BC817-16W,135

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BC817-16W,135 Application Field and Working Principle

The BC817-16W,135 is a type of bipolar junction transistor designed to switch electronic signals in a circuit. It is classified as a “Single” transistor, meaning it only has two active terminals, known as the collector and emitter. Technically, Single transistors are considered “discrete” components, meaning they are singular as opposed to integrated onto a chip with many other components.

“Bipolar” simply refers to the type of current that the transistor is designed to use, meaning two different voltages of electrical current (most commonly between zero volts and the voltage of the power supply). Thus, a Bipolar Junction Transistor functions as a type of switch, and it is by varying the voltage that determines whether it is on or off.

BC817-16W,135 transistors are defined by their collector-emitter breakdown voltage and their maximum power dissipation rating. Static current gain (also known as hFE), noise figure, and frequency of operation are usually specified as well.

The BC817-16W,135 is designed to be used in signal switching applications, such as amplifying speech, controlling relays, toggling LEDs and light intensity and more. Being static components, their low current draw, high voltage rating and high frequency capabilities make these transistors ideal for applications that power SMPS, switching power supplies and many other commonly found electrical and electronic components.

This transistor can work with a maximum voltage (Vce) of 16V, a maximum current (Ic) of 135mA and a maximum power dissipation (Pd) of 500mW. These specs, along with its low cost and small form factor, make the BC817-16W,135 an ideal choice for many applications.

The working principle of the BC817-16W,135 transistor is related to how it is connected to a circuit. Using two terminals, the base and the collector, a voltage is applied to the transistor, which then amplifies the signal, depending on the amount of current applied. The amount of current flowing across the base-emitter junction determines how much control voltage is needed to control the current flow, as well as its gain.

The use of a BC817-16W,135 allows for the adjustment of current gain, by regulating the amount of base current in relation to the amount of collector current. An increase in the base current results in an increase of the collector current, thus increasing the current gain.

The base-emitter junction acts as a capacitor, allowing current to flow through at a certain rate, depending on the rate of change of the base current. The BC817-16W,135 also exhibits excellent frequency characteristics, with typical frequencies ranging from 100Hz - 1MHz.

In summary, the BC817-16W,135 is a great choice for applications that need a high frequency transistor with a low current draw. Its small form factor and versatility make it perfect for many signal switching applications, such as amplifying speech, controlling relays and toggling LEDs and light intensity.

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