Product characteristics:
COOL BEAM
• Dichroic reflector reduces thermal
radiation in the light beam by 66%
• Low pressure technology complies to
IEC 60598-1. Lamp can be used
without extra protection from the
luminaire.
Filter
UV
• Integradet cover pan prefends the
soiling of the reflector.
• Meets the most stringent UVprotection thresholds (NIOSH).
Bleaching reduced.
• Base: GU 5,3
• Lampe life: 2000h
Range:
Order-code
Lamp without
cover lens
41860 SP
41860 WFL
41865 SP
41865 WFL
41870 SP
41870 WFL
Voltage Wattage* Beam
12V 20 W 10° 3150 cd HRGS/UB 20-12-GU5,3-51/10
" " 36° 510 cd HRGS/UB 20-12-GU5,3-51/36
" 35W 10° 6300 cd HRGS/UB 35-12-GU5,3-51/10
" " 36° 1050 cd HRGS/UB 35-12-GU5,3-51/36
" 50W 10° 8200 cd HRGS/UB 50-12-GU5,3-51/10
" " 36° 1500 cd HRGS/UB 50-12-GU5,3-51/36
angle**
Technical Information
Halogen lamp with dichroic reflector ∅ 51 mm
DECOSTAR 51/51S
Luminous
intensity**
ILCOS-code
Lamp with
cover lens
* Maximum permitted tolerance nominal value +8% acc. IEC 60357
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44860 SP
44860 WFL
44865 SP
44865 WFL
44870 SP
44870 WFL
**may vary according to tolerances specified in IEC 60357
12V 20 W 10° 3000 cd HRGS/UB 20-12-GU5,3-51/10
" " 36° 480 cd HRGS/UB 20-12-GU5,3-51/36
" 35W 10° 6000 cd HRGS/UB 35-12-GU5,3-51/10
" " 36° 1000 cd HRGS/UB 35-12-GU5,3-51/36
" 50W 10° 7800 cd HRGS/UB 50-12-GU5,3-51/10
" " 36° 1450 cd HRGS/UB 50-12-GU5,3-51/36
Technical light data:
Maintenance
Spectral distribution
visible light
Technical Information
Halogen lamp with dichroic reflector ∅ 51 mm
DECOSTAR 51/51S
Decrease of axial luminous intensity < 20% after 75% of the nominal life time.
DECOSTAR 12V/50W
UV-radiation
Due to UV-absorbing quartz glass respectively due to the integrated cover pan the bleaching is
Light distribution
The irradiance is clear below the NIOSH-threshold values for skin and eye.
clear reduced (depending on radiated material).
Available at www.myosram.com
HAL M-M, Edition November 05
Subject to alteration 2/4
Geometry:
Technical Information
Halogen lamp with dichroic reflector ∅ 51 mm
DECOSTAR 51/51S
Values in mm Nomin.* DECOSTAR 51/51S Dim. IEC-Norm*
Overall length C N
Length of Reflector N
+ F
max.
37,3 ± 0,4
max.
46 max.
35,8 - 38,4
Diameter of Reflector D 50,7 - 1,3 49,4 - 50,7
Width of Reflector edge A 0,3 min. 0,3 min.
Thickness of Reflector edge V
2 ± 0,2
1,8 -2,4
collar nomin. H1 x H
12,75 max. x 19,0 max.
2
distance 14 mm
see free space
IEC 60061
from collar end
Position GU-groove T
7,85 ± 0,35
7,45 - 8,25
Depth GU-groove 0,4 + 0,3 0,4 min.
Width GU-groove A
1
1,5 + 0,5 1,5 min.
Pin length F
Pin distance Ds
7 ± 0,5
5,33 ± 0,25
6,1 - 7,62
5,33
Pin diameter 1,53 1,45 - 1,60
Nominations and dimensions acc. IEC 60357, IEC 60061
Please note:
Dimensions and tolerances are subject to change within the IEC regulations! Not explicitly given
dimensions cannot be evaluated by measuring lamp samples!
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Technical Information
Halogen lamp with dichroic reflector ∅ 51 mm
DECOSTAR 51/51S
Temperature behaviour:
Measurement point (see
"Geometry")
Burning position
Max. temperatures permitted
acc. to IEC
Operating temperatures
measured free burning
50W 300°C 185°C 165°C 160°C
Operating conditions:
Burning positions
Dimmability
Areas of application
Near field
Safety informations:
When replacing conventional dichroic reflector lamps without cover pane by Decostar 51S,
Environmental sensitivity:
Validity:
Pinch Pin Reflector Joint
cap up
20W
35W
*For 20W and lower only 220°C are permitted according to IEC 60432.
Measurement conditions:
Measurement in the most unfavourable burning position for the pinch and pins.
The burning position only has a minimum influence on the temperature of the top part of
the reflector and on the joint.
Surrounding temperature: 25° (acc to DIN 5032)
Voltage: 12,0V
Lamp holder: Bender & Wirth 884
Operating temperatures for free burning use are not obliging and are useful only for
orientation.
Any
100%
For outdoor applications and operation in damp locations special approved fixtures are
required.
The lamps are not qualified for applications, whereat defined near field features are
necessary.
According to IEC 60598-1/DIN VDE 0711 "minimum security distance" the max.
temperature permitted is 90°C. This max. temperature has to be ensured by the minimum
distance. This distance has to be determined through the luminaire manufacturer by
appropriate measurements and specified on the luminaire.
temperature inside the lighting will rise. For this reason the suitability of the use of a
luminaire with a lamp with cover pane must be secured (see use instructions of control
gear).
DECOSTAR 51/51S can be disposed of as household waste.
In the first few hours of operation humidity may be expelled from the glue.
These technical information sheets (TI-sheets) are updated in irregular intervals. The user
is responsible to ensure that the information they have is up to date and still valid. Once a
new TI sheet has been issued, former editions are to be seen as invalid and disposed of.
P1 P2 P3 P4
350°C 250°C * - 240°C
155°C 100°C 115°C 110°C
230°C 140°C 145°C 140°C
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