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Transistor B557 - Pack of 10

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Transistor Polarity PNP
Collector-Base Voltage (VCBO) 50V
Collector-Emitter Voltage (VCEO) 45V
Emitter-Base Voltage (VEBO) 5V

BC557 PNP General Purpose Transistor 45V

Transistor B557 - Pack of 10:

The BC557 is a commonly used PNP bipolar junction transistor (BJT) with general-purpose applications. Here are some key specifications for the BC557 PNP transistor:

Type: PNP (Positive-Negative-Positive) transistor.
Package: TO-92, which is a standard small plastic package for transistors.
Polarity: The collector is typically connected to the positive supply voltage, the base is used to control the current flow between the collector and emitter, and the emitter is connected to the ground or common reference.
Maximum Collector-Base Voltage (VCB): Typically 50V.
Maximum Collector-Emitter Voltage (VCE): Typically 45V.
Maximum Emitter-Base Voltage (VEB): Typically 5V.
Maximum Collector Current (IC): Around 100mA.
Maximum Power Dissipation (Ptot): Around 625mW.
Gain (hfe or β): The forward current transfer ratio is typically between 110 and 800, depending on the specific transistor.

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The BC557 is often used in low-power amplification, switching, and general-purpose electronic circuits. It is complementary to the NPN transistor BC547, and together they can be used in various complementary push-pull amplifier configurations.

When using the BC557 in a circuit, ensure proper biasing and refer to the datasheet for detailed information on its characteristics, electrical parameters, safe operating conditions, and typical applications.