Description:
The SD1278 is a silicon NPN transistor in a 
stud mount package designed for amplifier, 
frequency mul-tiplier, or oscillator applications 
in military and industrial equipment. Suitable 
for use as output driver or pre driver stages, in
VHF and UHF equipment. 



Max collector to basis voltage 80V 
Max collector to emitter voltage 22V 
Max emitter to basis voltage 2V 
Max collector current 4000 mA 
Max junction temperature 200 C 
Max dissipation at 25 C free air 40 W 
Min cut-off frequency 200 MHz 
Transistor gain factor 10/200 (Ic=1000 mA)