BD139-10 datasheet by STMicroelectronics

BD139-10 Frequently Asked Questions (FAQs)

• What is the maximum operating temperature range for the BD139-10?
  The BD139-10 can operate safely between -55°C to 150°C, but the recommended operating temperature range is -40°C to 125°C for optimal performance.
• How do I ensure the BD139-10 is properly biased for linear operation?
  To ensure linear operation, the BD139-10 should be biased with a base-emitter voltage (VBE) between 0.6V to 0.8V, and a collector-emitter voltage (VCE) greater than 1V. Additionally, the base current should be limited to prevent overheating.
• What is the maximum collector current rating for the BD139-10?
  The maximum collector current rating for the BD139-10 is 1.5A, but it's recommended to derate the current to 1A or less for continuous operation to ensure reliability and prevent overheating.
• Can I use the BD139-10 as a switch?
  Yes, the BD139-10 can be used as a switch, but it's not recommended due to its relatively low current gain (hFE) and high saturation voltage (VCE(sat)). A dedicated switching transistor like the 2N3904 or 2N2222 would be a better choice.
• How do I protect the BD139-10 from electrostatic discharge (ESD)?
  To protect the BD139-10 from ESD, handle the device by the body or use an anti-static wrist strap, and store the device in an anti-static bag or container. Avoid touching the device's pins or leads with bare hands.