industrial panel lamps
features
specifications
to order
Typical characteristics (Ta = 25°C)
BS EN ISO 9001:2008
approved manufacturer
538 series
• Ø12.7mm mounting
• Product will operate over a wide input voltage range
• Robust stainless steel housing, sealed to IP67
• Fully internally potted to resist shock and vibration
• Colour diffused lens
• True bi-polar product for low voltage DC applications
• Other voltages, including DC options, are available
• Pack Quantity = 10 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
538-501-75 Red 110 Vac 6 600 630 -40 - +80 -40 - +100 D
538-521-75 Yellow 110 Vac 6 600 585 -40 - +80 -40 - +100 D
538-532-75 Green 110 Vac 6 800 515 -40 - +80 -40 - +100 F
538-930-75 Blue 110 Vac 6 230 465 -30 - +85 -40 - +100 U
538-997-75 White 110 Vac 6 1100 * See below -30 - +85 -40 - +100 I
538-501-63 Red 12-28 6-16 600 630 -40 - +80 -40 - +100 D
538-521-63 Yellow 12-28 6-16 600 585 -40 - +80 -40 - +100 D
538-532-63 Green 12-28 6-16 800 515 -40 - +80 -40 - +100 F
538-930-63 Blue 12-28 6-16 230 465 -30 - +85 -40 - +100 U
538-997-63 White 12-28 6-16 1100 * See below -30 - +85 -40 - +100 I
997F-C *Typical emission colour White
x 0.31 - - -
y 0.32 - - -
^ = 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.
- Intensities (lv) and colour shades of white (x, y co-ordinates) may vary between LEDs within a batch
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.
marl international limited - dsn 538 - version 2013-09-24-173433 page 1 of 5
technical data
Dimensions in mm (typical)
Not to scale
technical characteristics
Series Max. Power
Dissipation
Max. Reverse
Voltage Panel Cutout Nut Mounting
Torque
Min. Mounting
Centres
Max. Panel
Thickness
units mW Vdc mm Nm mm mm
to order
* = Current version ^ = Voltage version
BS EN ISO 9001:2008
approved manufacturer
538 series
17
3 29 6
17
3 29 5 12.7
+
0.3
0
Mounting Hole
2.8
Mounting hole to be clean and burr free.
Below 50Vac/dc
Above 50Vac/dc
housing material
Body
Nut
Panel Seal
push on connectors
Header
Termination
Lens
Encapsulation
Lock Washer
925-000-00 is brass tin plated - for use
with 538 series lamps
Dimensions in mm (typical). Not to scale.
Stainless Steel Grade 303
Stainless Steel Grade 303
Viton
Copper with Silver flash finish
Polycarbonate
PC5430 Resin
Stainless Steel
Nylon 6 A82
538 825 N/A 12.7 1.0 26.0 2.0 - 10.0
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.
marl international limited - dsn 538 - version 2013-09-24-173433 page 2 of 5
to order
de-rating information
BS EN ISO 9001:2008
approved manufacturer
538 series
0.0 100.080.060.040.020.0
55
5
0
15
25
35
45
Ambient Temperature Ta (°C)
Forward Current IF (mA)
Derating Graph D
10
20
30
40
50
0.0 100.080.060.040.020.0
55
5
0
15
25
35
45
Ambient Temperature Ta (°C)
Forward Current IF (mA)
Derating Graph F
10
20
30
40
50
0.0 100.080.060.040.020.0
55
5
0
15
25
35
45
Ambient Temperature Ta (°C)
Forward Current IF (mA)
Derating Graph I
10
20
30
40
50
8.5
also available
Part numbers also available in the 538 series:
Part
Number Colour Voltage
Vopr
538-521-76 Yellow 230 Vac 50 Hz
538-532-76 Green 230 Vac 50 Hz
The products listed here 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.
RP = Reverse Polarity
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.
marl international limited - dsn 538 - version 2013-09-24-173433 page 3 of 5
de-rating information continued
to order
BS EN ISO 9001:2008
approved manufacturer
538 series
0.0 100.080.060.040.020.0
55
5
0
15
25
35
45
Ambient Temperature Ta (°C)
Forward Current IF (mA)
Derating Graph U
10
20
30
40
50
8.5
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.
marl international limited - dsn 538 - version 2013-09-24-173433 page 4 of 5
design considerations
to order
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, please refer
to the de-rating graphs for correct operation. Marl accept no liability for any product that is operated higher than the stated
voltage.
BS EN ISO 9001:2008
approved manufacturer
538 series
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.
marl international limited - dsn 538 - version 2013-09-24-173433 page 5 of 5
