C1730 – Trasistor High Gain, Low Capacitance, and Fast Switching for TV Tuner Oscillator Applications

BC557 is a widely used PNP bipolar junction transistor manufactured in small TO-92 package. It is a general purpose PNP transistor that can be used as a switch or amplifier in electronic circuits. Its HFE ratings are 125 to 800 which makes it an ideal transistor to use as a small signal amplifier in electronic circuits for example for audio signal amplification or other, the HFE ratings of BC557 can be determined by the last letter after its number for example BC557A HFE ratings are 110-220, BC557B HFE ratings are 200-450 and BC557C HFE ratings are 420-800. The max collector dissipation is 500 milliwatt which is also an another good point to use it in amplification stages. Moreover it will also perform well when used it as a switch for load under 100mA. The transistor has also good collector to emitter (VCE) value that is -45V, therefore you can easily use it in circuits using 40 to 45 volts DC.

When you want a simple SWITCHING device for MEDIUM POWER LOADS. TIP31C is one of the basic TRANSISTORS out there which are easily available and cheap. With electrical characteristics suiting many applications it is fairly popular. So the component is best suited when choosing a random switching device.

Specification

• • I_C Collector current -3 A

• • I_CM Collector peak current (t_P < 5ms) -5 A

• • I_B Base current -1 A

• • V_CBO Collector - base voltage (I_E = 0) -100 V

• • V_CEO Collector - emitter voltage (I_B = 0) -100 V

• • V_EBO Emitter - base voltage (I_C = 0) -5 V

• • P_TOT Total dissipation at T_case = 25?C 40W? T_amb = 25?C 2W

• • T_stg Storage temperature -65 to 150 ?C

• • T_J Max. operating junction temperature 150 ?C