203 SERIES

The 203 SERIES is a kind of FILAMENT REPLACEMENT LEDs - T1¼ . Some design considerations are as follows. First, 203 SERIES features water clear high intensity LEDs as standard. The single chip LED devices have been modified by the removal of the domed portion of the encapsulation (flat-topped) to provide even illumination of switches and annunciators. Second, filament Replacement LEDs have been specifically designed to meet the primary objective of providing improved reliability.As 203 SERIES is suitable for both new-build and retro-fit, (sometimes in very old systems), a wide range of illuminated push button switches and lamp holders can be encountered. Third, build up of electro-static discharge occurs in many situations involving people moving and handling products. The range of possible situations is very diverse but voltage levels as high as several thousand volts can and do arise in many individual situations. Fourth, the forward voltage/current value of an LED is dependant upon the ambient temperature of the environment in which it is operated.
Next is some technical information about the 203 series. Its Lamp Base Style is Sub-Miniature Bi-Pin T1¼ ,and its Metric Equivalent is 4 mm.The Maximum Power Dissipation is 500(mW).
Here are some features of 203 SERIES . The first one is Direct replacement for T1¼ Bi-Pin, the second one is Flat-topped for enhanced, even illumination of large lens areas, the third one is Improves equipment reliability, the last one is Fit & Forget. reliability.
Some notes of 203 SERIES are as follows:First, Intensities (lv) and colour shades of white (x,y co-ordinates) may vary between LEDs within a batch. Second,Products must be derated according to the derating information. Each derating graph refers to specific LEDs. Appropriate LED numbers shown.