Radiation-Tolerant, Phototransistor Surface-Mount Optocoupler

The OLC049 can be used for large satellite constellation applications that require optical isolation in radiation environments such as gamma, neutron, and proton radiation with a high Current Transfer Ratio (CTR) and low saturation VCE. Each optocoupler consists of an LED and N-P-N silicon phototransistor that is electrically isolated, but optically coupled inside a non-hermetic, four-pin Leadless Chip Carrier (LCC) package.

The hermetic surface-mount variant of the OLC049 optocoupler is available as the OLS049, both in a non-screened catalog version as well as a high-reliability screened version.


    • Miniature non-hermetic surface-mount package
    • Radiation tolerant
    • High CTR guaranteed over –55 °C to +125 °C ambient temperature range
    • 1000 VDC electrical isolation

Images Diagrams


    • Memo
    • Condition
    • CTR @ IF = 1 mA
    • CTR Min.
    • 200
    • CTR Max.
    • 1200
    • BVCEO (V)
    • 60
    • Vcc Max. (V)
    • Switching Time (μs)
    • 25
    • Isolation @ VDC 1 Sec.
    • 1000
    • Package Photo
    • Package Info
    • 4-Lead Non Hermetic LCC
    • Radiation Tolerant
    • Yes
    • No Base Connection
    • Yes