Photo transistors KODENSHI ST-1KA・ST-1KB DIMENSIONS (Unit : mm) The ST-1KA and 1KB are high-sensitivity NPN silicon phototransistors mounted in durable, hermetically sealed TO-18 metal cans, which provide years of reliable performance, even under demanding conditions such as use outdoors. FEATURES •Wide angular response •Durable •High reliability in demanding environments •Two leads (Collector, Emitter) ST-1KA •Three leads (Collector Emitter, Base) ST-1KB APPLICATIONS •Optical counters •Optical detectors •Infrared sensors •Fiber optic communications ST-1KA MAXIMUM RATINGS ST-1KB (Ta=25℃) Item Symbol Rating Unit C-E voltage E-C voltage Collector current Collector power dissipation Operating temp. Storage Temp. Soldering temp. *1 VCEO VECO IC PC Topr. Tstg. Tsol. 40 4 50 150 -30~+100 -50~+150 260 V V mA mW ℃ ℃ ℃ *1.For MAX.5 seconds at the position of 2 mm from the package ELECTRO-OPTICAL CHARACTERISTICS Item Collector dark current Light current C-E saturation voltage Rise time Switching speeds Fall time Spectral sensitivity Peak wavelength Half anglee (Ta=25℃) Symbol Conditions ICEO IL VCE(sat) tr tf λ λp △θ VCEO=10V VCE=10V, 200lx*2 IC=2mA, 2,000lx*2 VCC=10V, IC=5mA, RL=100Ω *2. Color temp.=2856K standard Tungsten lamp - 1- Min. 0.5 Typ. Max. Unit. 1 2.0 0.2 0.8 10 500~1,050 880 ±50 200 5.0 0.4 nA mA V μsec. μsec. nm nm deg. Photo transistors ST-1KA・ST-1KB Collector current Vs. Collector - Emitter voltage Relative sensitivity Vs. Wavelength Collector current Vs. Illuminance Dark current Vs. Ambient temperature Swithing time Vs. Load resistance Radiant Pattern Collector power dissipation Vs. Ambient temperature - 2-