DTC144TT1 Datasheet, ON Semiconductor

EAK AT SOLDER JOINT DESIRED CURVE FOR HIGH MASS ASSEMBLIES 150°C 150°C 100°C 100°C 140°C SOLDER IS LIQUID FOR 40 TO 80 SECONDS (DEPENDING ON MASS OF ASSEMBLY) 50°C .

http://onsemi.com NPN SILICON BIAS RESISTOR TRANSISTOR
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* Simplifies Circuit .