RKS1C391MCNAJLGS

The RKS1C391MCNAJLGS is a surface-mount conductive polymer aluminum solid electrolytic capacitor in a compact radial can SMD package. It delivers 390 µF nominal capacitance at a 16 V rating with low equivalent series resistance and high allowable ripple current for demanding power applications.

Designed for general-purpose electronic power filtering and decoupling, this RoHS-compliant part combines long endurance (3000 hours at 125°C) with SMD-friendly packaging (embossed carrier taping, moisture-proof packing) and solder reflow compatibility up to a 260°C peak.

Key Features

• Capacitance & Voltage — 390 µF nominal capacitance with a rated voltage of 16 V and capacitance tolerance of -20% to +20% (measured at 120 Hz, 20°C).
• Conductive Polymer Architecture — Solid conductive polymer aluminum construction for stable performance and reduced LC compared with typical wet electrolytics.
• Low ESR & High-Frequency Performance — ESR of 20 mΩ measured at 100 kHz (20°C), enabling effective high-frequency decoupling and stable impedance at switching frequencies.
• High Allowable Ripple Current — Rated ripple current of 200 mA at 120 Hz (low frequency) and 2.0 A at 300 kHz (high frequency), supporting power rails with significant ripple and switching noise.
• Long Endurance — Load life specified at 3000 hours at 125°C under rated voltage, with defined limits on capacitance change, tan δ, ESR and leakage after endurance testing.
• Wide Operating Temperature — Specified operating range from -55°C to +125°C for use across a broad set of environmental conditions.
• Leakage & Dissipation — Leakage current specified at 312 µA; tan δ (loss tangent) of 0.12 at 20°C, 120 Hz for predictable loss characteristics.
• SMD Package & Assembly — φ10 × 12.4 mm can (L: 1.24 × D: 1.00 cm) in a radial, SMD can style; supplied in embossed carrier tape with moisture-proof packing and compatible with reflow soldering up to 260°C peak.
• Regulatory — RoHS compliant.

Typical Applications

• Power supply decoupling and bulk smoothing — Low ESR and high allowable ripple current make it suitable for output filtering on DC‑DC converters and power rails.
• Switching regulator support — Effective at reducing switching noise and stabilizing voltage rails at high frequencies thanks to 20 mΩ ESR at 100 kHz and 2.0 A high-frequency ripple rating.
• Industrial and embedded electronics — Wide -55°C to +125°C temperature range and 3000‑hour endurance at 125°C support robust operation in demanding environments.
• General-purpose SMD power modules — Compact φ10 × 12.4 mm SMD can with embossed tape packaging facilitates automated assembly for high-density power designs.

Unique Advantages

• Low-impedance filtering: 20 mΩ ESR at 100 kHz lowers voltage ripple and improves transient response in high-frequency circuits.
• High ripple tolerance: Rated ripple currents of 200 mA (120 Hz) and 2.0 A (300 kHz) let designers handle both low-frequency bulk ripple and high-frequency switching stress.
• Thermal endurance: 3000 hours at 125°C provides a clear, manufacturer-specified life metric for thermal reliability planning.
• SMD-ready packaging: Embossed carrier taping and moisture-proof packing enable surface-mount assembly and reflow processing up to 260°C peak.
• Predictable loss characteristics: tan δ of 0.12 (20°C, 120 Hz) yields consistent dissipation behavior for thermal and stability calculations.
• Regulatory readiness: RoHS compliance supports designs requiring lead‑free environmental conformity.

Why Choose RKS1C391MCNAJLGS?

RKS1C391MCNAJLGS is positioned as a high-capacitance, low‑ESR SMD electrolytic capacitor for designers needing reliable power filtering, particularly where high-frequency performance and ripple tolerance matter. Its conductive polymer construction, combined with a defined 3000‑hour life at 125°C and broad −55°C to +125°C operating range, delivers predictable behavior for industrial and embedded power systems.

This part is well suited to engineers specifying compact SMD capacitors for DC‑DC converter outputs, power rails, and other general-purpose power applications that require automated assembly and regulatory compliance. The combination of electrical performance, thermal endurance, and tape-and-reel packaging supports efficient integration into production BOMs.

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