RKS1C391MCNAJJGS

The RKS1C391MCNAJJGS is a surface-mount conductive polymer aluminum electrolytic capacitor in Nichicon's RKS series, offering 390 µF capacitance at a 16 V rating. It combines high capacitance density with low ESR and high allowable ripple current for general-purpose electronic applications.

Designed for reliability in elevated-temperature environments, this SMD can withstand −55 °C to 125 °C and is specified for a 3000-hour load life at 125 °C, supporting demanding power and thermal conditions while providing RoHS-compliant materials and lead-free reflow compatibility.

Key Features

• Capacitance & Tolerance — 390 µF nominal with tolerance of −20% to +20% (measured at 20 °C, 120 Hz).
• Rated Voltage — 16 V DC rated voltage for mid-voltage power applications.
• Low Equivalent Series Resistance (ESR) — 20 mΩ specified at 20 °C, 100 kHz, supporting efficient high-frequency performance.
• High Allowable Ripple Current — 210 mA at 120 Hz and 2.1 A at 300 kHz for improved smoothing and decoupling under dynamic loads.
• Loss Tangent (tan δ) — 0.12 measured at 20 °C, 120 Hz, useful for predictable AC performance.
• Leakage Current — 312 µA specified after standard conditioning.
• Temperature & Endurance — Rated operating range −55 °C to 125 °C with a rated life of 3000 hours at 125 °C.
• Package & Mounting — φ10 × 10 mm can-style SMD (radial, can - SMD) with embossed carrier taping and moisture-proof packing for automated assembly and handling.
• RoHS Compliance — Constructed to meet RoHS requirements for restricted substances.

Typical Applications

• General-purpose electronics — Bulk capacitance and stable ESR for a wide range of consumer and industrial electronic designs.
• High-ripple current power circuits — Supports power rails and converters that demand elevated ripple-current capability at both low and high frequencies.
• High-temperature systems — Suitable for equipment operating across a wide temperature span, backed by a 3000-hour endurance rating at 125 °C.
• Automated surface-mount assemblies — SMD can package with embossed carrier taping and lead-free reflow compatibility simplifies placement and reflow processes.

Unique Advantages

• High ripple handling: Specified ripple current of 210 mA (120 Hz) and 2.1 A (300 kHz) enables reliable smoothing in dynamic power environments.
• Low ESR for efficient performance: 20 mΩ at 100 kHz reduces losses and improves high-frequency response in decoupling and filtering applications.
• Extended high-temperature endurance: 3000 hours at 125 °C provides long-term stability and predictable aging in thermally challenging designs.
• Wide operating temperature range: −55 °C to 125 °C accommodates a broad set of environmental conditions and deployment scenarios.
• Assembly-ready SMD format: φ10×10 mm can with embossed carrier taping and moisture-proof packing supports high-throughput surface-mount production and lead-free reflow processes.
• Regulatory compliance: RoHS-compliant construction supports regulatory requirements for restricted substances.

Why Choose RKS1C391MCNAJJGS?

The RKS1C391MCNAJJGS balances high capacitance, low ESR and strong ripple-current capability in a compact SMD can, making it well suited to designers who need robust decoupling and bulk energy storage in constrained board real estate. Its 3000-hour endurance at 125 °C and wide operating temperature range deliver predictable performance in thermally demanding and long-life applications.

This part is appropriate for engineering teams and procurement focused on reliable, assembly-friendly capacitors for general-purpose electronic systems where long-term thermal stability, low losses, and automated manufacturing are priorities.

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