Instructions for Use:

1. Handling:

   • Handle the 903FP with care to avoid damage to the leads and housing.
   • Avoid exposure to excessive static electricity.

2. Mounting:

   • Solder the leads to the PCB using a temperature-controlled soldering iron.
   • Ensure that the soldering temperature does not exceed 260°C for more than 10 seconds.
   • Allow the device to cool naturally after soldering.

3. Electrical Connections:

   • Connect the collector (C) to the positive supply.
   • Connect the emitter (E) to the ground.
   • The base (B) is typically left unconnected unless specific biasing is required.

4. Operation:

   • Ensure the operating voltage (VCE) does not exceed 5 V to prevent damage.
   • The device is sensitive to infrared light; ensure it is used in environments where it will not be exposed to excessive ambient light.

5. Storage:

   • Store the device in a dry, cool place within the specified storage temperature range.
   • Keep the device away from direct sunlight and sources of heat.

6. Testing:

   • Use a multimeter to test the continuity between the collector and emitter when the phototransistor is illuminated.
   • The resistance should drop significantly when the phototransistor is exposed to light.

7. Troubleshooting:

   • If the device does not respond to light, check the connections and ensure the correct voltage is applied.
   • If the device is damaged or non-functional, replace it with a new one.

By following these guidelines, you can ensure optimal performance and longevity of the 903FP phototransistor.