RNU1E391MDNASQ

The RNU1E391MDNASQ is a conductive polymer aluminum solid electrolytic capacitor in a radial lead can package, offering 390 µF capacitance at a 25 V rating. Designed for general-purpose board-level use, it combines low ESR and high ripple-current capability in a compact φ10 × 12.5 mm body.

Key strengths include low equivalent series resistance, a wide operating temperature range from −55°C to 105°C, and a 5000-hour endurance at 105°C, making it suitable for designs that require stable power decoupling and bulk capacitance with robust thermal performance.

Key Features

• Capacitance & Voltage: 390 µF rated capacitance with a 25 V rated voltage and ±20% tolerance (at 120 Hz, 20°C).
• Conductive Polymer Electrolyte: Solid polymer construction for stable electrical characteristics and long endurance.
• Low ESR: 14 mΩ equivalent series resistance (measured at 20°C/100 kHz) to minimize losses at high frequency.
• High Ripple Current Capability: Rated for 500 mA low-frequency ripple (120 Hz) and 5 A high-frequency ripple (300 kHz); supports high-frequency operation per datasheet frequency coefficients.
• Leakage Current Specification: 1950 µA leakage current (measured in accordance with the series datasheet conditions — after 2 minutes' application of rated voltage at 20°C).
• Endurance & Temperature Range: 5000 hours load life at 105°C and an operating temperature range of −55°C to 105°C.
• Package & Mounting: Radial lead, φ10 × 12.5 mm can with 5 mm lead spacing (±0.5 mm). Supplied in bulk/no terminal forming with bag packing; mass production status.
• Compliance: RoHS compliant.

Typical Applications

• General Purpose Electronics — A mid-value capacitance option for board-level power applications that require a 390 µF, 25 V conductive polymer aluminum capacitor.
• Power Supply Modules — Provides low ESR and high ripple handling for local energy storage and smoothing in modular power designs.
• High-Frequency Filtering — Low ESR at 100 kHz and rated high-frequency ripple performance suit applications with significant high-frequency switching components.

Unique Advantages

• Low ESR for Reduced Losses: 14 mΩ (20°C/100 kHz) ESR minimizes I²R losses and supports efficient operation in high-frequency circuits.
• High Ripple Capability: Rated ripple currents of 500 mA (120 Hz) and 5 A (300 kHz) allow the capacitor to handle both low- and high-frequency ripple stresses.
• Thermal Endurance: 5000-hour load life at 105°C provides predictable performance over extended high-temperature operation.
• Compact, Board-Ready Package: φ10 × 12.5 mm radial can with 5 mm lead spacing offers a small footprint for through-hole designs while preserving substantial capacitance.
• Production-Ready Supply: Mass production status and bag packing/bulk options simplify procurement and assembly logistics.
• Regulatory Compliance: RoHS compliant for use in environmentally regulated markets.

Why Choose RNU1E391MDNASQ?

The RNU1E391MDNASQ positions itself as a robust, general-purpose conductive polymer aluminum capacitor that balances high capacitance with low ESR and substantial ripple-current capability. Its 25 V rating, compact radial can package, and 5000-hour endurance at 105°C make it suitable for designers seeking reliable board-level energy storage and filtering in demanding thermal environments.

This part is ideal for engineers and purchasers working on mid-voltage power modules, high-frequency filtering stages, and general-purpose electronics where a proven, mass-production-ready conductive polymer aluminum capacitor is required. The combination of measured ESR, specified ripple currents, and RoHS compliance provides clear, verifiable criteria for selection and long-term use.

If you would like pricing, lead-time, or to request a formal quote for RNU1E391MDNASQ, please submit a quote request or sales inquiry mentioning the part number and desired quantity.