NPN sensors are sometime called вЂњsinking sensorsвЂќ because they sink ground to the output.

PNP sensors are sometimes called вЂњsourcing sensorsвЂќ because they source positive power to the output. PNP transistors can also be used as switching devices and an example of a PNP transistor switch is shown below. 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. Transistors in electronic circuits do not fail often: as a result, when they do fail it can be difficult to diagnose the problem in the circuit. It can also withstand about 100V across its collector- Emitter hence can be used to drive heavy loads. It functions like a normal NPN transistor, but since it has a Darlington pair inside it has a good collector current rating of about 5A and a gain of about 1000. The TIP122 is a Darlington pair NPN transistor. In most NPN transistors it will be 1 (Collector), 2 (Base) and 3 ( Emitter ). To identify the pins, keep the front flat side facing you and count the pins as one, two etc. Pin Identification of Transistors In plastic casing, one side of the transistor is Flat which is the front side and the pins are arranged serially. What is the maximum collector current for transistor 2N3055? Its numbering follows the JEDEC standard. It was introduced in the early 1960s by RCA using a hometaxial power transistor process, transitioned to an epitaxial base in the mid-1970s. The 2N3055 is a silicon NPN power transistor intended for general purpose applications.

What are the characteristics of a NPN transistor?.

Can a 2N3055 pulse boundary be derated?.

How is the base connected in a 2N3055 NPN?.

How do you find the pin of a transistor?.What is the maximum collector current for transistor 2N3055?.

Rft 2n3055 transistor