Data Sheet
1.9mm Round Subminiature Gull wing” Lead Photortransistor
PT91-21C/TR7
Copyright © 2013, Everlight All Rights Reserved. Release Date : 25-July-2016. Issue No:DPT-0000295. Rev:5
Precautions For Use
1. Over-current-proof
Customer must apply resistors for protection , otherwise slight voltage shift will cause big
current change ( Burn out will happen ).
2. Storage
2.1 Do not open moisture proof bag before the products are ready to use.
2.2 Before opening the package, the Phototransistor should be kept at 30℃ or less and 90%RH or less.
2.3 The Phototransistor should be used within a year.
2.4 After opening the package, the Phototransistor should be kept at 30℃ or less and 70%RH or less.
2.5 The Phototransistor should be used within 168 hours (7 days) after opening the package.
2.6 If the moisture absorbent material (silica gel) has faded away or the Phototransistor have exceeded the
storage time, baking treatment should be performed using the following conditions.
Baking treatment : 60±5℃ for 24 hours.
3. Soldering Condition
3.1 Pb-free solder temperature profile
3.2 Reflow soldering should not be done more than two times.
3.3 When soldering, do not put stress on the Phototransistor during heating.
3.4 After soldering, do not warp the circuit board.
