Low-voltage lamps for traffic signalling equipment.
Nominal voltage 38…42 V Test voltage 40 V Nominal luminous flux 500 lm Diameter 36 mm Overall length 67 mm Light center length (LCL) 31 mm Base (standard designation) BA20d Burning position s135
Benefits • Simple changeover to the secondary filament possible when main filament fails • Max. premature failure rate: 2% up to 3000 h (related to lamp failures only)
Areas of application • Road traffic signalling systems
Features • Dual-coil lamps for higher operation safety of the signalling system • Long average lamp life time: 8000 h (for main filament only) • Maintenance intervals up to four months possible (depending on installation)
SAFETY ADVICE Use only in equipment/luminaires that are specially designed for the purpose. Protect the lamps against moisture during operation and installation. Legal advice Correspond to DIN 49842 part 1 and 3