The LF 310-S from LEM is a Current Transducer with AC Input Current 300 A, DC Input Current -500 to 500 A, Output Current -0.033 to 0.038 A, Supply Voltage - 11.4 to 21 V, Accuracy 0.002. Tags: Panel Mount, AC Current Transducer, DC Current Transducer. More details for LF 310-S can be seen below.