Common Mode Chokes

The high level of integration of modern electronic circuits means that special attention must be paid to the observance of the required limit values for high-frequency interference signals. The sources of such interference are permanently high-frequency signals with frequency components greater than 10 kHz. These take the form, among others, of electric motors, TRIAC or thyristor circuitry, switching transistors and other potential high-frequency sources.

In order to deal with the great number of possible applications, PTR HARTMANN provides a wide range of common-mode chokes in accordance with DIN EN 60938-2.

• A very wide selection of common-mode chokes which are ideal for effective symmetrical interference suppression. All standard core materials are used which guarantee sufficient suppression even in the high frequency range.
• Common-mode chokes in compact designs on the basis of nano-crystalline toroidal cores. The advantage of such nano-crystalline cores lies in the wider attenuation range in which interference can be efficiently suppressed with mostly somewhat lower maximum attenuation.
• Common-mode chokes in a very wide range of designs and sizes which, if the customer requests, can also be supplied as three-phase. The connection options range from soldered connections to crimping, or in the case of moulded components to flexible connection leads directly from the housing / moulding.

All the materials used are UL-tested. On request, an assembly with our OBJY2 class B (130 °C) or class F (155 °C) UL insulation system is possible.
Core diameters of up to approx. 160.0 mm are possible for customer-specific solutions.