Common mode chokes for single- and 3-phase applications

24th May 2016
Posted By : Joe Bush
Common mode chokes for single- and 3-phase applications

The range of current compensated chokes from Schurter has been expanded with high current types for PCB mounting. The new DKIH series is now available with a nanocrystalline ring core, offering eight times higher inductance performance than ferrite core versions in the same compact dimension.

The new product is designed for single- and 3-phase applications with rated currents from 10 to 50A. Due to its open design, the chokes are light weight and compact, well suited to suppress EMI noise caused by power applications on the PCB.

Like all other aspects of electronic design, the power portion is often times built using discrete components on PCBs. With the trending integration of components, to achieve smaller and smaller form factors, thermal problems and high currents on the PCB can become a challenge. Traditional block filters might well address these challenges, but their larger package size also presents challenges due to the mentioned space constraints. Therefore, an asymmetrical effective common mode choke and capacitors mounted on the PCB is a better solution.

The new DKIH-1 series is suitable for single-phase AC or DC applications from 10-50A. 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 to IEC 60938, UL 1283 and CSA 22.2 no. 8. The voltage rating is 300V AC (IEC, UL) and 250V AC (CSA) with an inductance range of 1.6 to 6.9mH.

The new DKIH-3 series is suitable for 3-phase AC applications from 10-50A. The common mode chokes are also designed according to IEC 60938 and are rated 600V AC with an inductance range of 0.7 to 10.8mH, making them suitable for a variety of applications such as UPS systems, switching power supplies, charge stations for electric vehicles and frequency converters for energy storage.

The DKIH-1 and -3 have a wide temperature range of -40 to 100°C and are available with a standard pin out or customer specific pin out. Variations in the winding are also available upon request.

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