The HY 50-P/SP21 from LEM is a Current Transducer with AC Input Current -50 to 150 A, Output Current 0.01 A, Output Voltage +/- 4 V, Supply Voltage 5 to 15 V, Accuracy 0.01. Tags: PCB Mount, AC Current Transducer, DC Current Transducer. More details for HY 50-P/SP21 can be seen below.