PCB-mount common mode chokes for 1- and 3-phase applications

November 24, 2015 // By Graham Prophet
Schurter has added high current types for PCB mounting to its range of current-compensated chokes with. The DKIH series is available for single and three phase applications with rated currents from 10 to 50A. With open design, the chokes are light weight and compact, and suppress EMI noise from power circuits.

With smaller form factors, thermal problems and high currents on can arise the PCB. 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 a good solution. Capacitors and a common mode choke, with asymmetrical effective inductance, are very effective to dampen EMI noise. The DKIH-1 series is suitable for single phase AC or DC applications from 10 up to 50A. The chokes are 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) and have rated inductance from 0.15 to 0.80 mH. The new DKIH-3 series is suitable for three phase AC applications from 10 up to 50A. The common mode chokes are also designed according IEC 60938 and are rated 600 VAC, with rated inductance from 0.08 to 1.10 mH. Both series have a temperature range of -40 to +100°C. They are available with a standard pin out or customer specific pin out. Variations in the winding are also available on request.

Use them in frequency converters for photovoltaic or energy storage, charging stations for electric vehicles, UPS-systems, and general applications in switching power supplies.

Schurter; www.schurter.com and http://dkih.schurter.com/