The PMTI-S-4-5-7 from COMCORE Technologies is a Fiber Optic Isolator with Isolation 30 dB, Operating Temperature -5 to 70 Degree C, Optical Power 300 mW, Return Loss 50 dB, Storage Temperature -40 to 85 Degree C. More details for PMTI-S-4-5-7 can be seen below.