RKS1D391MCNAHJGS

The RKS1D391MCNAHJGS is a surface-mount conductive polymer aluminum electrolytic capacitor delivering 390 µF capacitance at a 20 V rating. It is part of Nichicon's RKS series designed for applications that require high capacitance, low equivalent series resistance, and robust ripple handling in a compact SMD can package.

Engineered for general-purpose electronics, this part offers a combination of low ESR, specified ripple current performance, and extended high-temperature endurance for reliable operation across a wide temperature range.

Key Features

• Capacitance & Tolerance: 390 µF nominal with tolerance of -20% to +20% (measured at 20°C, 120 Hz).
• Rated Voltage: 20 V working voltage suitable for a wide range of low-voltage power systems.
• Low ESR: 25 mΩ equivalent series resistance measured at 20°C / 100 kHz, supporting efficient high-frequency performance.
• Ripple Current Capability: Low-frequency ripple current 170 mA (120 Hz) and high-frequency ripple current 1.7 A (300 kHz), enabling higher allowable ripple handling.
• Leakage Current: Specified leakage current of 390 µA.
• Temperature & Endurance: Operating temperature range from -55°C to +125°C with a rated load life of 3000 hours at 125°C.
• Package & Mounting: Surface-mount radial can (φ8 × 10 L) designed for embossed carrier taping with moisture-proof packing for automated assembly.
• Tangent of Loss Angle (tan δ): 0.12 at 20°C, 120 Hz, for predictable dissipation characteristics.
• RoHS Compliant: Constructed to meet RoHS requirements.
• Reflow Compatibility: SMD type rated for lead-free reflow soldering to a 260°C peak (per series soldering specifications).

Typical Applications

• Power supply filtering: Low ESR and high ripple current support effective smoothing and decoupling on DC power rails in general-purpose electronics.
• DC–DC converter output caps: High capacitance and low impedance at high frequency help stabilize converter outputs under dynamic loads.
• Bulk energy storage in compact designs: High capacitance in an SMD can package provides compact bulk storage where board space is limited.

Unique Advantages

• High ripple tolerance: Specified ripple current up to 1.7 A at 300 kHz reduces thermal stress and improves lifetime under AC loading.
• Low-loss performance: 25 mΩ ESR and tan δ of 0.12 deliver low dissipation and efficient high-frequency behavior.
• Extended high-temperature life: 3000 hours at 125°C provides predictable endurance for thermally demanding environments.
• Compact SMD can: φ8 × 10 mm package offers high capacitance density for space-constrained assemblies while supporting automated placement and embossed carrier taping.
• Assembly-ready: Moisture-proof packing and lead-free reflow compatibility streamline surface-mount processing and handling.
• Regulatory compliance: RoHS compliance simplifies material selection for regulated markets.

Why Choose RKS1D391MCNAHJGS?

The RKS1D391MCNAHJGS positions itself as a practical solution when designers need a compact, high-capacitance SMD electrolytic capacitor with low ESR and strong ripple handling. Its combination of 390 µF at 20 V, 25 mΩ ESR, and a 3000-hour life at 125°C delivers a balance of performance and longevity for general-purpose power systems and demanding thermal environments.

This part is suited to engineers and procurement looking for a reliable SMD aluminum polymer capacitor that supports automated assembly, lead-free reflow, and predictable electrical behavior across a wide operating temperature range.

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