RKS1D390MCNAHJGS

The RKS1D390MCNAHJGS is a surface‑mount conductive polymer aluminum solid electrolytic capacitor in Nichicon’s RKS series. It delivers 39 µF capacitance at a 20 V rating in a compact φ8 × 10 mm can‑SMD package, designed for general‑purpose power filtering and decoupling in electronics that require high ripple tolerance and extended high‑temperature endurance.

Engineered for reliability in elevated temperatures, this part supports operation from –55°C to 125°C with a rated load life of 3000 hours at 125°C, and is RoHS‑compliant. Key electrical characteristics include low ESR at high frequency, defined leakage limits, and specified tanδ for predictable AC performance.

Key Features

• Core Electricals — 39 µF nominal capacitance with capacitance tolerance ±20% (–20% to +20%) measured at 120 Hz, 20°C; rated voltage 20 V.
• Low Loss / Frequency Performance — tanδ 0.12 (measured at 20°C, 120 Hz, 20 V) for controlled dissipation; ESR 25 mΩ specified at 100 kHz, 20°C for effective high‑frequency decoupling.
• High Ripple Capability — Low‑frequency ripple current 170 mA (120 Hz) and high‑frequency ripple current 1.7 A (300 kHz) to support demanding ripple environments.
• Leakage Current — Specified leakage current up to 100 µA after standard conditioning, enabling predictable bias behavior in circuits.
• Extended High‑Temperature Endurance — Rated life of 3000 hours at 125°C (endurance test condition), with defined limits for capacitance change, tanδ and ESR.
• Compact SMD Can Package — Radial can SMD (φ8 × 10 mm / L:1.0 cm × D:0.8 cm) suitable for space‑constrained board layouts; available in embossed carrier taping with moisture proof packing for automated placement.
• Assembly Compatibility — SMD type suited for lead‑free reflow processes with peak temperature allowance to 260°C as defined in the series datasheet reflow profile.
• Environmental Compliance — RoHS‑compliant per the product information provided.

Typical Applications

• Power filtering and decoupling — Use where compact SMD capacitors are needed to smooth supply rails and manage ripple in power subsystems operating up to 125°C.
• High‑frequency bypassing — Low ESR at 100 kHz and a 1.7 A HF ripple rating make this part suitable for high‑frequency decoupling and stability support for switching regulators.
• Compact, high‑temperature electronics — Designed for general‑purpose boards that require reliable capacitance and performance across –55°C to 125°C.

Unique Advantages

• High thermal endurance: 3000 hours at 125°C provides predictable long‑term performance in elevated temperature environments.
• Low high‑frequency ESR: 25 mΩ at 100 kHz helps reduce voltage ripple and power loss in high‑speed circuits.
• Strong ripple handling: Rated ripple currents of 170 mA (120 Hz) and 1.7 A (300 kHz) support both low‑ and high‑frequency load conditions.
• Compact SMD form factor: φ8 × 10 mm can‑SMD package balances capacitance with board space efficiency and supports automated placement.
• Predictable leakage and dissipation: Leakage current specified at 100 µA and tanδ defined at test conditions help with bias budgeting and thermal design.
• RoHS compliant and reflow capable: Meets environmental directive requirements and is compatible with lead‑free reflow profiles as defined for the series.

Why Choose RKS1D390MCNAHJGS?

The RKS1D390MCNAHJGS combines a compact SMD can package with conductive polymer aluminum construction to deliver stable capacitance, low ESR, and strong ripple tolerance across a wide temperature range. Its endurance rating of 3000 hours at 125°C and defined electrical limits make it suitable for designers building compact, thermally demanding power and decoupling solutions.

This part is ideal for engineers and procurement teams seeking a reliable general‑purpose SMD electrolytic capacitor with measurable high‑frequency performance, clear endurance specifications, and RoHS compliance for modern electronics assemblies.

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