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The RFCS04021800CBTT1 is a silicon-based radio frequency capacitor manufactured by Vishay Electro-Films. It features a nominal capacitance of 1.8 pF with a tolerance of ±0.5 pF and a temperature coefficient of 100 PPM/°C. The component operates within a temperature range of -55°C to +125°C and has a breakdown voltage of 50 V. Housed in a 0402 (1005 metric) surface-mount package measuring 1.02 mm x 0.51 mm x 0.38 mm, it utilizes SMD/SMT termination. This device belongs to the RFCS series designed for high-frequency applications.
This component is officially classified as obsolete and no longer manufactured by Vishay. Procurement is restricted to remaining stock from authorized distributors or secondary market suppliers. Verify part authenticity and condition carefully when sourcing end-of-life inventory. Ensure compatibility with replacement components before finalizing acquisition plans.
Select this component only if legacy design compatibility requires the specific 1.8 pF silicon capacitor characteristics. Evaluate thermal stability requirements against the 100 PPM/°C coefficient. Confirm that the 0402 footprint matches the PCB layout constraints. Consider alternative active parts if new designs allow for updated component selection.
The RFCS series represents Vishay's silicon capacitor line, offering alternatives to traditional ceramic dielectrics. These components provide consistent performance across wide temperature ranges and are suitable for precision RF applications where stability is critical. The 0402 case size allows for compact circuit board designs.
Direct substitutes include the KYOCERA AVX 0402ZK220GBSTR for similar capacitance values in the same package. Verify electrical parameters and physical dimensions before substitution.