New Industry Products

Kyocera Launches New Quad EMI Filter Array with ESD Protection

July 02, 2007 by Jeff Shepard

Kyocera Corp. introduced the KVA21 quad EMI filter array, a compact, RoHS compliant, distributed constant type component featuring both electromagnetic interference (EMI) filtering and electrostatic discharge (ESD) protection in a single package. The new units, measuring only 2.0 x 1.25 x 0.7 mm (typ.), are available in sample quantities in July, and go to volume production in August.

The KVA21 series features Kyocera’s new varistor material, replacing the dielectric ceramic used in previous KNA series filters. The varistor has been optimized using advanced electromagnetic simulation to combine ESD protection with EMI filtering, which is said to offer the same high level of filtering performance as before and smaller package size for integration on the circuit board.

Kyocera and affiliate AVX developed the EMI filters with the varistor function based on AVX advanced material technology. Circuits with the new material were designed with advanced electromagnetic field simulation, optimizing the L (inductors) and C (capacitors) layout on the filter array. The result is an 8kV ESD contact discharge – in accordance with IEC/EN 61000-4-2.

The KVA21 series also offers attenuation characteristics exceeding 30dB over the wide and on the high-frequency band by distributed-constant LC filter (even with the added function of ESD protection, over the 800MHz to 2.0 GHz band with minimal insertion loss equivalent to the conventional products).