Nexperia USA Inc.
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BC857W,135
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BC857W,135

Product Overview

Category: Transistor
Use: Amplification and switching in electronic circuits
Characteristics: Small signal PNP transistor, high current gain, low voltage drop
Package: SOT323 (SC-70)
Essence: Reliable and efficient small signal amplification
Packaging/Quantity: Tape and reel, 3000 units per reel

Specifications

  • Collector-Base Voltage (VCBO): -45V
  • Collector-Emitter Voltage (VCEO): -45V
  • Emitter-Base Voltage (VEBO): -5V
  • Collector Current (IC): -100mA
  • Total Power Dissipation: 250mW
  • Transition Frequency (fT): 100MHz

Detailed Pin Configuration

  1. Emitter (E)
  2. Base (B)
  3. Collector (C)

Functional Features

  • High current gain (hFE) of 200 to 450
  • Low saturation voltage of 0.1V at 10mA
  • Fast switching speed for efficient performance in electronic circuits

Advantages and Disadvantages

Advantages: - Small and compact package - High current gain for effective signal amplification - Low voltage drop for energy-efficient operation

Disadvantages: - Limited maximum collector current compared to other transistors - Sensitive to overvoltage conditions

Working Principles

BC857W,135 is a small signal PNP transistor that operates by controlling the flow of current between its collector and emitter terminals. When a small current is applied to the base terminal, it allows a larger current to flow from the collector to the emitter, enabling amplification and switching functions in electronic circuits.

Detailed Application Field Plans

  1. Audio Amplification: BC857W,135 can be used in audio amplifier circuits to amplify weak signals from microphones or musical instruments.
  2. Signal Switching: It can be employed in signal switching applications where precise control of signal flow is required, such as in communication systems.
  3. Sensor Interfaces: The transistor can be utilized in sensor interface circuits to amplify and process sensor signals for further processing.

Detailed and Complete Alternative Models

  1. BC857B,215
  2. BC857C,215
  3. BC857S,235
  4. BC857BW,115

In conclusion, BC857W,135 is a versatile small signal PNP transistor with high current gain and low voltage drop, making it suitable for various amplification and switching applications in electronic circuits.

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Énumérez 10 questions et réponses courantes liées à l'application de BC857W,135 dans les solutions techniques

  1. What is the BC857W,135 transistor used for?

    • The BC857W,135 is a general-purpose PNP transistor commonly used for amplification and switching applications in electronic circuits.

  2. What are the typical operating conditions for the BC857W,135?

    • The BC857W,135 transistor typically operates at a maximum collector current of 100mA and a maximum collector-emitter voltage of 45V.

  3. Can the BC857W,135 be used for audio amplification?

    • Yes, the BC857W,135 can be used for small signal audio amplification due to its low noise and high gain characteristics.

  4. What are some common circuit configurations using the BC857W,135?

    • Common circuit configurations include common emitter, common base, and emitter follower configurations for various amplification and switching purposes.

  5. Is the BC857W,135 suitable for low-power switching applications?

    • Yes, the BC857W,135 is suitable for low-power switching applications due to its moderate current and voltage ratings.

  6. What are the thermal considerations for the BC857W,135?

    • The BC857W,135 has a maximum junction temperature of 150°C, so thermal management is important to ensure reliable operation.

  7. Can the BC857W,135 be used in high-frequency applications?

    • While it is not specifically designed for high-frequency applications, the BC857W,135 can still be used in moderate frequency applications due to its transition frequency characteristics.

  8. Are there any specific precautions to consider when using the BC857W,135 in a circuit?

    • It's important to ensure proper biasing and avoid exceeding the maximum ratings to prevent damage to the transistor.

  9. What are the alternatives to the BC857W,135 if it's not available?

    • Alternatives include similar PNP transistors such as BC807, 2N3906, or 2N4403, depending on the specific requirements of the circuit.

  10. Where can I find detailed technical specifications and application notes for the BC857W,135?

    • Detailed technical specifications and application notes for the BC857W,135 can be found in the datasheet provided by the manufacturer or on their official website.