LUCKY LIGHT
Part No.
LL-204HD2A Spec No.
S/N-01030312D Page 1 of 4
 
 
LL-204HD2A 
 
DATA SHEET 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
QC:                ENG:                Prepared By:  
 
LUCKY LIGHT
Part No.
LL-204HD2A Spec No.
S/N-01030312D Page 2 of 4
Features 
Normal tower type pack 
Wide viewing angle 
General purpose leads 
Reliable and rugged 
Package Dimension: 
         
26.0(1.024)MIN
1.0(.039)MAX
0.5(.02)
ANODE
2.54(.1)
1.6(.063)
2.4(.094)
3.0(.118)
3
.
3
(
.
1
3
)
1
.
7
(
.
0
6
7
)
 
 
Part NO.  Lens Color Source Color 
LL-204HD2A Red Diffused Red 
 
Notes: 
1. All dimensions are in millimeters (inches). 
2. Tolerance is ±0.25(.010”)mm unless otherwise noted. 
3. Protruded resin under flange is 1.0mm(.04”) max 
4. Lead spacing is measured where the leads emerge from the package. 
5. Specifications are subject to change without notice 
 
LUCKY LIGHT
Part No.
LL-204HD2A Spec No.
S/N-01030312D Page 3 of 4
Absolute Maximum Ratings at Ta=25 
Parameter  MAX.   Unit 
Power Dissipation   100  mW 
Peak Forward Current 
(1/10 Duty Cycle, 0.1ms Pulse Width)  100  mA 
Continuous Forward Current  50  mA 
Derating Linear From 50℃  0.4  mA/℃ 
Reverse Voltage  5  V 
Operating Temperature Range  -40℃ to +80℃ 
Storage Temperature Range  -40℃ to +80℃ 
Lead Soldering Temperature 
[4mm(.157”) From Body]  260℃ for 5 Seconds 
Electrical Optical Characteristics at Ta=25 
Parameter  Symbol  Min.
 
Typ.
 
Max.
 
Unit
 
Test Condition 
Luminous Intensity  Iv  700
1300
 
---
 
μcd  =20mA (Note 1) 
Viewing Angle  2θ1/2  45  50  55  Deg  (Note 2)  
Peak Emission Wavelength
 
λp  ---
700    mA  =20mA 
Dominant Wavelength  λd    697    nm  =20mA (Note 3) 
Spectral Line Half-Width
 
△λ  ---
90  ---
 
nm  =20mA 
Forward Voltage    1.7
2.1  2.80
 
V  =20mA 
Reverse Current    ---
---  100
 
μA  =5V 
Note: 
1.Luminous intensity is measured with a light sensor and filter combination that 
approximates the CIE eye-response curve. 
2.θ1/2 
is the off-axis angle at which the luminous intensity is half the axial luminous 
intensity. 
3.The dominant wavelength (λd) is derived from the CIE chromaticity diagram and 
represents the single wavelength which defines the color of the device. 
 
LUCKY LIGHT
Part No.
LL-204HD2A Spec No.
S/N-01030312D Page 4 of 4
Typical Electrical / Optical Characteristics Curves 
(25℃ Ambient Temperature Unless Otherwise Noted)  
 
Spectral Radiance (Peak @ 700nm)
0.0
0.2
0.4
0.6
0.8
1.0
500 520 540 560 580 600 620 640 660 680 700 720 740 760 780 800 820 840 860
Wave Length(nm)
Normalized
Response
Forward Current
vs Forward Voltage
0
10
20
30
40
50
1.7 1.9 2.1 2.3 2.5 2.7 2.9 3.1
Forward Voltage VF(V)
Forward Current IF(mA)
Relative Luminous Intensity
vs Forward Current
0
0.5
1
1.5
2
2.5
3
0 10 20 30 40 50
Forward Current IF(mA)
Relative Intensity
(LOP@20mA=1)
0.4
Relative Intensity (LOP@MAX=1)
1.0
-90
-60
0.60.8
-30
0.60.2 0.40.2 90
1.00.8
60
30
Beam Pattern
0