Introduction to 2sc4617
Hey Fellas! Hope you are doing great. I am here to give you the daily dose of information relating to engineering and technology. Today, I am going to give you the details on the
Introduction to 2sc4617. It is an NPN (negative-positive-negative) transistor which is used for general purpose amplification. This component comes in SC-75/SOT-416 sealed package which is mostly used for low power applications. I am going to explain the brief overview of 2sc4617. Let's get started.
Introduction to 2sc4617
- 2sc4617 is a three terminal NPN silicon transistor which consists of two N doped layers which cover one P doped layer. It is a bipolar transistor which is usually used for amplification purpose.
- Small amount of base current is used to handle the large current on the emitter and collector side.
- Supply voltage at collector is positive with respect to emitter.
- Free movements of electrons from its base side is used to control the current between emitter and collector.
- This device comes in a compact form, that it reduces the space to put all device in one place.
- Most of the old transistors were made of germanium. New transistor are made up of silicon.
- In the ON state of the transistor, current will flow from emitter to collector.
- The voltage between collector and base is 50 V and is denoted by Vcb.
- The voltage between collector and emitter is also 50V and is denoted by Vce.
- Collector current is 100mA and is denoted by Ic.
- Maximum power dissipation is 125 mW.
- Whole device comes in a sealed form and is placed on the glass epoxy printed circuit.
2sc4617 Pinout
Pinout of 2sc4617 silicon transistor is shown in the figure below.
This transistor consists of three terminals.
1: Base
2: Emitter
3: Collector
- Transistor 2sc4617 is also known as current operated device.
- It is mainly used for amplification purpose.
- The way base current effects the emitter and collector current is used for amplification purpose.
Circuit Symbol of 2sc4617
Circuit symbol of 2sc4617 is shown in the figure given below.
- 2sc4617 is an NPN transistor, and it will source the base current to the transistor.
- Base of the transistor is more positive than emitter.
- Current at the emitter side is equal to the sum of current at the base and collector side.
- The measure of number of electrons that pass from base to collector is called transistor efficiency.
- Base is lightly doped and emitter is heavily doped that will allow the electron to move from emitter to base more than it will allow the holes from base to emitter.
- Ratio between collector current and base current is called forward current gain. It has a standard value of 200.
- Forward current gain is represented by beta ß.
- Value of beta ranges between 20 to 1000.
- Ratio between collector current to the emitter current is called current gain of the transistor and it is denoted by alpha a.
- Value of alpha ranges between 0.95 to 0.99. However, most of the cases value of alpha is considered as unity.
- Transistors are always operate in forward biased mode. If we interchange emitter and collector and makes it reverse biased, then the value of alpha and beta will be much lesser than they will be in forward biased mode.
- This NPN transistor has low impedance at the base side.
Maximum Rating of 2sc4617
Maximum current and voltage rating of 2sc4617 is given in the figure below.
- The voltage between collector and base is 50 V and the voltage between collector and emitter is also 50V.
- Collector current is 100mA and is denoted by Ic.
- Rating given above, if increased from given limits, can damage the device at large.
Thermal Characteristics of 2sc4617
Thermal features of this bipolar transistor is given below.
- Power dissipation is 125mW.
- These thermal characteristics are important for tuning your circuit requirements.
Electrical Characteristics of 2sc4617
Electrical characteristics are of great value. They are shown in the figure below.
- It is important to note that, these electrical characteristics don't indicate the overall performance of this device.
- These electrical characteristics are measured at the temperature of 25 ºC
Applications
- 2sc4617 is mostly used in coin processing machines.
- They are widely used in PLC (programmable logic controllers)
- Used for controlling DC and servo motors
- Used for general purpose amplification.
That's all for today. I have tried my best to explain each and everything regarding this 2sc4617 transistor. However, if you still find any difficulty in understanding the concept of this transistor, you can ask me in the comment section below. I'll be happy to help you in this regard. Thanks for reading the article. Stay tuned for next article. Good Bye!
Introduction to 2n4391
Hey everyone! Hope you all are doing great. Today, I am going to give you the details on the
Introduction to 2n4391. It is a simple N type JFET (Junction field effect transistor) which consists of three terminals called drain, source and gate and are denoted by D, S and G receptively. It is mostly used in analog switches and current limiters. I am going to give you a brief details on this transistor. Let's get started.
Introduction to 2n4391
- 2n4391 is a field effect transistor that consists of three terminals known as drain, source and gate.
- It is called field effect transistors because static field performs as important part in the operation of this transistor.
- Unlike normal transistors, it is a voltage controlled device as it doesn't require any biasing current to control large amount of current.
- It conducts, when current flows between drain and source terminals.
- A JFET is considered fully ON as long as no potential difference appears between source and gate terminals. Similarly, applying a negative gate-source voltage will turn off JFET.
- It restricts the flow of current if there appears any potential difference between source and gate terminals.
- A JFET comes in two types, N type and P type channel. 2n4391 is a N type JFET where voltage at the source terminal is greater than the voltage at gate terminal.
- 2n4391 is composed of semiconductor material which contains negative charge carriers such as electrons.
- In JFET, the flow of current is handled by limiting the channel through which current is flowing.
- Current also has a large effect on the electric field between drain and source.
- 2n4391 comes with high speed analog circuit performance and low error voltage.
- It has excellent accuracy, good frequency response that eliminates the additional buffering.
2n4391 Pinout
Pinout of field effect transistor 2n4391 is shown in the figure given below:
2n4391 consists of three terminals
1: Drain
2: Source
3: Gate
- It will conduct when current flows between drain and source terminals.
- In this N type FET voltage at the gate terminal is used to handle the current flowing through the device.
Working of 2n4391
- Movement of election plays an important role in the operation of all transistors.
- Conducting channel in this N type JEFT is made by field effect process.
- In N-type JFET, flow of electrons between source and drain is restricted by the number of holes in the gate terminal.
- However, an electric filed is generated when we apply positive voltage at the gate terminal. It results in the flow of electrons from source to drain terminal, that ultimately switches on the transistor.
- Current is generated by the addition of "field effect", that's why these transistors are named as field effect transistors.
- Coating silicon layers with metal oxide gives this component a different name called MOSFET ( Metal Oxide Semiconductor Field Effect Transistor).
Absolute Maximum Ratings of 2n4391
Absolute maximum ratings of this N type JFET is given in the figure below.
- Gate-Drain and Gate-Source voltage is -40V.
- Gate current is 10mA.
- It is important to note that ratings more than given on the above table can damage the device at large.
- These are the stress rating that can be implied duration the operation of this JFET.
- Similarly, if these rating are implied more than given time period, they can effect the reliability of device.
Comparison between JFET and Bipolar Junction Transistors
- JFET are like normal transistors with some exceptions. In case of JFET, layers of N-type silicon material are coated with metal and oxide and they are placed in a different way than normal transistors.
- Normal junction transistors are bipolar transistors i.e. they will conduct by the movement of electrons and holes in transistors.
- JFET are uni-polar transistors, i.e. they either conduct with the movement of electron in N type transistors or movement of holes in P type transistors.
- Both junction transistors and JFET come with great accuracy, show instant operation and both are robust and cheap.
- However, in most of the electronic application JFET evidently replace bipolar transistors.
Applications
- It is a good choice for specialized amplifier circuits and analog switching application.
- It is mostly used in commutators and choppers.
That's all for today. I hope you have got a clear idea of this N type JFET. However, if still you feel any doubt or have any question regarding this FET, I'd glad to help you in this regard. Your suggestions and feedbacks will be highly appreciated. Stay tuned!