BC858W,135 datasheet by NXP Semiconductors

BC858W,135 Frequently Asked Questions (FAQs)

• What is the recommended operating voltage range for the BC858W,135?
  The recommended operating voltage range for the BC858W,135 is 2.7V to 5.5V, although it can tolerate a maximum voltage of 6V for short periods.
• How do I ensure the BC858W,135 is properly biased for optimal performance?
  To ensure proper biasing, connect the base of the transistor to a voltage divider network that sets the base voltage to around 0.7V to 1V above the emitter voltage. This will provide a stable operating point.
• What is the maximum current handling capacity of the BC858W,135?
  The BC858W,135 can handle a maximum collector current of 100mA and a maximum collector-emitter voltage of 50V. However, it's essential to ensure the device operates within the safe operating area (SOA) to prevent overheating and damage.
• How do I choose the correct resistor values for the base and collector circuits?
  Choose resistor values that provide a stable operating point and ensure the transistor is not over-driven. A general rule of thumb is to use a base resistor value between 1kΩ to 10kΩ and a collector resistor value between 100Ω to 1kΩ, depending on the specific application and required current levels.
• Is the BC858W,135 suitable for high-frequency applications?
  The BC858W,135 is a general-purpose transistor and not optimized for high-frequency applications. It has a transition frequency (fT) of around 100MHz, making it more suitable for low-to-medium frequency applications such as audio amplifiers, switches, and linear regulators.