The CTSR 0.3-TP/SP4 from LEM is a Current Transducer with AC Input Current 300 A, DC Input Current -500 to 500 A, Output Current 0.0175 to 0.0216 A, Output Voltage 0.7 to 1.7 V, Supply Voltage 4.75 to 5.25 V. Tags: PCB Mount, AC Current Transducer, DC Current Transducer. More details for CTSR 0.3-TP/SP4 can be seen below.