EMIS, the global electromagnetic compliance specialist, has expanded its range of FeedThrough components designed to improve high-frequency noise suppression and boost system-level EMC performance across industrial, power, communications, defence, and avionics sectors.
FeedThrough capacitors allow a signal or power conductor to pass through a grounded metal barrier while diverting unwanted high-frequency interference to ground. Unlike standard two-lead capacitors, the single-piece construction offers a low-impedance path to ground, improving insertion loss in the kilohertz to gigahertz range, subject to installation and device design. The components are widely used to prevent radio frequency interference entering or leaving shielded enclosures.
The capacitors are threaded for secure bulkhead mounting, ensuring a durable mechanical connection and stable ground reference, which is essential for suppression performance. Typical ratings extend to about 200 A and 250 VAC, with capacitance values from roughly 2.2 nF to 4700 nF. Devices meet IEC/EN 60384 14 safety requirements, and versions are available that satisfy Y2 capacitor classifications and specific surge or pulse tests.
EMIS also offers FeedThrough filters, which integrate capacitors, inductors, and in some designs resistors, to deliver broadband attenuation of conducted noise. These filters provide higher insertion loss across a wider frequency spectrum, including at lower frequencies where line impedance becomes significant. Electrical ratings generally reach 200 A and 250 VAC, with compliance to UL 60939 3, IEC 60939 1 and 2, and CSA C22.2 No. 8.
Applications span RF and communication systems, power conversion, UPS equipment, aerospace and military electronics, high-speed digital controls, robotics, medical devices, and shielded environments requiring stringent EMC compliance. Sealed variants support outdoor and harsh-environment use, maintaining both environmental and EMC integrity.
EMIS positions its FeedThrough technologies as part of an end-to-end approach to managing EMI challenges. The company, which operates across eight industry segments, supports customers with a consulting team, a pre-compliance laboratory, and a catalogue of more than 2,500 certified standard products manufactured in-house.
