The HDT-20C/A0 from Yuanxing Electronics is a Current Transducer with DC Input Current 20 to 24 A, Output Current 0 to 0.02 A, Supply Voltage -12 to 12 V, Accuracy 0.005, Temperature Operating Range -25 to 85 Degree C. Tags: Panel Mount, DC Current Transducer. More details for HDT-20C/A0 can be seen below.