RKS1K390MCNAJJGS

The RKS1K390MCNAJJGS from Nichicon is a surface-mount conductive polymer aluminum solid electrolytic capacitor offering 39 µF capacitance at an 80 V rating. It is designed for general-purpose power applications that require compact SMD packaging combined with high ripple capability and extended high-temperature endurance.

With an operating temperature range of -55°C to 125°C and a rated load life of 3000 hours at 125°C, this part targets designs that demand stable filtering, decoupling and bulk energy storage in elevated-temperature environments.

Key Features

• Capacitance & Voltage — 39 µF capacitance with an 80 V rated voltage and tolerance of -20% to +20%.
• Low ESR & High Ripple Handling — ESR of 30 mΩ measured at 20°C/100 kHz, with low-frequency ripple current of 140 mA (120 Hz) and high-frequency ripple current of 1.4 A (300 kHz).
• Loss Characteristics — tanδ (DF) of 0.12 measured at 20°C, 120 Hz, supporting stable AC performance.
• Leakage Current — Specified leakage current of 156 µA after standard conditioning.
• High-Temperature Endurance — Rated life of 3000 hours at 125°C under rated voltage, ensuring long-term reliability in hot environments.
• Robust Temperature Range — Wide operating range from -55°C to 125°C for demanding thermal conditions.
• SMD Can Package — φ10 × 10 mm radial can SMD (surface-mount) package, supplied in embossed carrier taping with moisture-proof packing for automated assembly.
• RoHS Compliant — Manufactured to meet RoHS requirements.

Typical Applications

• Power Supply Decoupling — Compact SMD form factor and low ESR make it suitable for bulk decoupling and smoothing in DC power rails.
• High-Voltage Power Modules — 80 V rating supports energy storage and filtering in mid- to high-voltage power conversion stages.
• Industrial Electronics — Extended temperature range and 3000-hour life at 125°C suit applications in industrial control and power electronics operating at elevated temperatures.
• High-Frequency Filtering — Low ESR at 100 kHz and 1.4 A high-frequency ripple current capability support filtering in high-frequency switching circuits.

Unique Advantages

• High-Temperature Reliability: Rated 3000 hours at 125°C, providing predictable aging and performance retention in hot environments.
• Compact SMD Can: φ10 × 10 mm SMD packaging combines a small footprint with radial-can performance for automated PCB assembly.
• Strong Ripple Tolerance: 1.4 A high-frequency ripple current capability and low 30 mΩ ESR enable improved thermal handling and voltage stability under dynamic loads.
• Measured Loss Parameters: Specified tanδ of 0.12 at 20°C/120 Hz supports designers needing quantifiable AC loss characteristics.
• Controlled Leakage: Leakage current specified at 156 µA for predictable standby and quiescent behavior in power-sensitive designs.
• Supply-Chain Ready Packaging: Embossed carrier taping with moisture-proof packing facilitates automated pick-and-place and inventory handling.

Why Choose RKS1K390MCNAJJGS?

RKS1K390MCNAJJGS is positioned for engineers who need a durable, compact SMD aluminum polymer capacitor that balances high-voltage capability, low ESR, and long life at elevated temperatures. Its combination of 80 V rating, low-loss characteristics, and 3000-hour endurance at 125°C makes it well suited to designs where thermal stress and ripple currents are key design drivers.

This part is ideal for general-purpose power systems, industrial electronics, and high-frequency switching circuits where predictable leakage, quantified tanδ, and robust packaging simplify BOM decisions and integration into automated assembly lines. Backed by Nichicon manufacturing and RoHS compliance, it offers a reliable component choice for long-term product deployments.

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