transistor base emitter collector identification

A different transistor's pins may be in the order b, c, e from left to right. This is especially true for transistors in the plastic TO-92 package.Īs an example, when the KSP2222 (or PN2222) transistor's flat side (the side with the part number printed on it) is facing you with the pins down, the pins are e, b, c (emitter, base, collector) from left to right. transistors with different part numbers) won't necessarily have the pins in the same order. 2N2222, BC107, BC108 and BC109 Transistor Pinout Diagramĭifferent transistors (i.e. The way that a 2N2222, BC107, BC108 and BC109 transistor symbol maps to the physical device is shown in the diagram below. Transistors have three pins called emitter (e), base(b) and collector(c). Metal Can and Plastic Packaged Transistors Transistors Pins The KSP2222 is an equivalent of the 2N2222 but is packaged in a plastic package known as a TO-92 package. The 2N2222 is packaged in a metal can package known as a TO-18 package. They have the part numbers 2N2222 and KSP2222 (also available as PN2222). A PNP transistor must give an over-limit (OL) message. Check the reading on your digital multimeter. Connect the negative lead to the emitter of your transistor. In the photo below, two different transistors are shown. Take your digital multimeter and insert the positive lead to the transistor’s base. Transistor Part NumbersĮach transistor has a part number. The bigger the package is, the more power the transistor can handle. These are the names of the packages and not the transistor part numbers. demonstrate and measure the effects on base. Transistors can be packaged in many different packages, some examples are shown below: Examples of Different Transistors in Different Packagesĭifferent packages have different names, e.g. good for objectives: identify base, emitter and collector terminals and connections of npn and pnp transistors. The symbols used in circuit diagrams for NPN and PNP transistors are shown below: Circuit Diagram Symbols of NPN and PNP Transistors Transistor Packages There are two types of BJTs, namely NPN and PNP. You may also want to check out these topics given below Applications of transistors Bipolar Junction. Based on the requirement the type will be chosen for the circuit. Transistor collector-emitter test current. Each of these three circuit configurations has its own characteristics curve. identify the type of component (Inductor, Capacitor or Resistor) together with the components main value. Here the BJT (Bi-polar Junction Transistor) is discussed. Common Emitter Transistor Common Base Transistor Common Collector Transistor(emitter follower). There are several kinds of transistors available, e.g.

Transistor base emitter collector identification