RKS1E221MCNAJLGS

The RKS1E221MCNAJLGS is a surface-mount conductive polymer aluminum solid electrolytic capacitor from Nichicon's RKS series. It delivers 220 µF capacitance at a 25 V rating with low ESR and high allowable ripple current, tailored for general-purpose SMD power applications.

Engineered for reliability across a wide temperature range, this part combines a compact φ10 × 12.4 mm can-style SMD package with a long endurance rating of 3000 hours at 125°C and RoHS compliance for modern assembly processes.

Key Features

• Electrical Performance — 220 µF nominal capacitance at 25 V with ±20% tolerance (measured at 120 Hz, 20°C), suitable for bulk decoupling and smoothing in power circuits.
• Low ESR & High-Frequency Capability — ESR of 20 mΩ (measured at 20°C / 100 kHz) and high-frequency ripple current rating of 2.0 A at 300 kHz support efficient high-speed decoupling.
• Ripple Current — Low-frequency ripple current of 200 mA at 120 Hz and high-frequency ripple current of 2000 mA provide robust performance across switching and linear power conditions.
• Reliability & Endurance — Rated for 3000 hours at 125°C, with endurance characteristics specified for capacitance, tan δ and ESR after life testing.
• Wide Operating Temperature — Specified operating range from –55°C to 125°C to accommodate harsh thermal environments.
• Package & Assembly — φ10 × 12.4 mm radial can SMD package with embossed carrier taping and moisture-proof packing; compatible with lead-free reflow profiles noted in the series datasheet.
• Leakage & Dissipation — Leakage current specified at 275 µA and tan δ of 0.12 (measured at 20°C, 120 Hz), enabling predictable power-loss and leakage budgeting.
• Compliance — RoHS compliant per product data.

Typical Applications

• Power filtering and smoothing — Low ESR and high allowable ripple current make this capacitor suitable for bulk filtering on DC rails and power supply outputs.
• High-frequency decoupling — 2.0 A ripple capability at 300 kHz supports decoupling near high-speed switching components.
• General-purpose SMD circuits — Compact can-style SMD packaging and long-life rating support reliable board-level energy storage in a variety of designs.

Unique Advantages

• High capacitance in a compact SMD can — 220 µF in a φ10 × 12.4 mm package provides significant bulk energy storage without a large board footprint.
• Low ESR for efficient power delivery — 20 mΩ ESR at 100 kHz reduces conduction losses and improves transient response in switching power stages.
• High ripple tolerance across frequencies — Rated ripple currents at both 120 Hz and 300 kHz cover a broad range of real-world power conditions.
• Long high-temperature endurance — 3000-hour life at 125°C supports extended service in thermally demanding applications.
• Predictable leakage and dissipation — Specified leakage current (275 µA) and tan δ (0.12) allow straightforward thermal and leakage budgeting.
• Assembly-ready packaging — Embossed carrier taping with moisture-proof packing facilitates automated SMD assembly and storage.

Why Choose RKS1E221MCNAJLGS?

RKS1E221MCNAJLGS positions itself as a robust, general-purpose SMD conductive polymer aluminum capacitor engineered for power filtering and decoupling roles where low ESR, high ripple capability, and elevated temperature endurance matter. Its combination of 220 µF capacitance, 25 V rating, and a 3000-hour life at 125°C makes it suitable for engineers designing for long-term reliability in compact power subsystems.

This part is well suited to design teams and procurement seeking a proven, RoHS-compliant SMD capacitor with predictable electrical characteristics and assembly-ready packaging for medium- to high-power board-level applications.

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