RKS1D221MCNAHFGS

The RKS1D221MCNAHFGS from Nichicon is a surface-mount conductive polymer aluminum solid electrolytic capacitor delivering 220 µF at 20 V in a compact φ8 × 6.7 mm radial SMD can. Designed for applications that demand low equivalent series resistance and high ripple-current capability, it provides long-term stability across a wide temperature range.

Key value propositions include low ESR (30 mΩ at 100 kHz), high-frequency ripple handling up to 1.6 A (300 kHz), and extended endurance (3000 hours at 125°C), making it suitable for dense, thermally demanding power designs.

Key Features

• Capacitance & Voltage — 220 µF rated capacitance at 20 V with tolerance of −20% to +20% for reliable bulk and decoupling performance.
• Low Loss & Frequency Performance — tanδ (DF) 0.12 measured at 20°C, 120 Hz; ESR 30 mΩ specified at 100 kHz for low-loss operation in high-frequency circuits.
• High Ripple Current Handling — Low-frequency ripple current 160 mA (120 Hz) and high-frequency ripple current 1.6 A (300 kHz) to support switching regulators and high-current power rails.
• Thermal Endurance — Rated operating range −55°C to 125°C with a load life of 3000 hours at 125°C, providing long-term stability in elevated-temperature environments.
• Leakage Current — Specified leakage current of 220 µA, suitable for controlled bias conditions and predictable discharge behavior.
• Surface-Mount Package — Compact φ8 × 6.7 mm SMD radial can with surface mount land size L: 8.3 × W: 8.3 mm; supplied in embossed carrier taping with moisture-proof packing for automated assembly.
• Assembly Compatibility — Designed for lead-free reflow processes; datasheet specifies resistance to soldering heat up to a 260°C peak reflow profile.
• RoHS Compliant — Conforms to RoHS requirements for use in regulated assembly processes.

Typical Applications

• Power supply decoupling — Low ESR and high HF ripple capability make this capacitor suitable for decoupling and local bulk filtering on switching regulator outputs.
• Switching power modules — High allowable ripple current and 30 mΩ ESR help manage losses and thermal rise in high-frequency power stages.
• Telecom and networking equipment — Extended endurance at 125°C supports continuous operation in rack-mounted and always-on power systems.
• Industrial control electronics — Wide operating temperature range (−55°C to 125°C) provides robustness for thermally variable industrial environments.

Unique Advantages

• Low ESR for efficient filtering: 30 mΩ at 100 kHz reduces I²R losses and minimizes voltage ripple on power rails.
• High-frequency ripple capacity: Rated 1.6 A at 300 kHz enables handling of high switching currents common in modern converters.
• High-temperature endurance: 3000-hour life at 125°C provides predictable aging and extended service life in elevated-temperature designs.
• Compact SMD radial can: φ8 × 6.7 mm footprint offers high capacitance density for space-constrained PCBs while supporting automated placement and embossed carrier taping.
• Reflow-compatible packaging: Specified for lead-free reflow (260°C peak), simplifying integration into lead-free surface-mount assembly processes.

Why Choose RKS1D221MCNAHFGS?

The RKS1D221MCNAHFGS balances high capacitance and low impedance in a compact SMD package, offering engineers a reliable option for high-ripple, high-temperature power designs. Its combination of 220 µF capacitance, 20 V rating, low ESR, and extended endurance at 125°C makes it well suited for systems that require stable bulk filtering and efficient high-frequency performance.

This capacitor is a practical choice for design teams targeting durable, manufacturable power solutions—providing predictable electrical characteristics, reflow compatibility, and supply-chain friendly packaging for automated assembly.

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