The maximum operating temperature range for the BC847T,115 is -40°C to 150°C.
Yes, the BC847T,115 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)). It's better suited for amplifier applications.
To ensure proper biasing, you should provide a stable voltage supply, use a suitable resistor network to set the base voltage, and ensure the collector current is within the recommended range (IC = 100 mA).
The maximum collector-emitter voltage (VCE) that the BC847T,115 can handle is 45 V.
The BC847T,115 is not suitable for high-frequency applications due to its relatively low transition frequency (fT) of 100 MHz. For high-frequency applications, consider using a transistor with a higher fT.