RKS1D391MCNAJLGS

The RKS1D391MCNAJLGS is a conductive polymer aluminum solid electrolytic capacitor in a compact surface-mount can designed for general-purpose electronic applications. It delivers 390 µF at a 20 V rating in a low-ESR SMD package suited to compact power and decoupling designs.

Key value comes from a combination of high capacitance density, low equivalent series resistance, high allowable ripple current, a wide operating temperature range (−55 °C to +125 °C) and an endurance rating of 3000 hours at 125 °C, making it suitable for long-life, temperature-challenged applications.

Key Features

• Capacitance & Voltage — 390 µF nominal capacitance with a 20 V rated voltage and tolerance of −20% to +20% for predictable bulk energy storage.
• Low ESR & High Ripple Handling — ESR of 20 mΩ measured at 100 kHz and high-frequency ripple current rated at 2 A (300 kHz) plus 200 mA at 120 Hz, enabling effective smoothing and decoupling in high-current switching environments.
• Conductive Polymer Electrolyte — Polymer aluminum solid electrolyte construction for stable performance and reduced loss tangent (tan δ = 0.12 at 20 °C, 120 Hz).
• Wide Temperature & Long Life — Operating temperature range from −55 °C to +125 °C with a 3000-hour endurance rating at 125 °C.
• SMD Package & Compact Size — Radial, can-style SMD package with dimensions approximately φ10 × 12.4 mm (L: 1.24 cm × D: 1.00 cm) for space-constrained board designs.
• Production-Ready Packaging — Supplied in embossed carrier tape with moisture-proof packing and listed as mass production status for supply continuity.
• Regulatory — RoHS compliant.

Typical Applications

• General-purpose power filtering — Bulk smoothing and decoupling where 390 µF and low ESR reduce voltage ripple in compact SMD layouts.
• High-frequency power circuits — Supports high-frequency ripple currents (2 A at 300 kHz) for switching regulators and DC–DC converter stages.
• Temperature-challenged electronics — Rated for −55 °C to +125 °C and 3000 hours at 125 °C for designs exposed to wide temperature ranges.
• Space-constrained SMD designs — Can-style SMD package delivers high capacitance in a compact footprint for tightly packed PCBs.

Unique Advantages

• High capacitance in an SMD can — 390 µF in a φ10 × 12.4 mm SMD package enables designers to meet bulk energy storage needs without large through-hole components.
• Low ESR for efficient power delivery — 20 mΩ ESR at 100 kHz minimizes power loss and heat generation in high-current paths.
• Strong ripple current capability — Rated ripple currents (2 A at high frequency, 200 mA at low frequency) support demanding switching applications and reduce output ripple.
• Robust thermal endurance — 3000-hour life at 125 °C provides long-term stability in elevated-temperature environments.
• Production-ready packaging — Embossed carrier tape and moisture-proof packing simplify automated assembly and handling for volume manufacturing.
• Regulatory compliance — RoHS compliance supports use in regions and designs requiring restricted-substance adherence.

Why Choose RKS1D391MCNAJLGS?

The RKS1D391MCNAJLGS combines conductive polymer aluminum construction, low ESR, high ripple capability and a compact SMD can package to address demanding power-filtering and decoupling needs in general-purpose electronics. Its extended temperature range and 3000-hour endurance at 125 °C make it suitable for designs that require reliable performance over long operating periods.

Manufactured by Nichicon and delivered in production-ready embossed carrier tape with moisture-proof packing, this capacitor is positioned for engineers and procurement teams seeking a reliable, space-efficient SMD solution for medium-voltage (20 V) power subsystems and high-frequency circuits.

Request a quote or submit a pricing and availability inquiry for the RKS1D391MCNAJLGS to begin integrating this capacitor into your next design.