Powerex manufactures a wide range of disc and stud discrete thyristors/Silicon Controlled Rectifiers (SCRs).

LEM's ITZ 600-24000 Rack mounted (fix gain or programmable) current transducers. Made for ultra high accuracy. MAIN CHARACTERISTICS: 14 models, DC&AC isolated nominal current measurement: from 40 to 24000 ADC, Excellent linearity, from 1 to 10 ppm, High resolution, Initial offset: < 2 ppm, Very low offset drift: from 0.1 to 0.6 ppm/K, Overall accuracy @ IPN @ +25°C: between < +/- 3 ppm and < 12 ppm and Wide frequency bandwidth from DC up to 500 kHz (+/- 3 dB)