Coupling/Decoupling Network CDN-M425E is with a four conductor power cable. This standard M series CDN has a current rating of 25 Amps. These CDNs cover the frequency range of 150 kHz - 230 MHz. This CDN is recommenced for all power supplies connections. For immunity testing the noisy signals are coupled to each conductor in the supply lines according to EN 61000-4-6 standard.