LEM has introduced the LA 130-150 series of current transducers for use in motor drives, inverters, power supplies and general industrial applications. These printed-circuit board (PCB) mounted devices share a common, compact case outline, and are available to measure nominal full-scale currents of 130 and 150 ARMS.


The new series measures DC, AC, and pulsed currents, providing an output in the form of a current signal proportional to the measured (primary) current. Two conversion ranges – a factor of 1000 or 2000 – are offered, with two mounting styles; the transducers can be supplied with an open aperture through which the current carrying the primary current is routed or they can be supplied ready-fitted with a primary conductor that will connect direct to the host PCB. The transducers feature a maximum bandwidth of DC to 150 kHz (-1 dB point) and an accuracy of better than 0.5 % at the primary nominal RMS current and at ambient temperature. Typical linearity error is ±0.1 % at nominal current and the maximum offset temperature drift is ±0.46 % of nominal current from -40 to +85 ˚C. The Closed-Loop Hall-effect technology results in zero insertion losses and a fast response time of less than 500 ns.