| Parameter | КТ3109А | КТ3109Б | КТ3109В | |
|---|---|---|---|---|
Collector-base voltage at a given reverse collector current and open emitter circuit  | UCBO  | <30 V | <25 V | <25 V | 
Voltage between the collector and the emitter of the transistor with an open base circuit and a given emitter current  | UCEO  | <25 V | <20 V | <20 V | 
Constant power dissipated on the transistor collector  | PC  | <170 mW | ||
Static current transfer coefficient of bipolar transistor  | hFE  | >20 | >20 | >15 | 
Обратный ток коллектора. Ток через коллекторный переход при заданном обратном напряжении коллектор-база и разомкнутом выводе эмиттера  | ICB-R  | <100 nA | ||
Limit frequency of current transfer coefficient of a bipolar transistor  | fh21  | <800 MHz | <300 MHz | <600 MHz | 
Noise factor  | NF  | <6 dB | <7 dB | <8 dB | 
Bipolar transistor structure  | Structure  | PNP | ||