S1227-33BR Silicon photodiode by Hamamatsu. Package: 2-pin , 6 x 7.6mm quartz windowed Photosensitive area 2.4 x 2.4mm Response range 190~ 1000 nm Special features: suppressed IR sensitivity for use in optical measuremnt equipment. Download Hamamatsu S1227-33BR .pdf datasheet: Status: NOS (New Old Stock) from original packaging RoHS compliant: TBC.