RFCS04023900CJTTS

Overview

The RFCS04023900CJTTS is a silicon-based radio frequency capacitor manufactured by Vishay Electro-Films. It features a capacitance of 3.9 pF with a tolerance of ±5%. The device operates at a nominal voltage of 25 V and utilizes a compact 0402 (1005 metric) surface-mount package. Electrical performance includes a temperature coefficient of 100 ppm/°C, ensuring stability across the specified operating temperature range of -55°C to +125°C.

Feature Summary

• Utilizes silicon thin-film technology for high-frequency RF applications
• Provides stable capacitance characteristics within a compact 0402 footprint
• Designed for reliable operation in demanding thermal environments

Applications

• RF signal coupling and decoupling circuits
• Impedance matching networks in wireless communication systems
• Filtering components in high-frequency signal processing

Procurement Notes

This component is currently listed as End-of-Life (EOL) and is no longer in active production. Verification of availability should focus on remaining stock from authorized distributors or third-party suppliers. Procurement planning must account for potential supply constraints and prioritize alternative sourcing strategies due to the discontinuation status.

Selection Notes

Engineers selecting this part should verify that the 3.9 pF value and 25 V rating align with circuit requirements. Given the EOL status, design-in decisions should consider long-term sustainability. The 0402 package size requires appropriate PCB land pattern design. Review datasheets for parasitic parameters relevant to specific RF frequencies to ensure performance meets system specifications.

Part Context

The RFCS series represents Vishay's silicon capacitor portfolio, designed to replace traditional ceramic capacitors in RF applications where size and stability are critical. These components offer superior performance in terms of Q-factor and temperature stability compared to standard MLCCs, making them suitable for advanced wireless infrastructure and consumer electronics requiring miniaturization.

Replacement Considerations

Publicly confirmed substitute part numbers include 04023J3R9BBSTR. Designers should evaluate electrical equivalence, specifically capacitance value, tolerance, and voltage rating, before transitioning to alternative components to maintain circuit integrity.