Transistor 8050 is a very common NPN transistor, which is often seen in various amplifier circuits and has a wide range of applications, mainly for high-frequency amplification. Can also be used as a switching circuit.

technical parameter:

Type: switch type;

Polarity:NPN;

8050 transistor (SOT-23 package)

8050 transistor (SOT-23 package)

Material: Silicon;

Maximum collector current (A): 0.5 A;

DC gain: 10 to 60;

Power consumption: 625 mW;

Maximum collector-emitter voltage (VCEO): 25;

Eigen frequency: 150 MHz

PE8050 Silicon NPN 30V 1.5A 1.1W

3DG8050 Silicon NPN 25V 1.5A FT=190 *K

2SC8050 Silicon NPN 25V 1.5A FT=190 *K

MC8050 Silicon NPN 25V 700mA 200mW 150MHz

CS8050 Silicon NPN 25V 1.5A FT=190 *K

Pin identification:

Triode pin identification method:

(a) Determine the base. Use the multimeter R×100 or R×1k to measure the forward and reverse resistance values between each of the three electrodes of the tube. When the first test lead is used to connect a certain electrode, and the second test lead is in contact with the other two electrodes and the low resistance is measured, the electrode connected to the first test lead is the base electrode b. At this time, pay attention to the polarity of the multimeter pen, if the red pen is connected to the base b. When the black test leads are connected to the other two poles, the measured resistance values are all small, and it can be determined that the tested tube is a PNP type triode; if the black test lead is connected to the base b and the red test lead is in contact with the other two poles, the measured resistance If the resistance value is small, the tested triode is an NPN type tube such as 8050, 9014, and 9018.

(b) Determine the collector c and emitter e of the transistor. (Take PNP type triode as an example) Put the multimeter in the R×100 or R×1K block, pinch the base and the assumed collector with your hands (assuming either of the remaining two poles is the collector and one is the emitter), black The contact of the test pen assumes the collector, and the contact of the red test pen assumes that the emitter pointer has a large deflection, and it is assumed to be correct, but it is wrong anyway. Further verification, replace the assumed collector and assumed emitter, repeat the operation, the assumption that the pointer is deflected larger in two times is correct; the npn type red and black test leads are opposite.

How to judge the quality of the triode without disassembling it:

In practical applications, low-power triodes are mostly directly welded on the printed circuit board. Due to the high installation density of the components, it is more troublesome to disassemble. Therefore, the voltage of each pin of the tested tube is often measured by using the DC voltage block of a multimeter during testing. value, to infer whether its work is normal, and then judge the quality of the triode.

If it is an NPN like 8050 and 9014, use a multimeter to detect their pins. The black test lead is connected to one pole, and the red pen is used to connect the other two poles. When both poles have a resistance of 5K, the black test lead is connected to the B pole. At this time, the black and red test pens are used to connect the other two poles, the black test lead is connected to the pole and the B pole, and the black meter with the small resistance value is connected to the C pole. (The above is measured with a pointer meter. The digital meter is a red-pen digital multimeter. The positive and negative levels inside the digital multimeter are opposite to that of the pointer meter.)