RNU1D391MDNASQ

The RNU1D391MDNASQ is a Nichicon conductive polymer aluminum solid electrolytic capacitor in a radial-lead can package. It delivers 390 µF capacitance at a 20 V rating with a polarized design and ±20% tolerance, optimized for general-purpose electronic applications requiring compact, high-capacitance components.

Key electrical characteristics include low ESR (14 mΩ at 20°C / 100 kHz), high ripple current capability (497 mA at 120 Hz and 4.97 A at 300 kHz), and a long endurance of 5000 hours at 105°C. The part is RoHS compliant and available in mass production with bulk bag packing.

Key Features

• Capacitance & Voltage — 390 µF nominal capacitance with a 20 V rated voltage and ±20% tolerance, suitable where high bulk capacitance is required in a compact radial package.
• Conductive Polymer Construction — Solid polymer electrolyte provides stable electrical characteristics including a measured tanδ of 0.12 at 20°C/120 Hz and predictable performance across frequency.
• Low ESR — 14 mΩ ESR measured at 20°C/100 kHz, contributing to efficient power delivery and reduced heat generation under AC stress.
• High Ripple Current Capability — Rated ripple currents of 497 mA at 120 Hz and 4.97 A at 300 kHz support demanding AC and switching environments.
• Temperature & Endurance — Operating range from −55°C to 105°C with a rated life of 5000 hours at 105°C, designed for long-term thermal stability.
• Compact Radial Package — φ8 × 11.5 mm can size with 3.5 mm lead spacing (±0.5 mm) and radial lead mounting for through-hole assembly and straightforward mechanical retention.
• Leakage Current Specified — Leakage current listed at 1560 µA (measured after 2 minutes at 20°C), allowing designers to account for standby and bias currents in system budgets.
• RoHS Compliant & Mass Production — Meets RoHS requirements and is available in bulk bag packing for production runs.

Typical Applications

• General Purpose Electronics — Use where a polarized, high-capacitance radial electrolytic is required for energy storage or bulk decoupling in assembled boards.
• Power Filtering and Decoupling — Suitable for smoothing and decoupling in circuits that benefit from low ESR and elevated ripple-current capability.
• Industrial and Instrumentation Equipment — Applicable in equipment requiring wide operating temperatures (−55°C to 105°C) and extended endurance at elevated temperature.

Unique Advantages

• High effective capacitance in a small footprint: 390 µF in a φ8 × 11.5 mm can supports compact board layouts without sacrificing bulk capacitance.
• Improved thermal and ripple performance: 14 mΩ ESR and up to 4.97 A ripple rating at high frequency reduce thermal stress under switching conditions.
• Long endurance at elevated temperature: 5000 hours life at 105°C provides predictable long-term performance in thermally demanding environments.
• Radial lead convenience: 3.5 mm lead spacing and through-hole mounting simplify prototyping and mechanical assembly in panel or board-level applications.
• Manufacturer availability: Nichicon mass-production status and RoHS compliance support volume sourcing and regulatory requirements.

Why Choose RNU1D391MDNASQ?

The RNU1D391MDNASQ combines conductive polymer aluminum chemistry with a compact radial can to deliver 390 µF at 20 V with low ESR and strong ripple-current handling. Its specified electrical parameters—tanδ, ESR, leakage current, and ripple ratings—allow engineers to design predictable power-management and decoupling solutions while accounting for thermal and lifetime constraints.

This part is well suited for teams and projects that need a reliable, production-ready polarized capacitor with defined endurance (5000 hours at 105°C), RoHS compliance, and straightforward through-hole assembly. Choose this Nichicon RNU part when you need a documented balance of capacitance, low impedance, and long-term thermal performance in a compact radial package.

To request a quote or submit inquiries about availability, lead times, or ordering for RNU1D391MDNASQ, please contact sales or request a quote through your preferred procurement channel.