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FB4 explosionproof filament steady light for hazardous areas

These certified steady beacons have been designed for use in flammable atmospheres and harsh environmental conditions.

The marine grade alloy or stainless steel enclosures are suitable for use offshore or onshore, where light weight combined with corrosion resistance and strength is required.

Units can be painted to customer specification and fitted with identification labels.

Available with optional Exe terminal chamber.

Data Sheets
FB4 North American (391 KB) (PDF)
FB4 (555 KB) (PDF)
Product Certificates
ATEX Exd(e) IIC (614 KB) (PDF)
UL (401 KB) (PDF)
TR CU Ex d IIC (2 MB) (PDF)
Product Certificates – External Link
IECEx Exd(e) IIC
Schematics / Wiring
Exd(e) Schematic (71 KB) (PDF)
FB4 UL Schematic (99 KB) (PDF)
FB4 ULC Schematic (150 KB) (PDF)
Technical Manuals
Exd(e) (TM221) (368 KB) (PDF)
UL (TM121) (232 KB) (PDF)
Certification ATEX, IECEx, UL, TR CU
Explosion Protection ATEX Ex II 2GD, Exd(e) IIC T5/T6
Area Classification Zone 1 and Zone 2 use.
Certified Ambient Temperature -55°C to +70°C (FB4 Exd)*
-50°C to +55°C (FB4 Exde)*
-20°C to +70°C (FL4)*
Ingress Protection IP66 & IP67
Material Stainless Steel or Alloy
Entries Up to 4 x 20mm or 25mm*
Weight Alloy: 6.5 - 8.9kg
Stainless Steel: 14.9-17.3kg
Options Body & lens colour, lens guard, tag & duty labels,
lamp wattage, relay initiate or terminal chamber,
voltages 24V - 110V d.c. 110V -254V a.c.

 * Model dependent


  • Zone 1 and Zone 2 use.
  • UL listed for USA and Canada
    • Hazardous locations:
    • Class I, Div. 1, Groups C & D.
    • Class I, Zone 1, AExd IIB T4/T5.
    • Ordinary locations: Visual-Signal Device.
  • Exde IICT3/T6.
  • ATEX approved Ex II 2GD.
  • BASEEFA certified.
  • TR CU certified.
  • Certified temperature: –55°C to +70°C.
  • IP66 and IP67.
  • Filament Lamps supplied.
  • Corrosion Resistant.
  • Exde version has gland earth continuity in the GRP terminal chamber.
  • Optional lens guard.
  • Tapered spigot flamepath.
  • Retained cover screws.