The JGS4-1 from Sensor Electronic Technology is a Current Transducer with AC Input Current 0 to 500 A, Supply Voltage 5 to 48 V, Accuracy 0.50%, Frequency 1 to 20 kHz, Temperature Operating Range -20 to 60 Degree C. Tags: Panel Mount, AC Current Transducer. More details for JGS4-1 can be seen below.