Current-compensated common-mode chokes for single and three-phase applications

Schurter has expanded its wide range of current-compensated chokes with high-current PCB mounting types. The new DKIH series are available for single and three-phase applications with rated currents from 10A to 50A. Due to their open design, the chokes are light weight and compact, ideal for the suppression of EMI noise caused by power applications on the PCB. Like all other aspects of electronic design, the power portion is often built using discrete components on printed circuit boards. With the trending integration of components, to achieve smaller and smaller form factors, thermal problems and high currents on the PCB can arise. It also becomes increasingly challenging to meet EMC requirements with a filter package due to the resulting space constraints; therefore a filter on PCB with discrete components is an attractive solution. Also, the capacitors and a common-mode choke, with asymmetrical effective inductance, are particularly effective in dampening EMI noise. The new DKIH-1 series is suitable for single phase AC or DC applications from 10A up to 50A. Light weight and compact, the common -mode chokes are easily placed on the PCB with through hole technology (THT). They are designed and approved according IEC 60938, UL 1283 and CSA 22.2 no. 8. The voltage rating is 300 VAC (IEC, UL) and 250 VAC (CSA). The new DKIH-3 series is suitable for three phase AC applications from 10 up to 50 amperes. The common mode chokes are also designed according IEC 60938 and are rated 600 VAC, making them suitable for many applications. The DKIH-1 and -3 have a wide temperature range of -40C to +100C. They are available with a standard pin out or customer specific pin out. Variations in the winding are also available on request, says the company.