2N3440 datasheet by STMicroelectronics

2N3440 Frequently Asked Questions (FAQs)

• What is the maximum operating temperature range for the 2N3440?
  The maximum operating temperature range for the 2N3440 is -55°C to 150°C.
• Can I use the 2N3440 as a switch?
  Yes, the 2N3440 can be used as a switch, but it's not recommended due to its relatively low current handling capability and high saturation voltage.
• How do I ensure the 2N3440 is fully turned on?
  To ensure the 2N3440 is fully turned on, apply a base current that is at least 1/10th of the collector current, and ensure the base-emitter voltage is at least 0.7V.
• What is the maximum collector current rating for the 2N3440?
  The maximum collector current rating for the 2N3440 is 500mA.
• Can I use the 2N3440 in a high-frequency application?
  The 2N3440 is not suitable for high-frequency applications due to its relatively low transition frequency (fT) of 150MHz.