KPT-2002-000 1
ST3811
Photo Transistor
Features
• φ3mm(T-1) all plastic mold type
• Visible light cut-off type
Features
• VCR, Camcorders
• Floppy disk drivers
• Optical detectors
Outline Dimensions unit : mm
25.0MIN
1.0MIN
0.5±
0.1
3.8
12
2.54NOM 1
0.5
5.0±0.2
4.0±0.2
3.0±0.2
2
S
Se
em
mi
ic
co
on
nd
du
uc
ct
to
or
r
PIN Conne cti ons
1. Emitter
2.Collector
KPT-2002-000 2
ST3811
Absolute maximum ratings
Characteristic Symbol Ratings Unit
Collector-Emitte r Volta ge VCEO 35 V
Emitter-Collecto r Volta ge VECO 6V
Collector Current IC20 mA
Collector Power Dissipation PD75 mW
Operating Tempe rature Topr -25～85 ℃
Storage Temperature Tstg -30～100 ℃
*1Solde ring Tempe rature Tsol 260℃ for 5 seconds
*1.Keep the distance more than 2.0mm from PCB to the bottom of Photo TR package
Electrical Characteristics
Characteristic Symbol Test Condition Min. Typ. Max. Unit
Current Dark Current ICEO VCEO=10V, Ee=0 - 0.05 0.5 uA
*3Light Current ICEL VCE=5V, Ee≒1mW/㎠-4.5-mA
Cur r ent-Emitter Satur a tion Voltage VCE(sat) IC=0.5mA, Ee≒1mW/㎠-0.2- V
Rise Time tr2.5
Sw itc hing Time Fall T ime tf
VCC=10V, IC=1mA
R1=100Ω-3.8 -us
Spectral Sensitivity λ- 700 ~ 1000 nm
Peak Sensitivity Waveleng th λ
P- - 880 - nm
Half angle θ1/2 IF= 20mA - ±20 -deg
*1. Tolerance = ±30%
KPT-2002-000 3
ST3811
Characteristic Diagrams
Fig.4 ICEO – Ta
Fig. 3 PD – Ta
Fig. 2 ICEL - VCE
Fig. 1 ICEL - Ee
P ower Dissipation PD [mW]
Ambient Temperature Ta [℃]
Relative Intens ity [%]
Wavelength λ [nm]
Irradiance Ee [mW/㎠]
Light Current ICEL [mA]
Collector - Emitter Voltage VCE [V]
Fig. 5 Spectrum Sensitivity
Relative Luminous Intensity Iv [%]
Ambient Temperature Ta [℃]
Collector Dark Current ICEO [uA]
Fig. 5 Sensitivity Diagram
Light Current ICEL [mA]
