RFCS04021800CBTTS

Overview

The RFCS04021800CBTTS is a silicon-based radio frequency capacitor from the Vishay Electro-Films RFCS series. It features a nominal capacitance of 1.8 pF with a tolerance of ±0.1 pF and a voltage rating of 50 V. The component utilizes a 0402 (1005 metric) surface-mount package, measuring 1.02 mm in length, 0.51 mm in width, and 0.38 mm in height. It operates within a temperature range of -55°C to +125°C and has a temperature coefficient of 100 PPM/°C.

Feature Summary

• Utilizes silicon thin-film technology for stable RF performance
• High Q factor suitable for high-frequency applications
• Compact 0402 surface-mount footprint for space-constrained designs

Applications

• RF circuit matching networks
• High-frequency signal filtering
• Impedance matching in wireless communication modules

Procurement Notes

This component is officially listed as obsolete or end-of-life by the manufacturer. Availability is restricted, and sourcing may require checking for limited stock or alternative distributors. Verify current lifecycle status and lead times carefully before design finalization to avoid supply chain disruptions.

Selection Notes

Select this part only if its specific 1.8 pF value and 50 V rating align precisely with circuit requirements. Due to its obsolete status, engineers should evaluate equivalent components from other manufacturers or newer Vishay series that offer active production status and longer availability windows.

Part Context

Part of the RFCS series of silicon capacitors designed for RF and microwave applications. These components replace traditional ceramic capacitors in high-frequency circuits where stability and low parasitic inductance are critical. The series offers various capacitance values in standard SMT packages.

Replacement Considerations

Public confirmed substitute: 0402ZK220GBSTR (KYOCERA AVX). Note that this substitute has a different capacitance value (22 pF vs 1.8 pF) and is explicitly listed as an alternative for a different model (RFCS04022200BJTTS), not directly for this 1.8 pF unit. No direct 1.8 pF substitute is publicly confirmed.