The HAT-800Q4/A1 from Yuanxing Electronics is a Current Transducer with AC Input Current 800 to 960 A, Output Current 0.004 to 0.02 A, Supply Voltage -12 to 12 V, Accuracy 0.01, Frequency 0.4 kHz. Tags: Panel Mount, AC Current Transducer. More details for HAT-800Q4/A1 can be seen below.