The DK 20 C420 B from LEM is a Current Transducer with DC Input Current 5 to 20 A, Output Current 0.004 to 0.02 A, Supply Voltage 20 to 50 V, Accuracy 0.01, Temperature Operating Range -20 to 50 Degree C. Tags: Panel Mount, DIN Rail, DC Current Transducer. More details for DK 20 C420 B can be seen below.