in IIC hydrogen and conductive dust applications
  • Optional glass viewing window on cover
  • Optional switches and circuit breakers with external padlockable operating handle

Technical Information

  • Certification number: IECEx TSA 08.0040
  • Protection: Ex d IIC T6 -20ºC<Ta<60ºC Gb
    Ex tb IIIC T85ºC -20ºC<Ta<60ºC Db
  • Ambient Temperature: -20ºC ~ +60ºC
  • Conformity: IEC 60079-0, IEC60079-7, IEC 60079-31
  • Range: RJB and SJB Series

Selection Chart

Catalogue No. Height (mm) Width (mm) Depth (mm)
STBA1310 180 180 140
STBA1308W 180 180 140
STBA1711 230 230 160
STBA1709W 230 230 160


  • Internal mounting pan
  • Earth stud


  • Marine grade, copper free aluminium alloy
  • Silicone gasket
  • Fixings - 316 stainless steel

Terminals & Controls

The STBA square ex d enclosure can be customised to suit your requirements by the fitting of control gear/operators, entries and terminals. Examples of control/operators available:

    • Pushbuttons
    • Emergency stop operator
    • Isolator switches
    • Key switches
    • Pilot lights
    • Terminals
    • Ammeters
    • Voltmeters
    • Circuit breakers



Exd enclosure, square with threaded lid