Features
(1)Fast response time
(2)High photo sensitivity
(3)Small junction capacitance
(4)Compatible with infrared and vapor phase reflow solder process.
(5)Pb free
(6)The product itself will remain within RoHS compliant version.
Descriptions
PT91-21B/TR10 is a phototransistor in miniature SMD package which is molded in black plastic with spherical top view lens. The device is spectrally matched to infrared emitting diode.

Applications
(1)Miniature switch
(2)Counters and sorter
(3)Position sensor
(4)Infrared applied system

Precautions For Use 

 Each terminal is to go to the tip of soldering iron temperature less than 280℃ for 3 seconds within once in less than the soldering iron capacity 25W. Leave two seconds and more intervals, and do soldering of each terminal. Be careful because the damage of the product is often started at the time of the hand solder. 5.Repairing         Repair should not be done after the LEDs have been soldered. When repairing is unavoidable, a double-head soldering iron should be used (as below figure). It should be confirmed beforehand whether the characteristics of the LEDs will or will not be damaged by repairing.