AVX Corporation (Greenville, SC) offers the SQ Series, the RF capacitor series rated at 50 VDC to 500 VDC with capacitance values ranging from 0.1pF to 1000pF. It is suitable for medical devices such as MRI coils, and offers low ESR, high Q, high current, and high self-resonance frequency values. The capacitors are constructed using a fine-grained porcelain dielectric with palladium internal electrodes to keep moisture out. They are rated for operation between -55 °C to 125 °C and feature P90 and NPO characteristics as well as a 100 percent tin finish. They are available in 0603, 0605, 0805, and 1210 case sizes.
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