TDK introduces single-phase EMI filters for DIN rail and DC applications

     TDK Corporation has recently expanded its single-phase EMC filter portfolio with the introduction of the B84742A*R725 series of filters. Suitable for AC and DC applications with voltages up to 250V and rated currents from 6A to 30A, the new family of filters is ideal for DC infrastructure, which is increasingly prevalent in the industrial and construction sectors.

     The new series of single-phase filters are small in size at 97 x 60 x 34.5mm (L x W x H), weigh no more than 310 g, and are available in five different current sizes for quick installation on TH35 DIN rails (also known as "top hat rails"). The conductor is fixed by M4 screw, and the screw connection is protected by touch.

     In particular, the insertion loss of this series of filters is very high: depending on the model, the common-mode noise loss in the frequency range of 70 kHz to 10 MHz can reach more than 40 dB, and the differential mode noise loss exceeds 80 dB. At the same time, the leakage current is very low, less than 2 mA, which prevents accidental trip of the leakage protection device (RCD). All models of this family of filters are UL certified and are rated for operating temperatures up to 55°C.

     In addition, EMC filters can overload larger currents for a short period of time; It is allowed to run at 150% rated current for 3 minutes per hour, and can even run at 250% rated current for 30 seconds per hour. This superior overload capability is very useful when starting a motor for drive applications. Other typical applications for the new family of filters include power supplies and information and communication technologies.