DATA SHEET
CITILED COB Series
Standard Type
Ra90 Model
CLU028-1203C4
Introduction
Performance Characteristics
Mechanical Dimensions
Characteristic Curves
Reliability
Packing Specification
Precaution
P 2
P 3
P 5
P 6
P 9
P 10
P 11
1
Ref.CE-P3535 02/16
Product Nomenclature
CLU028 - 12 03 C4 - 27 3 H5 K2
[1]
[1]
[2]
[3]
[4]
[5]
Product shape
Die count in series
Die count in parallel
Nominal CCT
CRI (Ra)
[2]
[3]
[4]
CLU028
12
03
2700K
Min.90
[5]
1. Introduction
1-1. Product Description
CITIZEN ELECTRONICS is the first COB manufacture. Our advanced knowledge and packaging technology for many
years has excellent reliability and high quality of our products. CITILED COB Series covers a wide range of luminous flux
from a 10W incandescent bulb to a 500W mercury lamp in general lighting sources. The element arrangement of LED
package is capable of utilizing light more effectively and higher performance.
The new version of CITILED COB Series succeed to reduce the thermal resistance significantly. New version creates
more options to match luminaire's products design (ex. High performance , Cost effective , Higher lumen density ,
Increased allowable max. If). The outline and LES size is same since version 1. 3-step MacAdam ellipse color definition at
Tj=85
℃
is available.
1-2. Features
2
Ref.CE-P3535 02/16
2. Performance Characteristics
2-1. Electro Optical Characteristics
Electro Optical Characteristics
( Tj=85C )
Nominal
CCT
CRI
Ra
Min.
CLU028-1203C4-273H5K2
CLU028-1203C4-303H5K2
CLU028-1203C4-353H5K2
CLU028-1203C4-403H5K2
Notes :
1. Citizen Electronics maintains forward voltage +/-3%, luminous flux +/-10%,Ra and R9 +/-1.
*Values of Luminous flux at Tc=25C are provided as reference only.
2700K
3000K
3500K
4000K
90
90
90
90
R9
Min.
50
50
50
50
Luminous flux
( lm )
Efficacy Forward
( lm/W ) Current
Tc=25C*
( mA )
Typ.
Typ.
1,180
1,233
1,255
1,270
114
119
122
123
270
270
270
270
Voltage
( V)
Min.
31.8
31.8
31.8
31.8
Typ.
34.6
34.6
34.6
34.6
Max.
37.5
37.5
37.5
37.5
Thermal
Resistance
Rj-c
(
C/W )
1.1
1.1
1.1
1.1
Product code
T½=85C
Min.
940
982
1,000
1,012
Typ.
1,069
1,117
1,137
1,151
2-2. Absolute Maximum Ratings
Absolute Maximum Ratings
Parameter
Input Power (W)
Forward Current (mA)
Reverse Current (mA)
Operating Temperature (C)
Storage Temperature (C)
Case Temperature (C)
Junction Temperature (C)
Symbol
Pi
If
Ir
Top
Tst
Tc
Tj
Rating
29.4
690
1
-40 ~ +100
-40 ~ +100
105
140
*2
*3
*1
*1
*1. Input power and forward current are the values when the LED is used within the range of the derating
curve in this data sheet.
*2. Refer to 3. Outline drawing for Tc measurement point.
*3. D.C. Current : Tj = Tc + Rj-c
×
Pi
3
Ref.CE-P3535 02/16
2-3. Chromaticity Characteristics
( Rated current, Tj=85C )
Oval parameter
Color Region
Nominal
CCT
2700K
3-step MacAdam ellipse
3000K
3500K
4000K
Center Point
( x, y )
( 0.4577 , 0.4098 )
( 0.4339 , 0.4032 )
( 0.4078 , 0.3929 )
( 0.3818 , 0.3796 )
Major Axis
a
0.00774
0.00834
0.00951
0.00939
Minor Axis
b
0.00411
0.00408
0.00417
0.00402
Ellipse
Rotation Angle
θ
57.28
53.17
52.97
54.00
* Color region stay within MacAdam 3-step ellipse from the chromaticity center.
* The chromaticity center refers to ANSI C78.377:2011.
Please refer to ANSI C78. 377 for the chromaticity center.
* θ is the angle between the major axis of the ellipse and the x-axis, and a and b are the major and minor semi-axes of an ellipse.
(Ref. IEC 60081:1997 AnnexD)
0.45
x-y chart CIE1931
3,000K
3,500K
2,700K
0.40
4,000K
Black
Body
Locus
y
0.35
3-step
0.30
0.30
0.35
0.40
x
0.45
0.50
Note : Citizen Electronics maintains chromaticity ( x, y ) +/-0.005
4
Ref.CE-P3535 02/16
3. Mechanical Dimensions
・Internal
Circuit
Marking 1 :
Serial No.
Marking 2 : H 12 3 ** **
CRI
CCT
Dies count in parallel
Dies count in series
Protection
device
Anode
LED device
Cathode
12 s 3 p
5
Ref.CE-P3535 02/16
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