The OLH1249 is designed especially for high-reliability
applications that require optical isolation in radiation
environments such as gamma, neutron, and proton radiation with
high CTR and low saturation VCE. The OLH1249 consists of an LED
and
N-P-N silicon phototransistor mounted and coupled in an 8-pin
hermetically sealed DIP package. Electrical parameters are similar
to the OLH1049 and 4N49, but have much better CTR degradation
characteristics due to radiation exposure.
High-reliability screening and special CTR selections are available
(contact Isolink for more information).