RKS1D121MCNAFEGS

The RKS1D121MCNAFEGS is a surface-mount conductive polymer aluminum electrolytic capacitor offering 120 µF capacitance at a 20 V rating. It combines low ESR and high allowable ripple current in a compact radial can SMD package, designed for demanding temperature and frequency environments.

Targeted at engineers needing reliable, high-frequency smoothing and decoupling in compact assemblies, this part delivers long endurance at elevated temperature, solder reflow compatibility, and RoHS compliance for production-ready designs.

Key Features

• Capacitance & Voltage — 120 µF nominal capacitance with a rated voltage of 20 V and capacitance tolerance ±20% (120 Hz, 20°C).
• Low ESR & High-Frequency Performance — ESR 50 mΩ (measured at 20°C, 100 kHz) and tanδ 0.12 (20°C, 120 Hz) to support stable high-frequency operation.
• High Allowable Ripple Current — Low-frequency ripple current 90 mA (120 Hz) and high-frequency ripple current 900 mA (300 kHz) for robust filtering under dynamic loads.
• Extended Temperature & Lifetime — Rated for operation from −55°C to +125°C with an endurance rating of 3000 hours at 125°C.
• SMD Can Package — Radial, can-style SMD package with dimensions Ø6.3 × 5.8 mm and recommended PCB land size 6.6 × 6.6 mm for compact layouts.
• Soldering & Assembly — Designed for lead‑free reflow soldering profiles (peak up to 260°C) and supplied in embossed carrier taping with moisture-proof packing for production lines.
• Leakage Current — Specified leakage current of 120 µA, supporting predictable bias characteristics after application of rated voltage.
• Regulatory Compliance — RoHS compliant for modern manufacturing and environmental requirements.

Typical Applications

• High‑frequency power filtering — Low ESR and 900 mA HF ripple current capability make this capacitor suitable for smoothing and EMI/RC filtering at switching frequencies.
• Point‑of‑load decoupling — Compact SMD can and high ripple tolerance support decoupling in space-constrained power stages.
• Embedded systems in elevated temperatures — Rated −55°C to +125°C with 3000-hour endurance at 125°C for designs requiring long-term thermal reliability.
• Surface‑mount production — Lead‑free reflow compatibility and embossed carrier taping enable automated assembly and reliable soldering performance.

Unique Advantages

• Balanced electrical performance — Combines 120 µF capacitance with low ESR (50 mΩ) and low tanδ (0.12) to stabilize high-frequency circuits without large board area.
• High ripple handling — 900 mA HF and 90 mA LF ripple ratings let designers manage transient and steady ripple stress effectively.
• Thermal endurance — 3000-hour life at 125°C provides predictable aging and reliability in hot environments.
• Production-ready packaging — Embossed carrier taping and moisture-proof packing streamline pick-and-place and storage for high-volume runs.
• RoHS compliance — Meets RoHS requirements to simplify regulatory adherence for manufactured products.

Why Choose RKS1D121MCNAFEGS?

RKS1D121MCNAFEGS positions itself as a reliable, production-ready conductive polymer aluminum capacitor for applications demanding low ESR, high ripple tolerance, and extended thermal endurance. Its compact radial can SMD package and reflow compatibility make it suitable for dense board layouts and automated assembly.

Designers prioritizing stable high-frequency decoupling and long-term performance at elevated temperatures will find this part a practical choice, offering predictable electrical characteristics and manufacturing-friendly packaging that support robust, scalable designs.

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