FEATURES FILAMENT REPLACEMENT LEDs - T2 Bayonet Cap 253 SERIES l Direct replacement for T2 BA7s PACK QUANTITY = 300 PIECES l Network Rail Certificate of Acceptance ref: PA05/01022 l Reduces stock and maintenance costs l Resistant to shock and vibration l 50° Viewing Angle SPECIFICATIONS Ordering Information & Typical Technical Characteristics (Ta = 25°C) Mean Time Between Failure = 100,000 Hours. HENRY WILLIAMS PART NO. MARL COLOUR PART LENS VOLTAGE DC NUMBER Vopr CURRENT DC lopr LUMINOUS INTENSITY** WAVE OPERATING STORAGE LENGTH TEMP TEMP λp Topr Tstg HIGH INTENSITY HW05 253-997-98-50 White Water Clear 24 5 100 * -40 ~ +95 -40 ~ +100 Yes HW10 253-997-98-51 White Water Clear 24 10 180 * -40 ~ +95 -40 ~ +100 Yes HW10Blue 253-930-98-51 Blue Water Clear 24 10 140 470 -40 ~ +95 -40 ~ +100 Yes Vac/dc mA mcd nm 0 UNITS C C 0 Product Configuration PART NUMBER DESCRIPTION PADS NUMBER HW05 5mA lamp replacement LED with BLACK body 086/023012 HW10 10mA lamp replacement LED with GREY body 086/023013 HW10Blue 10mA lamp replacement LED with GREY body None applied yet. * = Typical emission colour: x=0.45 y=0.41. Colour temperature 2500K-3175K. Intensities (lv) and colour shades of white (x,y co-ordinates) may vary between LEDs within a batch. ** = Luminous intensity measured @ 24Vdc. Please note - This product will not illuminate below 9Vac/dc. The current will stabilise above 17Vac/dc and remain constant up to 28Vac/dc. Absolute maximum input voltage is 28Vac/dc • Internal Full Wave recification giving; - Unperceivable flicker on AC supplies with operating frequencies of 30Hz and above. - Minimal Harmonic Disturbance. • Designed to withstand Spikes and Transients with energy levels below 300mj. •Product marking indicates current rating on sleeve. •Optional Burn In available. •HW05 is identifed by a black sleeve with HW05 print, operating at 5mA nominal and 100mcd. •HW10 is identifed by a grey sleeve with Hw10 print, operating at 10mA nominal and 180mcd. •HW10 is identified by a grey sleeve with HW10Blue print, operating at 10mA nominal and 140mcd. How to Order: website: www.marl.co.uk • email: [email protected] • webstore: www.leds.co.uk • Telephone +44 (0)1229 582430 • Fax: +44 (0)1229 585155 The information contained in this datasheet does not constitute part of any order or contract and should not be regarded as a representation relating to either products or service. for products or service. Marl International reserve the right to alter without notice the specification or any conditions of supply © MARL INTERNATIONAL LTD 2006 : DS 082/06 Issue 2 SAMPLES AVAILABLE Page 1 of 2 253 Series Colour dot on product denotes LED colour Dimensions in mm (Typical) Not to scale TECHNICAL INFORMATION Lamp Base Style Series Bayonet Cap T2 BA7s 253 Metric Equivalent (mm) 7 Maximum Power Dissipation (mW) 625 DESIGN CONSIDERATIONS Single-Chip LEDs All devices feature 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. Non flat topped versions are also available, please contact the sales department for details. Product Evaluation Filament Replacement LEDs have been specifically designed to meet the primary objective of providing improved reliability. As this product range 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. Due to subjectivity, evaluation of the LED type is recommended, (samples of all standard models are available). Care should be taken to correctly simulate operating ambient light conditions to ensure that the correct device has been selected to maximise viewing characteristics such as viewing angle, colour compatibility and on/off contrast ratio. Electro-static Discharge (ESD) 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. When an operator charged up to these levels handles a ‘static sensitive device’, there is a very probable likelihood that the device will be irreversibly damaged. It is essential that precautions are taken at all stages during manufacture and assembly of these products. Although LEDs were never considered to be static sensitive devices, changes in manufacturing technology and materials used to produce higher intensity products over a large range of the wavelength spectrum have changed this. Marl has an approved system of ESD control from goods in, through production and into final packing and despatch. We recommend all users of LED based products follow the guidelines of BS 100015. Marl accept no liability for any product that is operated higher than the stated voltage. Note: All luminous intensity figures refer to the unmodified discrete LED. How to Order: website: www.marl.co.uk • email: [email protected] • webstore: www.leds.co.uk • Telephone +44 (0)1229 582430 • Fax: +44 (0)1229 585155 The information contained in this datasheet does not constitute part of any order or contract and should not be regarded as a representation relating to either products or service. for products or service. Marl International reserve the right to alter without notice the specification or any conditions of supply © MARL INTERNATIONAL LTD 2006 : DS 082/06 Issue2 SAMPLES AVAILABLE BS EN ISO 9001:2000 Approved Manufacturer Page 2 of 2