The HPI-83-A-N-B-1 P-grade from HJ Optronics, Inc. is a Fiber Optic Isolator with Insertion Loss 1.6 to 1.8 dB, Isolation 20 dB, Operating Temperature -5 to 40 Degree C, Optical Power 500 mW, Polarization Dependent Loss 0.2 dB. More details for HPI-83-A-N-B-1 P-grade can be seen below.