261 MARL | Alldatasheet

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Technical content

features

Ordering information and typical characteristics (Ta = 25°C) BS EN ISO 9001:2008 approved manufacturer 261 series

  • Direct replacement for T3 ¼ Midget Edison Screw E10
  • Ideal for industrial pushbutton switches and annunciator panels
  • Fully encapsulated for unrivalled vibration and shock resistance
  • Bi-polar and bridge rectified
  • Pack Quantity = 20 Pieces Part Number Colour Voltage Vac/dc Current DC (mA) Luminous Intensity (mcd) Wave Length (nm) Operating Temp. (°C) Storage Temp. (°C) De-rating Graphs 261-990-95-38 White 60 Vdc 10 770 * See below -30 - +85 -40 - +100 F 261-993-95-38 Warm White 60 Vdc 10 Call * See below -30 - +85 -40 - +100 I 261-990-95 White 60 Vdc 10 22000 * See below -30 - +85 -40 - +100 F 261-993-95 Warm White 60 Vdc 10 21000 * See below -30 - +85 -40 - +100 I * = Voltage for 20mA product is Vf at 20mA, not Vopr - Products must be de-rated according to the de-rating information. Each de-rating graph refers to specific LEDs. Please refer to graphs on page 2. - Luminous intensity is measured at 20mA on a discrete LED unless otherwise stated. to order please contact us on: t: +44 (0)1229 582 430 © marl international limited technical documentation has been designed by marl international limited for the intention of providing information, which must not be copied or released to a third party without prior written consent from marl international limited. the information provided does not constitute part of any order or contract and should not be regarded as a representation relating to either products or service. no responsibility can be assumed for inaccuracies or printing errors. marl international limited reserve the right to alter without notice the specification or any conditions of supply for product or service. marl international limited - dsn 261 - version 2012-12-06-113635 page 1 of 3

Dimensions in mm (typical) Not to scale Lamp Base Style SeriesMetric Equivalent (mm) Max. Power Dissipation (mW) Intensities (Iv) and colour shades of white (x,y co-ordinates) may vary between leds within a batch BS EN ISO 9001:2008 approved manufacturer 261 series 4.9 28.40 25.90 Colour dot on product denotes LED colour. T3 ¼ Midget Edison Screw E10 261 10 625 990F *Typical emission colour White x 0.296 0.287 0.330 0.330 y 0.276 0.295 0.339 0.318 899F *Typical emission colour Warm White x 0.4255 0.4390 0.4680 0.4519 y 0.4000 0.4310 0.4385 0.4086 Ambient Temperature Ta (°C) Forward Current IF (mA) Derating Graph F 2030 Ambient Temperature Ta (°C) Forward Current IF (mA) Derating Graph I 2030 8.5 to order please contact us on: t: +44 (0)1229 582 430 f: +44 (0)1229 585 155 © marl international limited technical documentation has been designed by marl international limited for the intention of providing information, which must not be copied or released to a third party without prior written consent from marl international limited. the information provided does not constitute part of any order or contract and should not be regarded as a representation relating to either products or service. no responsibility can be assumed for inaccuracies or printing errors. marl international limited reserve the right to alter without notice the specification or any conditions of supply for product or service. marl international limited - dsn 261 - version 2012-12-06-113635 page 2 of 3

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. 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. Marl recommend all users of LED based products follow the guidelines of BS 100015. Power De-Rating The forward voltage/ current value of an LED is dependant upon the ambient temperature of the environment in which it is operated. Therefore, care must be taken to operate the LED at the correct voltage/ current values, depending upon the ambient temperature. Consequently, a recommendation regarding operating voltages and currents is given in order to address these temperature effects. This recommendation is termed ‘de-rating’. It is usual for forward voltages and currents to be specified for ambient temperature of 25°C. However, because the values of these qualities vary with temperature, marl should be contacted if the device is to be operated at a temperature significantly higher than 25°C. Marl accept no liability for any product that is operated higher than the stated voltage. to order design considerations All devices feature water clear high intensity LEDs as standard. In devices where discrete LEDs are used, the single Flat-topping does not apply to devices using surface-mounted device (SMD) LEDs. BS EN ISO 9001:2008 approved manufacturer 261 series to order please contact us on: t: +44 (0)1229 582 430 f: +44 (0)1229 585 155 © marl international limited technical documentation has been designed by marl international limited for the intention of providing information, which must not be copied or released to a third party without prior written consent from marl international limited. the information provided does not constitute part of any order or contract and should not be regarded as a representation relating to either products or service. no responsibility can be assumed for inaccuracies or printing errors. marl international limited reserve the right to alter without notice the specification or any conditions of supply for product or service. marl international limited - dsn 261 - version 2012-12-06-113635 page 3 of 3