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DATA SHEET
( 2 ) Electro-optical Characteristics
( Tc=25 C )
Parameter
Condition
IF=120mA
IF=120mA
Symbol
VF
Min.
35.0
242
Typ.
37.2
285
Max.
42.0
-
Unit
V
Forward Voltage
Luminous Flux
Φv
lm
General Color
IF=120mA
Ra
-
-
85
-
-
-
Rendering Index
Junction-case
Thermal Resistance
Rj-c
6.0
C/W
Chromaticity coordinates ( Condition : IF= 120mA , Tc=25 C )
Color rank
Center
Referenceꢀ(ANSI C78.377)
Color rank
Center
x
y
x
y
0.4578
0.4101
0.4578
0.4813
0.4562
0.4373
0.4593
0.4101
0.4319
0.4260
0.3893
0.3944
(2725K)
Oval parameter
a
b
c
L2
L2
a
b
0.00774
0.00411
57.28
θ°
d
*Color region stay within MacAdam "3-step" ellipse from the chromaticity center.
*The chromaticity center refers to ANSI C78.377:2008.
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)
ꢀ
x-y chart-CIE1931
0.44
2900K
2700K
2500K
0.43
0.42
0.41
0.40
0.39
0.38
Color region
Color region
(ANSI)
2800K
2600K
0.43
0.44
0.45
0.46
x
0.47
0.48
0.49
Note: The tolerance of measurement at our tester is VF+/-3%, Φv+/-10%, Chromaticity(x,y)+/-0.005
and Ra+/-1.
CITILED
Symbol
Name
CL-L251A-MC4L2-C
CITIZEN ELECTRONICS CO.,LTD. JAPAN
Ref.CE-P1003 03/11 R1(0711)