the phototransistor is a high speed and high sensitive npn silicon phototransistor molded in a standard package. the package is an ir filter spectrally mathch to ir emitters. part number as: pd70-01b/tr7,pd70-01c/tr7, pd70-01b/tr10,pd70-01c/tr10,pt204-6b, pt204-6c,pt28-21b/tr8,pd204-6c/l3, pd204-6b, pd438b,pd438b/l1, pd438b/s46,pd438c,pd638b,pd638c, pd333-3c/h0/l2,,pd334-6b,pd333-3b/l3, pt91-21b,pt91-21b/tr7, pt91-21b/tr10, pt11-21c/l41/tr8,pt15-21c/ tr8,pt15-21b/tr8,pt17-21c/tr8,pt26-21b/tr8, pt67-21b/c14/tr8,pt67-21c/l41/tr8,pd15-22c/tr8,pd93-21c/tr8,pt908-7c,pt958-8c,pt928-6c,pt928-6b,pt5529b/l2,pt5529b/l2/h2,pt5529b/l2/s3,pt5529b/l2/h3.etc。 

applications:optoelectronic switch\vcrs\vidio\camera\floppy disk drive\infrared applied system