RKS1C121MCNAFEGS

The RKS1C121MCNAFEGS is a surface-mount conductive polymer aluminum solid electrolytic capacitor in Nichicon’s RKS series. It delivers 120 µF capacitance at a 16 V rating in a compact φ6.3 × 5.8 mm radial can SMD package designed for general-purpose electronic circuits.

Engineered for high-frequency ripple handling and reliability, this capacitor provides low equivalent series resistance (50 mΩ at 100 kHz), audible low-frequency and high-frequency ripple capability, and extended endurance — 3,000 hours at 125 °C — for demanding thermal and electrical environments. It is RoHS compliant and supplied in embossed carrier tape with moisture-proof packing for automated assembly.

Key Features

• Capacitance & Voltage — 120 µF nominal capacitance with a 16 V rated voltage and tolerance of -20% to +20% (measured at 20 °C, 120 Hz).
• Low ESR — 50 mΩ equivalent series resistance measured at 20 °C / 100 kHz, supporting efficient high-frequency performance.
• High Ripple Current Capability — Rated low-frequency ripple current of 100 mA (120 Hz) and high-frequency ripple current of 1 A (300 kHz), enabling effective decoupling and noise suppression in high-frequency circuits.
• Wide Temperature Range & Endurance — Operating range from -55 °C to 125 °C with a rated life of 3,000 hours at 125 °C, delivering long-term stability under elevated temperature stress.
• Leakage & Loss Characteristics — Leakage current specified at 100 µA and tangent of loss angle (tan δ) of 0.12 at 20 °C, 120 Hz, providing predictable leakage and dissipation behavior.
• SMD Package & Assembly — Compact φ6.3 × 5.8 mm radial can SMD package suited for automated placement; compatible with lead‑free reflow (peak 260 °C) and supplied in embossed carrier tape / moisture-proof packing.
• Compliance — RoHS compliant as specified in the product data.

Typical Applications

• Power rail decoupling — Low ESR (50 mΩ at 100 kHz) and high-frequency ripple current handling (1 A at 300 kHz) make this capacitor suitable for stabilizing and filtering power rails in compact SMD designs.
• High-frequency noise suppression — The conductive polymer construction and defined tan δ enable consistent loss characteristics for suppression of high-frequency switching noise.
• General-purpose SMD circuits — Designed for general-purpose applications where a compact 120 µF, 16 V SMD capacitor with robust thermal endurance is required.
• Elevated-temperature environments — Rated to operate from -55 °C to 125 °C with 3,000 hours endurance at 125 °C for applications exposed to sustained high temperatures.

Unique Advantages

• Low ESR for efficient decoupling: 50 mΩ ESR at 100 kHz reduces voltage ripple and power loss in high-frequency circuits.
• High-frequency ripple capability: 1 A ripple current rating at 300 kHz supports demanding switching applications and effective noise attenuation.
• Long high-temperature life: 3,000 hours endurance at 125 °C provides predictable performance and longevity in thermally stressed designs.
• Compact SMD form factor: φ6.3 × 5.8 mm radial can SMD package balances high capacitance with space-constrained layouts and automated assembly readiness.
• Predictable leakage and loss: Specified leakage current (100 µA) and tan δ (0.12 at 20 °C, 120 Hz) facilitate accurate power budgeting and thermal design.
• RoHS compliance and packaging for automation: Environmentally compliant and shipped in embossed carrier tape with moisture-proof packing for reliable pick-and-place processing.

Why Choose RKS1C121MCNAFEGS?

The RKS1C121MCNAFEGS combines conductive polymer aluminum chemistry with a compact SMD radial can to deliver stable 120 µF capacitance at 16 V with low ESR and high-frequency ripple handling. Its extended endurance at elevated temperature (3,000 hours at 125 °C) and clearly specified leakage, tan δ, and ripple ratings make it a dependable choice for engineers needing predictable decoupling and filtering in compact, thermally demanding designs.

This part is well suited for general-purpose SMD applications where designers require a balance of capacitance density, low impedance at high frequency, and long-term thermal reliability, while maintaining RoHS compliance and compatibility with lead‑free assembly processes.

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