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New AVX Radial CapGuard Varistors Provide Circuit Protection & High Frequency Noise Filtering in a Single Component

AVX has introduced the new radial leaded CapGuard™ Automotive Series. Combining multilayer varistor (MLV) and high capacitance, temperature stable X7R multilayer ceramic capacitor (MLCC) technology in a single, high-reliability device, the new CapGuard™ Series exhibits bi-directional transient voltage protection, excellent EMI/RFI attenuation over a wide frequency spectrum, and multi-strike capabilities in a compact, radial configuration with a conformal epoxy coating that provides enhanced resistance against harsh environments, mechanical shock, and vibration. Qualified to AEC-Q200, CapGuard™ devices exhibit exceptional current and energy handling capabilities, and are ideally suited to protect sensitive electronics from high voltage transients, as well as to filter out high frequency EMI/RFI noise generated by switch mode power supplies, motors on DC lines, I/O lines in electronic circuits, inductive switching, relays, and other applications.

"Our new radial leaded CapGuard™ Automotive Series devices allow design engineers to protect sensitive components against high voltage transients, and filter out unwanted EMI/RFI noise from the circuit, with a single, dual function component," said Jiri Machanicek, technical marketing manager at AVX. "Built for durability in harsh environments, CapGuard™ Series devices are the ideal choice for applications that require EMI filtering, surge protection, high reliability performance, enhanced mechanical resistance, and the conservation of board space."

The CapGuard™ Automotive Series is currently available with two working voltages (26VDC and 45VDC), two capacitances (0.47µF and 1µF), both with ±20% tolerance, and two energy ratings (0.6J and 0.7J). Rated for operating temperatures spanning -55°C to +125°C, and ESD-rated to 25kV (HBM ESD Level 6), the RoHS compliant series is available in two sizes: 20 and 21, both of which measure, at a maximum, 5.99mm wide, 7.49mm high, and 4.5mm thick, and have a lead diameter of 0.508mm. Lead spacing for size 20 parts with straight leads is 2.54mm, and lead spacing for size 21 parts with kinked leads is 5.08mm. CapGuard™ Automotive Series devices can be shipped in bulk or on one of two standard tape and reel packaging options. Lead time for the series is 27 weeks.

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