L940-40xxx      Metal Stem High Reliability and High Power IR LED Lamp

The series of L940-40 is a GaAlAs LED mounted on a metal stem and covered with epoxy resin or hermetically sealed with Φ5 glass-lens can. On forward bias, it emits a high power radiation which peaks at 940nm.

Product Specification
Chip Material AlGaAs/AlGaAs
Peak Wavelength 940nm typ.
Package, Lens and Outer Dimension   
Part No. Stem Type Stem polarity Lens Dimension Fig
L940-40K00 TO-46 anode epoxy resin 1
L940-40K32 TO-46 anode spherical glass 2
L940-40K42 TO-46 anode aspheric glass 3
L940-40M00 TO-18 anode epoxy resin 4
L940-40M32 TO-18 anode spherical glass 5
L940-40T00 TO-18 anode epoxy resin 6
L940-40T32 TO-18 anode spherical glass 7
L940-40T52 TO-18 anode flat glass Φ3 8
Maximum Specification
Item Max   Ambient Temp.
Power dissipation, PD   140 mW Ta=25C
Forward current , I 100 mA Ta=25C
Pulse Forward current IFP  1 A Ta=25C
Reverse voltage, V 5 V Ta=25C
Operation temp., Topr  -30/+80 C
Storage temp. , Tstg   -30/+100 C
Solder temp., Tsol   260 C
 * Pulse Forward Current condition: duty=1% and Tw=1s
Electro-Optical Characteristics (Ta=25C)
Item Condition Min Standard Max
Forward voltage, VF IF =50mA 1.3 V  1.45 V
Reverse current , IR VR =5V   10 A  
Peak wavelength, lp IF =50mA 925 nm  940 nm  955 nm 
Half-Width, l   IF =50mA 50 nm
Rise-time tR IF =50mA 1 sec
Fall-time tF IF =50mA 0.5 sec
Total Radiated Power and Radiant Intensity at IF=50mA (Ta=25C)
 Part no.

 Total P 

Radiant  Viewing Half Angle
Min Typ intensity
L940-40K00 11 mW 15 mW    3 mW/sr 40
L940-40K32   5 mW 10 mW  30 mW/sr 10
L940-40K42   5 mW   9 mW  45 mW/sr 6
L940-40M00 11 mW 18 mW  10 mW/sr  40
L940-40M32   8 mW 13 mW  40 mW/sr 10
L940-40T00 10 mW 16 mW    8 mW/sr   60
L940-40T32   6 mW 11 mW  30 mW/sr  15
L940-40T52 3.5 mW   6 mW    3 mW/sr  55
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