The OLS303 is suitable for wide bandwidth analog applications. Each OLS303 has an LED and integrated photodiode transistor detector mounted and coupled in a custom hermetic surface mount Leadless Chip Carrier (LCC) ceramic package, that provides 1500 VDC of electrical isolation between the input and output. The integrated photodiode transistor improves the bandwidth by orders of magnitude as compared to standard phototransistors. The internal shield provides excellent commonmode immunity performance. Device mounting is achieved with reflow soldering or conductive epoxies.