Infrared LED
Peak emission wavelength: 1.45 μm
L10660 series
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The L10660 series is a high-power LED that emits infrared light at a peak wavelength of 1.45 μm. The LED is suitable for applica-
tions requiring use of infrared emitters with InGaAs photodiode.
Features Applications
Peak emission wavelength: 1.45 μm
High radiant output power
Light source for moisture meter
Light source for foreign object screening
Absolute maximum ratings (Ta=25 °C, unless otherwise noted)
Electrical and optical characteristics (Ta=25 °C)
Parameter Symbol Condition Value Unit
Reverse voltage VR1V
Forward current IF80 mA
Forward current decrease rate - Ta > 25 °C 1.1 mA/°C
Pulse forward current IFP Pulse width=10 μs
Duty ratio=1% 1.0 A
Pulse forward current
decrease rate - Ta > 25 °C 13 mA/°C
Power dissipation P 150 mW
Operating temperature Topr -30 to +85 °C
Storage temperature Tstg -40 to +100 °C
Parameter Symbol Condition L10660 L10660-01 Unit
Min. Typ. Max. Min. Typ. Max.
Peak emission wavelength λpIF=50 mA 1.4 1.45 1.5 1.4 1.45 1.5 μm
Spectral half width (FWHM) Δλ IF=50 mA - 120 170 - 120 170 nm
Radiant fl ux φeIF=50 mA 1.8 2.4 - 2.0 2.8 - mW
Forward voltage VFIF=50 mA - 1.0 1.5 - 1.0 1.5 V
Reverse current IRVR=1 V - -10- -10 μA
Cut-off frequency *fc IF=50 mA ± 10 mAp-p 10 15 - 10 15 - MHz
* Frequency at which the light output drops by -3 dB based on light output at 100 kHz.
www.hamamatsu.com
Infrared LED L10660 series
2
Emission spectrum
Directivity
Allowable forward current vs. duty ratio
Radiant flux vs. forward current
Radiant output vs. ambient temperature
Forward current vs. forward voltage
Allowable forward current vs. ambient temperature
KLEDB0311EB
KLEDB0326EA
KLEDB0225EA
KLEDB0312EA
KLEDB0327EA
KLEDB0325EA
KLEDB0328EA
Wavelength (nm)
Relative radiant output (%)
(Typ. Ta=25 °C, IF=50 mA)
1200 1300 1400 1500 1600
0
100
90
80
70
60
50
40
30
20
10
020406080100 20 40 60 80 100
Relative radiant output (%)
(Typ. Ta=25 °C)
80°
70°
60°
50°
40°
30°
80°
70°
60°
50°
40°
30°
20° 10° 0° 10° 20°
90° 90°
L10660-01
L10660
0.01
Duty ratio (%)
Allowable forward current (A)
0.01
0.1 1 10 100
0.1
1
10
Pulse width=1 µs
(Typ. Ta=25 °C)
Pulse width=100 µs
Pulse width=10 µs
Forward current (mA)
Radiant flux (mW)
(Typ. Ta=25 °C, tw=100 µs, 0.1%)
10 100 1000
0.1
1
10
100
L10660-01
L10660
Ambient temperature (°C)
(Typ. IF=50 mA)
-40 -20 0 20 40 60 80 100
-5
+3
+2
+1
0
-1
-2
-3
-4
Relative radiant output (dB)
Forward voltage (V)
(Typ. Ta=25 °C, tw=100 µs, 0.1%)
0.5 1.0 1.5 2.0 2.5
10
100
1000
Forward current (mA)
Ambient temperature (°C)
(Typ.)
0
120
110
100
90
80
70
60
50
40
30
20
10
Relative allowable forward current (%)
-40 -20 0 20 40 60 80 100
Cat. No. KLED1055E02 Jan. 2010 DN
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Infrared LED L10660 series
Dimensional outline (unit: mm)
5.4 ± 0.2
4.7 ± 0.1
Glass window
3.0 ± 0.1
3.6 ± 0.2
13.5 ± 1
2.54 ± 0.2
0.45 ± 0.05
Lead
Common to case
L10660 L10660-01
KLEDA0090EA KLEDA0091EA
4.65 ± 0.1
4.5 ± 0.2
6.65 ± 0.213.5 ± 1
5.4 ± 0.2
2.54 ± 0.2
Common to case
0.45
± 0.05
Lead
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