RKS1D390MCNAFEGS

The RKS1D390MCNAFEGS is a surface-mount conductive polymer aluminum solid electrolytic capacitor with 39 µF capacitance and a 20 V rated voltage. It delivers low ESR and high allowable ripple current in a compact φ6.3 × 5.8 mm SMD can, designed for demanding high-temperature and high-frequency power applications.

Engineered for long-term reliability, this part offers a wide operating temperature range from −55°C to 125°C and a rated load life of 3000 hours at 125°C, making it suitable for compact power modules and high-temperature electronics that require stable capacitance and low loss.

Key Features

• Capacitance & Voltage — 39 µF capacitance at a rated voltage of 20 V with tolerance −20% to +20%.
• Conductive Polymer Electrolyte — Solid conductive polymer construction for low loss (tanδ 0.12 at 20°C, 120 Hz) and stable performance.
• Low ESR & High-Frequency Performance — ESR of 50 mΩ measured at 20°C / 100 kHz and high-frequency ripple current rating of 900 mA (300 kHz) for effective HF decoupling.
• Ripple Current Handling — Low-frequency ripple current rating of 90 mA at 120 Hz for broad-spectrum ripple tolerance.
• High Temperature Endurance — Rated life of 3000 hours at 125°C with defined endurance limits for capacitance change, tanδ and ESR.
• Surface-Mount Package — Radial SMD can (φ6.3 × 5.8 mm) suitable for automated assembly; supplied in embossed carrier tape with moisture-proof packing for reflow processes.
• Leakage Current — Leakage current ≤ 100 µA after standard conditioning.
• Regulatory — RoHS compliant.

Typical Applications

• Power supply decoupling — Low ESR and high ripple-current capability make this capacitor suitable for decoupling and smoothing in compact power supplies.
• DC–DC converter output filtering — 50 mΩ ESR at 100 kHz and 900 mA HF ripple handling support stable output filtering in high-frequency converters.
• High-temperature electronics — Rated for −55°C to +125°C with a 3000-hour life at 125°C for use in elevated-temperature environments.
• Space-constrained SMD designs — Small φ6.3 × 5.8 mm SMD can and defined PCB land pattern (6.6 × 6.6 mm) for compact board layouts and automated placement.

Unique Advantages

• Low ESR for improved HF stability: 50 mΩ ESR at 100 kHz reduces voltage ripple and improves transient response in high-frequency circuits.
• High ripple-current capability: 900 mA at 300 kHz (HF) and 90 mA at 120 Hz (LF) enable robust handling of both switching and line-frequency ripple.
• Designed for elevated-temperature reliability: 3000 hours rated life at 125°C provides predictable aging and endurance for thermal-stressed applications.
• Compact SMD can with reflow compatibility: φ6.3 × 5.8 mm package and embossed tape packaging simplify pick-and-place assembly and reflow processing.
• Solid conductive polymer construction: Low tanδ (0.12 at 20°C, 120 Hz) and solid electrolyte behavior reduce AC losses and improve long-term stability.
• RoHS compliant: Meets RoHS directive requirements for restricted substances.

Why Choose RKS1D390MCNAFEGS?

The RKS1D390MCNAFEGS combines conductive polymer performance with a compact SMD can to deliver low ESR, substantial ripple-current capability, and high-temperature endurance. These characteristics make it well suited for engineers designing compact power stages, DC–DC outputs, and high-frequency decoupling networks that demand stable capacitance and predictable aging at elevated temperatures.

With embossed carrier taping, moisture-proof packing, and reflow-compatible construction, this capacitor integrates readily into automated manufacturing flows while providing long-term reliability backed by defined endurance specifications.

Request a quote or contact sales to discuss pricing, availability, and volume options for RKS1D390MCNAFEGS.