RKS1D221MCNAHHGS

The RKS1D221MCNAHHGS is a surface-mount conductive-polymer aluminum electrolytic capacitor with a rated capacitance of 220 µF and a rated voltage of 20 V. It combines low equivalent series resistance (ESR) and high allowable ripple current to support high-frequency smoothing and decoupling in compact SMD assemblies.

Built for elevated-temperature operation, this part is specified for –55 °C to 125 °C and a load life of 3000 hours at 125 °C, offering a reliable option where high ripple handling, low loss, and extended endurance are required.

Key Features

• Capacitance & Voltage — 220 µF nominal capacitance at a rated voltage of 20 V, with tolerance of −20% to +20% at 120 Hz, 20 °C.
• Low ESR & High-Frequency Performance — ESR of 30 mΩ measured at 100 kHz (20 °C) and a high-frequency ripple current rating of 1.6 A at 300 kHz, enabling effective high-frequency filtering and decoupling.
• Low-Frequency Ripple Capability — Rated low-frequency ripple current of 160 mA at 120 Hz for improved performance in lower-frequency power-conditioning scenarios.
• Temperature and Endurance — Operational temperature range from −55 °C to 125 °C with a guaranteed load life of 3000 hours at 125 °C.
• Leakage and Loss — Specified leakage current of 220 µA and tan δ of 0.12 (measured at 20 °C, 120 Hz) to aid in predictable bias behavior and loss budgeting.
• SMD Radial Can Package — Compact φ8 × 8.7 mm can-style SMD package suitable for automated placement; compatible with lead-free reflow profiles (peak up to 260 °C per soldering recommendations).
• Environmental Compliance — RoHS-compliant construction.

Typical Applications

• Power-supply decoupling — Low ESR and high ripple-current capability support bulk and local decoupling on high-frequency power rails.
• Switching regulator output filtering — High-frequency ripple rating (1.6 A at 300 kHz) and 30 mΩ ESR help reduce output ripple in switching converters.
• Noise suppression and smoothing — Effective for smoothing across a range of frequencies thanks to measurable performance at both 120 Hz and 100+ kHz test conditions.

Unique Advantages

• High ripple-handling capacity: The combination of 1.6 A high-frequency ripple current rating and 30 mΩ ESR supports demanding filtering tasks without excessive temperature rise.
• Extended high-temperature endurance: Rated for 3000 hours at 125 °C, providing predictable lifetime behavior for designs operating at elevated temperatures.
• Compact SMD form factor: φ8 × 8.7 mm radial can SMD package enables space-saving placement while remaining compatible with standard lead-free reflow processes.
• Predictable electrical characteristics: Specified tan δ, leakage current, and tolerance values enable reliable design margining and failure-mode analysis.
• Regulatory compliance: RoHS compliance supports use in designs with environmental-restricted substance requirements.

Why Choose RKS1D221MCNAHHGS?

RKS1D221MCNAHHGS positions itself as a robust conductive-polymer aluminum SMD capacitor for designs that require low ESR, significant ripple-current capability, and long endurance at elevated temperatures. Its 220 µF/20 V rating, combined with a 30 mΩ ESR at 100 kHz and a 3000-hour life at 125 °C, makes it well suited to power-supply filtering and high-frequency smoothing in compact assemblies.

Engineers seeking predictable performance under thermal and ripple stress will value the measurable specifications for ripple current, leakage, and dissipation factor, along with RoHS compliance and lead-free reflow compatibility for modern manufacturing flows.

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