RKS1H390MCNAHJGS

The RKS1H390MCNAHJGS from Nichicon is a conductive polymer aluminum solid electrolytic, surface-mount capacitor in the RKS series. It delivers 39 µF at a 50 V rating with low ESR and high ripple handling for general-purpose electronic designs.

Designed for SMD assembly, this part combines a compact φ8 × 10 mm can-style package with embossed carrier taping and moisture-proof packing, and is specified for long life at elevated temperature (3000 hours at 125°C).

Key Features

• Capacitance & Voltage: 39 µF nominal capacitance with a 50 V rated voltage and tolerance of -20% to +20%.
• Conductive Polymer Electrolyte: Solid polymer construction for stable electrical characteristics and improved ripple performance compared to traditional liquid electrolytes.
• Low Loss / Low ESR: Tan δ of 0.12 (measured at 20°C, 120 Hz) and ESR of 30 mΩ at 20°C / 100 kHz, supporting low-loss filtering and decoupling at higher frequencies.
• High Ripple Current Capability: Low-frequency ripple current of 125 mA (120 Hz) and high-frequency ripple current of 1.25 A (300 kHz) for robust performance under AC stress.
• Wide Operating Temperature: Rated from -55°C to +125°C, with endurance specified as 3000 hours at 125°C.
• SMD Package & Assembly Ready: Radial can SMD package (φ8 × 10 mm) supplied in embossed carrier taping with moisture-proof packing; compatible with lead-free reflow up to 260°C peak per series soldering guidance.
• Leakage Current: Specified leakage current up to 100 µA, providing predictable bias behavior for system designs.
• RoHS Compliant: Conforms to RoHS directive requirements as documented for the RKS series.

Typical Applications

• General Purpose Electronics: SMD capacitor for wide-ranging electronic designs that require 39 µF at 50 V in a compact can-style package.
• High-Frequency Circuits: Low ESR and specified high-frequency ripple capability make it suitable where higher-frequency smoothing or decoupling is required.
• High-Temperature Environments: Rated to operate up to 125°C with a 3000-hour endurance specification for designs exposed to elevated ambient temperatures.
• Automated SMD Assembly: Embossed carrier taping and moisture-proof packing support automated placement and standard lead-free reflow assembly processes.

Unique Advantages

• Predictable High-Temperature Endurance: 3000 hours at 125°C specified life enables confident selection for thermally demanding designs.
• Strong High-Frequency Performance: 30 mΩ ESR at 100 kHz and 1.25 A ripple current at 300 kHz deliver effective filtering and decoupling in high-switching environments.
• Compact SMD Can Format: φ8 × 10 mm size provides high capacitance in a small footprint for space-constrained board layouts.
• Manufacturing-Ready Packaging: Supplied in embossed carrier taping with moisture-proof packing to ease handling and protect against moisture during storage and assembly.
• Stable Leakage Characteristics: Leakage current specified up to 100 µA for consistent bias behavior across assemblies.
• RoHS Compliance: Environmentally compliant for use in RoHS-regulated production environments.

Why Choose RKS1H390MCNAHJGS?

RKS1H390MCNAHJGS positions itself as a reliable, compact conductive polymer SMD capacitor for general-purpose electronics that require stable capacitance, low ESR, and high ripple capability at elevated temperatures. Its 50 V rating, tight electrical specifications, and 3000-hour endurance at 125°C make it suitable for designs demanding long-term thermal stability and predictable performance.

This part is well suited to engineers and procurement teams specifying SMD capacitors for assemblies that must balance high-frequency performance, compact size, and manufacturing readiness, while maintaining RoHS compliance and clear endurance data from the Nichicon RKS series.

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