122 Series

BS EN ISO 9001:2000

Approved Manufacturer

SAMPLES AVAILABLE

© MARL INTERNATIONAL LTD 2007 : DS 049/07 Issue 3

Page 2 of 3

How to Order:

website: www.marl.co.uk • email: sales@marl.co.uk •

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. Marl International reserve the right to alter without notice the specification or any conditions of supply

for products or service.

Housing Material

Polycarbonate

This material offers UL94 V-0 flame retardancy* and a high impact strength. This material has a melt point of 290-340°C and is suitable for use in

the majority of automatic soldering processes.

*Material test thickness 1.6mm

LEDs

LED Polarity

Anode identification is shown in the dimensional diagram. The long lead of a non-cropped unit can also be used to help identify the anode. For

the 2 pin Bi-colour units the standard colour configuration is red anode to the ‘+’ sign.

Reverse Polarity

This is offered on all PCB units, with the exception of the 125 series, if requested to help overcome the problem of systems with reverse polarity

connections. Multiple units can also be supplied in reverse polarity but not with mixed polarities. The 2 pin and 3 pin Bi-colours can be supplied in

reverse colour configuration.

Bi-colour

2 Pin Operation

To acheive the second colour for a 2 pin Bi-colour unit the supply must be reversed, standard colour configuration for these units is red anode to

the ‘+’ sign.

Electro-static Discharge (ESD)

Build up of electrostatic 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 intensityproducts 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.

Note:

All luminous intensity figures refer to the unmodified discrete LED.

Dimensions in mm (Typical)

Not to scale

Mounting Footprint