How do you identify for an opened transistor?

How do you identify for an opened transistor?

Connect the base terminal of the transistor to the terminal marked positive (usually coloured red) on the multimeter. Connect the terminal marked negative or common (usually coloured black) to the collector and measure the resistance. It should read open circuit (there should be a deflection for a PNP transistor).

Can I use PNP transistor instead of NPN?

Generally, the PNP transistor can replace NPN transistors in most electronic circuits, the only difference is the polarities of the voltages, and the directions of the current flow. PNP transistors can also be used as switching devices and an example of a PNP transistor switch is shown below.

Is it necessary to match the replacement transistor package?

It is often necessary to match the replacement transistor package as closely as possible to enable the transistor to physically fit. Also the package may give an indication of other parameters. Voltage breakdown: It is necessary to make sure that the transistor is able to withstand the voltages it is likely to see.

How do you replace a transistor in a circuit board?

If the lead arrangement of a small replacement transistor differs from that of the original, you can sometimes bend the transistor leads across one another to route them into the correct holes in the circuit board. Just use a bit of spaghetti tubing on the leads to keep them from touching each other.

Where can I find the type number of a transistor?

Transistors typically come with full or partial type numbers printed on the body of the part. Fig. 1 below has an example of markings. Fig. 1 – Example of markings on a transistor Parts similar to the above transistor can be found by typing “bc547” into the Digi-Key search bar, or by typing in “bc547 transistor” in a search engine.

How to do cross reference search for transistors?

Datasheet. Cross Reference Search. Transistor Database. All Transistors. Datasheet. Cross Reference Search