![]() ![]() Unlike MOSFETs, transistors are current controlled devices, means they can be turned on or off by supplying required base current (for BC180 transistor it is 2mA). When a positive voltage is applied to the base, holes are created to the base, so they start migrating to the emitter junction, this process thins out the depletion region from the PN junction and more and more electrons start flowing and are collected by the collector. In an NPN transistor, electrons work as the primary charge carriers and are emitted from the emitter of the transistor to the PN junction. Depending upon the construction, transistors are divided into two categories - NPN transistor and PNP transistor as shown below. The BC108 Transistor is a general-purpose N-P-N transistor, A junction transistor is simply a sandwiched construction between two layers of N-type material or P-type material. Note: Complete technical information can be found in the BC108 Datasheet, linked at the bottom of this page.īC547, BC548, BC549, 2n3904, BC107, 2N2222, 2N3053, 2N2907, BC177B Operating and Storage Junction Temperature Range -65 to +175 ☌.Operating Junction Temperature Max (Tj): 175 ☌.Maximum Collector-Base Voltage |Vcb|: 30 V’.Continuous Collector current (IC) is 200mA.As you already may know, a transistor is a current controlled device so when the base current is removed, the transistor becomes fully off, in this stage the transistor is working in its Cut-off Region and the Base Emitter voltage could be around 660mV.Įlectrons emitted from the emitter into the first PN junctionĮlectrons Emitted from Emitter Collected by the Collector When this transistor is in biased condition, then it can allow a maximum current of 200mA across CE(Collector Emitter) Junction, this state of the transistor is called the saturation state and driving a load that consumes more current than 200mA may damage the device in this condition. This transistor has a collector-emitter voltage of 30V and a collector base voltage of 5V. The maximum collector current of this transistor is rated at 200mA with a maximum emitter-base voltage of 5V. ![]() The gain value can differ depending upon the manufacturer, so it's highly recommended to check out the datasheet of the specific device before you do the calculation. To use this transistor as an amplifier, you need to get the gain value from the datasheet of the device. The BC108 is an NPN Transistor, hence we need to provide a small amount of positive voltage to the base of the transistor and then only the required amount of current flows through the base of the transistor. BC108 is a generic semiconductor device that can be used to amplify or switch signals or power. ![]()
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