122 series
features
• PCB Mounting Ø 3mm LED
• Material conforms to UL94 V-O flammability ratings
• Colour diffused lens, white diffused for bi-colour options
• Reverse polarity options available
• Custom built multi-colour permutations available
• Typically available ex stock
• Pack Quantity = 150 Pieces
specifications
Ordering information and typical characteristics (Ta = 25°C)
Part
Number
122-305-04
122-311-04
122-314-04
122-330-04
Colour
Red
Yellow
Green
Red/Green
Voltage
Vac/dc
2.0* Vdc
2.1* Vdc
2.2* Vdc
2 - 2.2* Vdc
Current
DC
(mA)
20
20
20
20
Luminous
Intensity
(mcd)
20
30
28
20/20
Wave
Length
(nm)
627
590
565
627/565
Operating
Temp.
(°C)
-40 - +85
-40 - +85
-40 - +85
-40 - +85
Storage
Temp.
(°C)
-40 - +85
-40 - +85
-40 - +85
-40 - +85
De-rating
Graphs
A
A2
F
E
* = 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 3.
- Luminous intensity is measured at 20mA on a discrete LED unless otherwise stated.
to order
to order please contact us on: t:
+44 (0)1229 582 430
f:
+44 (0)1229 585 155
e:
sales@marl.co.uk
w:
www.leds.co.uk
© 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.
BS EN ISO 9001:2008
approved manufacturer
marl international limited - dsn 122 - version 2013-02-12-114852
page 1 of 5
pcb led indicators
122 series
technical data
Dimensions in mm (typical)
Not to scale
5.2
3.7
10
2.54
4 HOLES
0.9 ±0.1
10.2
5.2
2.5
0.5 Sq
Anode
2.54
4
6.84
2.54
housing material
Polycarbonate
This material offers UL94 V-O flame retardancy* and a high impact strength. This material has a melting point of 290-340°c
and is suitable for use in the majority of automatic soldering processes
*Material test thickness of 1.6mm
de-rating information
Derating Graph A
55
50
45
40
35
55
50
45
40
35
2.54
55
50
45
40
35
Mounting Footprint
Derating Graph A2
Derating Graph E
Forward Current IF (mA)
Forward Current IF (mA)
Forward Current IF (mA)
30
25
20
15
10
5
0
0.0
20.0
40.0
60.0
80.0
6
100.0
30
25
20
15
10
5
0
0.0
20.0
40.0
60.0
80.0
100.0
30
25
20
15
10
5
0
0.0
20.0
R
G
6
40.0
60.0
80.0
100.0
Ambient Temperature Ta (°C)
Ambient Temperature Ta (°C)
Ambient Temperature Ta (°C)
to order
to order please contact us on: t:
+44 (0)1229 582 430
f:
+44 (0)1229 585 155
e:
sales@marl.co.uk
w:
www.leds.co.uk
© 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.
BS EN ISO 9001:2008
approved manufacturer
marl international limited - dsn 122 - version 2013-02-12-114852
page 2 of 5
122 series
de-rating information continued
Derating Graph F
55
50
45
40
35
Forward Current IF (mA)
30
25
20
15
10
5
0
0.0
20.0
40.0
60.0
80.0
100.0
Ambient Temperature Ta (°C)
to order
to order please contact us on: t:
+44 (0)1229 582 430
f:
+44 (0)1229 585 155
e:
sales@marl.co.uk
w:
www.leds.co.uk
© 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.
BS EN ISO 9001:2008
approved manufacturer
marl international limited - dsn 122 - version 2013-02-12-114852
page 3 of 5
122 series
also available
Part numbers also available in the 122 series:
Part
Colour
Number
122-000-01-54
122-000-01-56
122-000-01-58
122-000-01-59
122-000-01-60
122-000-04-50
122-000-04-52
122-000-04-54
122-000-04-56
122-000-04-59
122-000-04-62
122-000-04-63
122-305-01
122-305-01-50
122-305-04-05
122-311-01
122-314-01
122-314-01-50
122-314-04-05
122-314-13
122-316-04
122-317-04
122-320-04-50
122-326-04
122-330-04-50
122-332-04
Green/Red
Green/Yellow
Red/Green
Red/Yellow
R-Y/G
Yellow/Green
Red/Green
Green/Red
Green/Yellow
R/R
Green/Red
Yellow/Green
Red
Red
Red
Yellow
Green
Green
Green
Green
Yellow
Green
Blue
Blue
Red/Green
Green/Yellow
Vopr
2 mA dc
2 mA dc
2 mA dc
2 mA dc
2 mA dc
20 mA dc
20 mA dc
20 mA dc
20 mA dc
20 mA dc
20 mA dc
20 mA dc
2 mA dc
2 mA dc
20 mA dc
2 mA dc
2 mA dc
2 mA dc
20 mA dc
20 mA dc RP
20 mA dc
20 mA dc
20 mA dc
20 mA dc
20 mA dc
20 mA dc
Voltage
The products listed above illustrate all of the options available to order. These products may have custom modifications that
alter their operation beyond the generic information contained within this datasheet. Please contact sales for further
information.
to order
to order please contact us on: t:
+44 (0)1229 582 430
f:
+44 (0)1229 585 155
e:
sales@marl.co.uk
w:
www.leds.co.uk
© 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.
BS EN ISO 9001:2008
approved manufacturer
marl international limited - dsn 122 - version 2013-02-12-114852
page 4 of 5
122 series
design considerations
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.
Lead Cropping
Should lead cropping be required, Marl offer two standard lengths, either by request or by adding one of the following codes to
the end of the part number:-
-24 = 3mm.
-26 = 5mm (e.g 101-205-02-26)
Other non standard lead lengths are available on request.
Bi-Colour
2 pin operation. To achieve 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 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
to order please contact us on: t:
+44 (0)1229 582 430
f:
+44 (0)1229 585 155
e:
sales@marl.co.uk
w:
www.leds.co.uk
© 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.
BS EN ISO 9001:2008
approved manufacturer
marl international limited - dsn 122 - version 2013-02-12-114852
page 5 of 5
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