BPW34 PIN photodiode,DIP,120deg. This family of IR photodiodes, from OSRAM Opto Semiconductors, are from the BPW 34 series. They come in surface mount (SMD) or through-hole DIL plastic packages with a radiant sensitive area of 2.65 x 2.65 mm². They BPW 34 IR photodiodes are designed for applications with wavelength range of up to 1100 nm.