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Free Transistor Equivalent Book - Download as PDF File .pdf), Text File .txt) or read VERSION SOT . DEFINITIONS Short-form specification The data in a short-form specification is extracted from a full data sheet with the same type. Transistor Equivalent Book 2sc - Free download as PDF File .pdf), Text File .txt) or read online for free. TRANSISTOR GUIDE. Linear IC Data Book. Vol. V. High Performance CMOS Logic Data Book. VI. .. tively, fully-functional devices must pass two critical stages prior to sales. Step 1.
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The orientation of the transistor may be clear from the PCB or stripboard layout diagram, otherwise you will need to refer to a supplier's catalogue or website to identify the leads. The drawings show the leads for some common transistor case styles. Note that transistor lead diagrams show the view from below with the leads towards you. This is the opposite of IC pin diagrams which show the view from above. Soldering Transistors can be damaged by heat when soldering so if you are not an expert it is wise to use a heat sink clipped to the lead between the joint and the transistor body.
You can download a special tool, but a standard crocodile clip without a plastic cover works just as well and is cheaper. Do not confuse this temporary heat sink with the permanent heat sink described below which may be required for a power transistor to prevent it overheating during operation.
Testing a transistor Transistors can be damaged by heat when soldering or by misuse in a circuit. Set a digital multimeter to diode test and an analogue multimeter to a low resistance range. Test each pair of leads both ways six tests in total : The base-emitter BE junction should behave like a diode and conduct one way only. The base-collector BC junction should behave like a diode and conduct one way only. The collector-emitter CE should not conduct either way.
The diagram shows how the junctions behave in an NPN transistor. The diodes are reversed in a PNP transistor but the same test procedure can be used. Testing an NPN transistor 2. Testing in a simple circuit Connect the transistor into the simple circuit shown. The supply voltage is not critical, anything between 5V and 12V is suitable. This circuit can be quickly built on breadboard for example. Take care to include the 10k resistor in the base connection or you will destroy the transistor as you test it!
If the transistor is OK the LED should light when the switch is pressed and not light when the switch is released.
Some multimeters have a 'transistor test' function which provides a known base current and measures the collector current so as to display the transistor's DC current gain hFE. BC The first letter B is for silicon, A is for germanium rarely used now. The second letter indicates the type; for example C means low power audio frequency; D means high power audio frequency; F means low power high frequency.
The rest of the code identifies the particular transistor. There is no obvious logic to the numbering system. Sometimes a letter is added to the end eg BCC to identify a special version of the main type, for example a higher current gain or a different case style. If a project specifies a higher gain version BCC it must be used, but if the general code is given BC any transistor with that code is suitable.
Codes beginning with TIP, e. The letter at the end identifies versions with different voltage ratings. Codes beginning with 2N, e. Choosing a transistor Most projects will specify a particular transistor but you can usually substitute an equivalent transistor from the wide range available.
The most important properties to look for are the maximum collector current IC and the current gain hFE. To make selection easier most suppliers group their transistors in categories determined either by their typical use or maximum power rating.
To make a final choice you may need to consult tables of technical data provided in catalogues, books and on-line. They contain a great deal of useful information but can be difficult to understand if you are not familiar with the terms and abbreviations used. IC max. VCE max. The guaranteed minimum value is given because the actual value varies from transistor to transistor - even for those of the same type! Note that current gain is just a number so it has no units.
The gain is often quoted at a particular collector current IC which is usually in the middle of the transistor's range, for example ' 20mA' means the gain is at least at 20mA.
Sometimes minimum and maximum values are given. Since the gain is roughly constant for various currents but it varies from transistor to transistor this detail is only really of interest to experts. Schematics 4 Free.
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Descending Ascending. Transistor Database. PDF Book. HR The Book. The hardware pinout book.