AVX adds 26-VDC varistors for automotive, instrument applications
Fountain Inn, SC. AVX, a manufacturer of passive components and interconnect solutions, has added new 26-VDC components to its dual-function TransFeed and TransFeed Automotive Series varistors, extending the series’ EMI/RFI filtering and bidirectional ESD protection capabilities to a broader range of applications, including automobiles, power supplies, computers, medical instruments, smartphones, multimedia add-on cards, barcode scanners, remote terminals, transceivers, and test equipment.
TransFeed and Transfeed Automotive Series multilayer varistors (MLVs) are transient-voltage suppression (TVS) devices that combine the most beneficial electrical characteristics of AVX’s TransGuard TVS devices with those of its feedthru capacitors in a unique 0805 single-chip solution that responds to transient events faster than any other TVS device available on today’s market (<0.2ns), provides state-of-the-art overvoltage circuit protection and EMI attenuation over a much broader range of frequencies than comparable devices, and delivers significant EMI attenuation when in the off-state.
“General purpose TransFeed and TransFeed Automotive Series varistors both provide outstanding bidirectional ESD protection coupled with low parallel inductance, excellent decoupling capabilities for high di/dt environments, and significant noise reduction in digital circuits, which makes them an ideal choice for systems designers with transient voltage and broadband EMI/RFI concerns,” said Jiri Machanicek, product manager at AVX. “Both series prove especially useful in fingerprint ID and magnetic field circuits, microcontroller and interface I/O lines, and power regulation and line conditioning applications, and the automotive series is also well-suited for use in drive-by-wire applications, dimming mirror circuits, and LCD dashboard drivers.”
TransFeed and TransFeed Automotive Series MLVs utilize a ZnO varistor material coupled with the electrode pattern of a feedthru capacitor to maximize the package advantage of the feedthru and the material advantages of the ZnO dielectric. This combination results in several electrical and physical advantages over standard ZnO MLVs, including reduced parallel inductance, increased series inductance, faster turn-on time (<250 ps), broadband EMI attenuation, multiple strike capabilities, and small size (relative to discrete MLV and EMI filter schemes). Measured response times for the two series range from 200 to 250 ps, which is less than half that of the fastest bipolar TVS solutions currently available, and both also exhibit excellent attenuation at high self-resonant frequency with a much flatter roll-off characteristic than comparable devices, resulting in EMI filtering over a much broader frequency spectrum.
For more information about AVX’s general-purpose TransFeed Series MLVs, visit http://www.avx.com/products/circuit-protection/transient-voltage-suppressors-varistors/transfeed-general-purpose/. For more information about AVX’s TransFeed Automotive Series MLVs, visit http://www.avx.com/products/circuit-protection/transient-voltage-suppressors-varistors/transfeed-automotive-series/