The CR4220 S-25 from CR Magnetics is a Current Transducer with AC Input Current 0 to 25 A, Output Current 0.004 to 0.02 A, Output Voltage 2500 V, Supply Voltage 24 V, Accuracy 0.005. Tags: DIN Rail Mount, Panel Mount, AC Current Transducer. More details for CR4220 S-25 can be seen below.