The AK 50 C420L from LEM is a Current Transducer with AC Input Current 10 to 50 A, Supply Voltage -24 to 24 V, Accuracy 0.01, Frequency 0.02 to 0.1 kHz, Temperature Operating Range -20 to 50 Degree C. Tags: Panel Mount, DIN Rail Mount, AC Current Transducer. More details for AK 50 C420L can be seen below.