The BC is a general-purpose NPN bipolar junction transistor commonly used in European and American electronic equipment. It is notably often the first type. Features: • NPN general purpose transistors, especially suited for use in driver stages of audio amplifiers, low noise input stages of tape recorders, HI-FI. A BC transistor is a negative-positive-negative (NPN) transistor that is used for many purposes. Together with other electronic components, such as resistors, .

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When choosing the right transiztor for this job, first I’ll eliminate the PNP transistors. The siren needs 12V and consumes about mA. There is lot of variation in the ft-transition maximum frequency from manufacturer to manufacturer.

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As mentioned the biasing current should maximum of 5mA. Would this mean that I need the PNP configuration to be able to switch both positive leads? Sometimes the middle pin is supplied bent to form a triangle of leads as found in TO case transistors and, for example, the ZTXL to match the pinout of the Transidtor more exactly. All articles with transiator statements Articles with unsourced statements from March Articles needing additional references from March All articles needing additional references.

Still have a question? How does an enhancement transistor work?

Choosing the right transistor for a switching circuit – Electrical Engineering Stack Exchange

Choosing Motor For Robots. When this transistor is fully biased then it can allow a maximum of mA to flow across the collector and emitter. Ok that explains my question very well, thank you.


The voltage divider is the commonly used biasing mode. This resistor restricts the current flow through the highest base current. Alin Mar 31 ’12 at I have found various calculations to determine what kind of transistor I need and I’m not quite sure which is the best one. When the collector-to-emitter current flows, there will be a voltage drop in the limiting resistor, and in the idle state, the collector voltage is typically 6 V. BC is used in common emitter configuration for amplifiers.

It is commonly used to amplify current. Retrieved 17 March Because, the amplifying properties of transistor come from the resultant control that the base utilizes upon the collector to emitter current. To bias a transistor we have to supply current to base pin, this current I B trnasistor be limited to 5mA. Interface SD Card with Arduino. Fix the transistor over a veroboard by soldering transistot leads.

Home Questions Tags Users Unanswered. Together with other electronic components, such as resistors, coils, and capacitors, it can be used as the active component for switches and amplifiers.

BC is mainly used for amplification and switching purposes.

This group of NPN transistors share many specifications and characteristic curves, but differ in voltage ratings – the BC and BC are essentially the same as the BC but selected with higher breakdown voltageswhile the BC is a low noise version, and the BC is both high-voltage and low-noise.

This section needs additional citations for verification. Some manufacturers place slightly different limits on the gain groups, for example the “B” group has been quoted as in a Philips datasheet.

The negative N -type material inside an NPN transistor has an excess of electrons, while the positive P -type material has a lack of electrons, both due to a contamination process called doping.


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I’d rather not have to use a relay or a SSR because I don’t have any on hand. Arrays are commonly used in digital switching. If you are designing a PCD or Perf board with this component then the following picture from the Datasheet will be useful to know its package type and dimensions. Unsourced material may be challenged and removed. Choosing the right transistor for a switching circuit Ask Question.

I want to control a siren speaker has a built-in driver with transisgor Arduino. If you chose to drive the base of the transistor with a 1KOhm resistor, you’ll have a 3.

Transistor BC547

How do flip flops work with transistors? Can we use a transistor BC instead of BC? How do transistors in CPU’s work? What is Web Browser. What is a power transistor and how does it work?

The value of this teansistor R B can be calculated using below formulae. Amplifier modules like Audio amplifiers, signal Amplifier etc. BC has a gain value of tothis value determines the amplification capacity of the transistor.

Probably a little late to matter, but there you go. I’m using Amps, Volts, and Ohms as units. The main characteristic of this transistor action is the connection between the input and output circuits.

Electronics Circuits and Systems. BC is an NPN bi-polar junction transistor.