RKS1D390MCNAHFGS

The RKS1D390MCNAHFGS is a surface-mount conductive polymer aluminum solid electrolytic capacitor from Nichicon’s RKS series. It delivers 39 µF capacitance at 20 V in a compact φ8 × 6.7 mm SMD can, engineered for applications that require low ESR and high allowable ripple current.

Designed for high-temperature operation and long endurance, this part offers a wide operating range (−55 °C to 125 °C) and a rated load life of 3000 hours at 125 °C, making it suitable for robust, high-reliability electronic assemblies.

Key Features

• Capacitance & Voltage — 39 µF rated capacitance with a 20 V rated voltage and tolerance of −20% to +20%, suitable for decoupling and smoothing in compact SMD designs.
• Conductive Polymer Construction — Solid electrolytic, conductive polymer architecture for stable performance and reduced equivalent series resistance compared with traditional wet electrolytes.
• Low ESR & High-Frequency Performance — ESR of 30 mΩ measured at 20 °C/100 kHz and tanδ of 0.12 (20 °C, 120 Hz) for efficient high-frequency operation.
• High Ripple Current Capability — Rated low-frequency ripple current of 160 mA (120 Hz) and high-frequency ripple current of 1.6 A (300 kHz), supporting high-ripple SMD power stages.
• Endurance at Elevated Temperature — Load life specified at 3000 hours at 125 °C, with defined limits for capacitance change, tanδ and ESR after endurance testing.
• Surface-Mount Packaging — Compact φ8 × 6.7 mm radial can SMD package with embossed carrier taping and moisture-proof packing for automated assembly.
• Reliability & Safety Parameters — Leakage current up to 100 µA (after 2 minutes at rated voltage) and compliance with RoHS requirements.

Typical Applications

• High-ripple power modules — Low ESR and 1.6 A high-frequency ripple current rating make this part suitable for SMD power stages that experience significant ripple.
• DC–DC converters and point-of-load filtering — 39 µF capacitance and strong high-frequency performance assist in output smoothing and transient handling in compact converters.
• Industrial and telecom electronics — Wide operating temperature range (−55 °C to 125 °C) and 3000-hour endurance at 125 °C support use in thermally demanding systems.

Unique Advantages

• Compact high-capacitance SMD solution: 39 µF in a φ8 × 6.7 mm can saves board space while providing substantial bulk capacitance for power supply stages.
• Low ESR for efficient power delivery: 30 mΩ ESR at 100 kHz reduces losses and improves converter efficiency in high-frequency applications.
• High allowable ripple current: Rated ripple currents (160 mA @120 Hz, 1.6 A @300 kHz) enable reliable performance under continuous ripple stress.
• Extended high-temperature life: 3000 hours at 125 °C gives designers predictable aging characteristics for long-life thermal environments.
• Assembly-ready packaging: Embossed carrier taping and moisture-proof packing simplify pick-and-place and storage for automated production.
• RoHS compliant: Meets RoHS requirements for lead-free assembly processes.

Why Choose RKS1D390MCNAHFGS?

The RKS1D390MCNAHFGS combines conductive polymer benefits—low ESR and reliable high-frequency performance—with a compact SMD can and long endurance at elevated temperatures. Its specifications are targeted at engineers designing compact power modules and systems that require stable filtering, strong ripple handling, and predictable performance over long thermal stress periods.

This capacitor is well suited for design teams requiring a rugged, surface-mount electrolytic solution with clear electrical and mechanical specifications, streamlined packaging for automated assembly, and RoHS compliance for modern production flows.

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