W2F/W3F SMD Feedthru Capacitors KYOCERA AVX W2F/W3F SMD Feedthru Capacitors are ideal for EMI suppression, broadband I/O filtering, or VCC power line conditioning. KYOCERA AVX W2F/W3F filters feature a unique construction of a feedthrough capacitor to provide low parallel inductance and excellent decoupling capability. A large range of capacitor values is available in NP0 or X7R ceramic dielectrics.