BC557 DATASHEET PDF

The maximum amount of current that could flow through the Collector pin is mA, hence we cannot connect loads that consume more than mA using this transistor. To bias a transistor we have to supply current to base pin, this current IB should be limited to 5mA. When this transistor is fully biased then it can allow a maximum of mA to flow across the collector and emitter. When base current is removed the transistor becomes fully off, this stage is called as the Cut-off Region and the Base Emitter voltage could be around mV. BC Transistor as switch When a transistor is used as a switch it is operated in the Saturation and Cut-Off Region as explained above.

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Please enter a valid Pincode. To bias a transistor we have to supply current to base pin, this current I B should be limited to 5mA. TL — Programmable Dtasheet Voltage. It can amplify power, voltage and current at different hc BC is a general purpose NPN transistor which should be considered for use in design circuits requ. The value of I B should not exceed mA.

When base current is removed the transistor becomes fully off, this stage is called as the Cut-off Region and the Base Emitter voltage could be around mV. When this transistor is fully biased then it can allow a maximum of mA to flow across the collector and emitter.

As discussed a transistor will act as an Open switch during Forward Bias and as a Closed switch during Reverse Bias, this biasing can be achieved by supplying the required amount of current to the base pin. When datwsheet transistor is used as a switch it is operated in the Saturation and Cut-Off Region as explained above.

As mentioned the biasing current should maximum of 5mA. Current flows in through collector. Of the above types common emitter type is the popular and mostly used configuration. The value of this resistor R B can be calculated using below formulae. The device consists o. If you are designing a PCD or Perf datadheet with this component then the following picture from the BC Datasheet will be useful to know its package type and dimensions. When uses as an Amplifier the DC current gain of the Transistor can be calculated by using the below formulae.

Features Description Documentation Reviews 0. Amplifier modules like Audio amplifiers, signal Amplifier etc. The device is available in a TO package. Anything more than 5mA will kill the Transistor; hence a resistor is always added in series with base pin. BC has a gain value of tothis value determines the amplification capacity of the transistor. BC is a PNP Transistor in SOT23 plastic package that should be considered for use in design circuits requiring general purpose switching and amplification.

Current Drains out through emitter. The maximum amount of current that could flow through the Collector pin is mA, hence we cannot connect loads that consume more than mA using this transistor. Controls the biasing of transistor. Detailed datasheet for the device can be downloaded from the Documents section. Electrically isolates transistor or other components from the heat-sink to make thermal conduction b. BC is a PNP transistor hence the collector and emitter will be closed Forward biased when the base pin is held at ground and will be opened Reverse biased when a signal is provided to base pin.

TO Thermal Conduction Transistor Silicone Insulation Pad Electrically isolates transistor or other components from the heat-sink to make thermal conduction b. HTML is not translated!

BFR91 should be considered to be used primarily dtaasheet design of high-gain, low noise, small-signal amp. Some of the configurations used in amplifier circuits are Common emitter amplifier Common collector amplifier Common base amplifier Of the above types common emitter type is the popular and mostly used configuration.

The combo comprises of TO package heat sink, thermal conductive silicon insulation pad, nut, ins. Most 10 Related.

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