The LEM Current Transducer HTFS Series PCB 200A -300A to 300A 1 % Voltage Output 5 Vdc M3 is a Current Transducer for the electronic measurement of DC, AC, pulsed, mixed with galvanic isolation between the primary circuit (high power) and the secondary circuit (electronic circuit). Hall effect measuring principle. Low power consumption. The isolated plastic case is recognized according to UL94V-0. High immunity to external interference.