EMI/RFI Suppressors are electronic components designed to reduce unwanted electromagnetic interference (EMI) and radio-frequency interference (RFI) generated by or entering electronic circuits and equipment. They help suppress high-frequency electrical noise, unwanted transients, and interference that can affect signal integrity, device performance, and electromagnetic compatibility (EMC).

Available in a variety of circuit configurations, filtering characteristics, voltage and current ratings, and package styles, EMI/RFI suppressors can be integrated into power, signal, and communication lines. They are commonly used in power supplies, computers, telecommunications equipment, industrial controls, automotive electronics, consumer devices, and other electronic systems where reliable noise suppression and interference control are essential.