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).