The PMTAP-SPFI-SS-A from Micro-Optics is a Fiber Optic Isolator with Isolation 30dB to 37dB, Operating Temperature 0 to 70 Degree C, Optical Power 300 mW, Return Loss 50/50 dB, Storage Temperature -40 to 85 Degree C. More details for PMTAP-SPFI-SS-A can be seen below.