RKS1D121MCNAJLGS

The RKS1D121MCNAJLGS is a surface-mount conductive polymer aluminum solid electrolytic capacitor in Nichicon’s RKS series. It delivers 120 µF capacitance at a rated voltage of 20 V in a compact φ10 × 12.4 mm SMD can package optimized for high ripple environments.

Designed for general-purpose power applications, the device combines low ESR (20 mΩ at 100 kHz) and high allowable ripple current (2 A at 300 kHz) with long-term endurance (3000 hours at 125°C), making it suitable for demanding board-level power filtering and decoupling in compact assemblies.

Key Features

• Capacitance and Voltage: 120 µF nominal capacitance with a rated voltage of 20 V and tolerance of −20% to +20%.
• Low ESR & Loss: ESR specified at 20 mΩ (measured at 100 kHz, 20°C) and tanδ 0.12 (measured at 120 Hz, 20°C), reducing conduction losses in high-frequency applications.
• High Ripple Current Handling: Low-frequency ripple current 200 mA (120 Hz) and high-frequency ripple current 2 A (300 kHz) for robust performance in switching power stages.
• Wide Temperature Range & Endurance: Rated for −55°C to +125°C with a load life of 3000 hours at 125°C to support extended operation under elevated temperatures.
• Leakage Current: Specified leakage current of 120 µA, measured after standard conditioning.
• Surface-Mount Can Package: Radial, can-style SMD (φ10 × 12.4 mm) suitable for compact board layouts and automated placement.
• Assembly & Packaging: Embossed carrier taping with moisture-proof packing; device supports lead-free reflow soldering up to 260°C peak per the datasheet profile.
• RoHS Compliance: Compliant with RoHS (2011/65/EU, (EU)2015/863).

Typical Applications

• Power-supply filtering: Bulk and output smoothing in board-level power supplies where high ripple handling and low ESR improve regulation and thermal performance.
• High-frequency decoupling: Decoupling for switching regulators and converters leveraging the 2 A ripple capability at 300 kHz.
• Compact SMD designs: Space-constrained electronics that require a radial can SMD capacitor with long life and high temperature endurance.

Unique Advantages

• Low thermal and conduction loss: 20 mΩ ESR at 100 kHz and low tanδ reduce power dissipation in high-frequency circuits.
• High ripple tolerance: 2 A high-frequency ripple rating and 200 mA low-frequency rating support aggressive switching loads and reduce the need for multiple parallel parts.
• Long operational life at elevated temperature: 3000 hours at 125°C provides predictable endurance for designs that operate under sustained thermal stress.
• Compact SMD can form factor: φ10 × 12.4 mm SMD can offers a high-capacitance solution in a small board footprint for automated assembly.
• Lead-free reflow capable: Built for lead-free reflow soldering up to 260°C peak per the datasheet, simplifying modern assembly processes.
• Regulatory readiness: RoHS compliance for global environmental regulation alignment.

Why Choose RKS1D121MCNAJLGS?

RKS1D121MCNAJLGS positions itself as a robust, surface-mount conductive polymer aluminum capacitor for engineers needing high-capacitance, low-ESR components that withstand elevated temperatures and significant ripple currents. Its combination of 120 µF at 20 V, 20 mΩ ESR, 2 A high-frequency ripple capability, and 3000-hour endurance at 125°C makes it suitable for compact power-management and decoupling applications where reliability and thermal performance matter.

This part is ideal for designers seeking a compact SMD can solution that supports automated assembly and lead-free reflow while offering predictable endurance and RoHS compliance for long-term platform stability.

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