BC857W,135

Series:	Automotive, AEC-Q101
Packaging:	Tape & Reel (TR)
Part Status:	Active
Transistor Type:	PNP
Current - Collector (Ic) (Max):	100mA
Voltage - Collector Emitter Breakdown (Max):	45V
Vce Saturation (Max) @ Ib, Ic:	600mV @ 5mA, 100mA
Current - Collector Cutoff (Max):	15nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce:	125 @ 2mA, 5V
Power - Max:	200mW
Frequency - Transition:	100MHz
Operating Temperature:	150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	SC-70, SOT-323
Supplier Device Package:	SOT-323-3
Base Part Number:	BC857

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Transistors - Bipolar (BJT) - Single

The BC857W,135 is a 45V single small signal NPN transistor designed for general purpose switching and amplification applications. This type of transistor is extremely common and is useful in a vast range of applications. The BC857W,135 transistor is made of a semiconductor material with some type of doping on zones of the material to control the movement of electrons. This kind of transistor is also known as a Bipolar Junction Transistor (BJT). There are three leads of this transistor, namely the collector, the base and the emitter. The collector of the transistor is the pin that comes into direct contact with the metal frame of the transistor package. Its role is to collect and transfer electrons from the emitter and base which serves as a bridge between the collector and emitter. The base of the transistor is the pin that also connects to the metal frame. This is the controlling pin and its voltage controls the movement of electrons that pass between the collector and emitter. The emitter is connected to the metal frame of the package via a wire connected to the lower pin of the transistor. Its role is to push electrons into the collector. The operating principle of the BC857W,135 transistor relies on the base current flow. When current flows out of the base it creates a potential difference between the collector and emitter that switches the transistor from its ‘Off’ or non-conductive state to its ‘On’ or conductive state. This voltage difference between the collector and emitter is known as the transistor’s ‘Base Emitter Voltage’. The BC857W,135 transistor can be used for general switching and amplification applications such as amplifying audio signals. It is also used to construct logic buffers, voltage- controlled switches and other applications where low power is required such as in the negative voltage regulation circuit, a DC-DC converter circuit, or in data-acquisition systems. The BC857W,135 transistor is an incredibly versatile component that can be used in an array of different applications. Due to its low power consumption, relatively small size and low cost, it is one of the most frequently used transistor types available.

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