BC858W,135

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BC858W,135 Application Field and Working Principle

The BC858W,135 is a NPN Transistor (Single Bipolar) that is popularly used in small scale circuits. This device is well-suited for low frequency and medium current applications. It operates in frequencies ranging from 20kHz to 100kHz, while its current ratings range from 0.5A to 1A. This device also offers good switching times and wide DC current gain range supporting various applications.

Features

• Two possible configurations - Surface Mount (BC858W) and Through Hole (BC858T).
• Frequency Range: 20KHz - 100KHz.
• Wide current gain range.
• High switching time.
• Good collector current.
• Very low DC voltage drop.

Applications

• Low frequency amplifiers.
• Modems.
• Voltage regulation.
• DC/DC converters.
• Mobile communications.
• Data interface circuits.
• Motor drivers.
• Power supply.

Working Principle

The BC858W,135 is a NPN Transistor, a type of Bipolar Junction Transistor. It consists of three layers; the emitter, base, and collector. Electrical energy is supplied to the device in three ways. It could be supplied to the base, the emitter, or the collector. When electrical energy is supplied to the base, it is transferred to the emitter-collector junction. The transfer of electrons is the result of the base voltage or current. This, in turn, allows current to flow between the emitter and collector. The movement of electrons is responsible for providing amplification to the device. The gain of the device is directly proportional to the base current and base-emitter voltage.

Conclusion

The BC858W,135 NPN Transistor is a single bipolar junction transistor. It offers good switching times, wide DC current gain range, and wide frequency range. It is well suited for applications such as low frequency amplifiers, modems, voltage regulation, mobile communications, and motor drivers. It operates by transferring electrons from the base to the emitter collector junction when electrical energy is supplied to the base. The gain of the device is directly proportional to the base current and base-emitter voltage.

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