The CR4170 - 25 from CR Magnetics is a Current Transducer with AC Input Current 0 to 25 A, Output Current 0.004 to 0.02 A, Supply Voltage 24 V, Accuracy 0.005, Frequency 0.02 to 5 kHz. Tags: DIN Rail Mount, Panel Mount, AC Current Transducer. More details for CR4170 - 25 can be seen below.