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208SERIES BULBREPLACEMENTLED

208SERIES  BULBREPLACEMENTLED

208SERIES BULBREPLACEMENTLED

Product catalog summary
Features and Benefits
  • The 208 Series LED bulbs feature a T6.8 slide base and flat-topped LEDs, offering a range of color and voltage options. They are designed for direct replacement of standard bulbs, providing even illumination without the need for color filters. The LEDs are manufactured with an internal resistor for outstanding reliability, and a warm white version is available for use behind colored lenses.
Technical Specifications
  • The LEDs operate at typical voltages of 5-6V, 12V, 24-28V, and 48V, with a typical current of 15-20mA. They offer a wide operating temperature range from -30°C to +75°C and storage temperatures from -40°C to +100°C. The luminous intensity and wavelength vary by color, with specific values provided for red, yellow, green, blue, warm white, and cool white LEDs.
Design Considerations
  • The LEDs are designed for improved reliability and are suitable for both new installations and retrofits. Evaluation of LED types is recommended to ensure compatibility with existing systems. Electro-static discharge precautions are essential during manufacturing and assembly to prevent damage to the LEDs.
Voltage, Current, and Temperature
  • The forward voltage/current of an LED depends on the ambient temperature. It is crucial to operate LEDs within specified voltage and temperature ranges to avoid damage. MARL provides guidelines for operating conditions and accepts no liability for products used outside these parameters.
Technical Drawing and De-rating Graphs
  • The document includes technical drawings and de-rating graphs illustrating the relationship between ambient temperature and forward current for different LED colors. These graphs help in understanding the performance characteristics of the LEDs under varying conditions.
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Catalog excerpts

208SERIES  BULBREPLACEMENTLED-1

Range of LED colour options Range of voltage options Warm White version available Direct replacement for standard bulb fitting Flat topping gives even illumination of large lens areas No colour filter required Manufactured with internal resistor Outstanding reliability Warm White LED may be used behind coloured lens as a true replacement for a filament lamp Typical Emission Colours Warm White LED Typical Emission Colours Cool White LED To order please contact us on +44 (0) 1229 582 430 Intensities (lv) and colour shades of white (X-Y co-ordinates) may vary between LEDs within a batch. Additional LED Colours, Voltage Options and Reverse Polarity options available for semi-custom projects. Please contact our Sales Team. All LED components are supplied in anti-static packaging. Characteristics at Ta = 25°C. For operating temperature derating graphs, please refer to sheet 2.

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208SERIES  BULBREPLACEMENTLED-2

208 SERIES BULB REPLACEMENT LED TECHNICAL DATA Series Lamp Base Style TECHNICAL DRAWING Weight (g): 4.3 Dimensions in mm (typical). Not to scale. + printed on base denotes Anode. Colour dot on product denotes LED colour DE-RATING GRAPHS Red / Green / Blue / Cool White LED 40 30 20 DESIGN CONSIDERATIONS Single-Chip LEDs All devices feature water clear high intensity LEDs as standard. In devices where discrete LEDs are used, 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....

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