RNU1D681MDN1

The RNU1D681MDN1 is a radial-lead conductive polymer aluminum electrolytic capacitor in the Nichicon RNU series, offering 680 µF capacitance at a 20 V rating. It combines high capacitance in a compact φ10 × 12.5 mm can with low ESR and high ripple current capability for general-purpose power applications.

Designed for elevated-temperature operation, the device is rated for −55 °C to 105 °C with a 2000-hour endurance at 105 °C, and is available in bulk or bag packaging for production use. The part is RoHS compliant and in mass production.

Key Features

• Capacitance & Voltage – 680 µF rated capacitance with a 20 V rating and tolerance of −20% to +20% (measured at 120 Hz, 20 °C).
• Conductive Polymer Electrolyte – Solid conductive polymer construction provides low equivalent series resistance (ESR) and stable performance at high frequency.
• Low ESR – ESR of 12 mΩ measured at 20 °C / 100 kHz, enabling effective high-frequency decoupling and low-loss power delivery.
• High Ripple Current – Rated ripple current of 540 mA at 120 Hz and 5.4 A at 300 kHz for handling both low- and high-frequency ripple components.
• Wide Temperature & Endurance – Operating range from −55 °C to 105 °C with a rated life/endurance of 2000 hours at 105 °C.
• Compact Radial Package – φ10 × 12.5 mm can with 5.0 mm lead spacing (±0.5 mm) for through-hole mounting and straightforward board placement.
• Leakage & Dissipation – Leakage current of 2720 µA (after 2 minutes at 20 °C) and tangent of loss angle (tan δ) of 0.12 measured at 20 °C, 120 Hz, 20 V.
• Production-ready – Available in bulk (no terminal forming) or bag packing and currently in mass production; RoHS compliant.

Typical Applications

• General-purpose power filtering – Bulk capacitance and low ESR make the part suitable for smoothing and filtering on power rails in a wide range of electronic equipment.
• High-frequency decoupling – Rated high-frequency ripple current (5.4 A at 300 kHz) supports decoupling in switching power supplies and high-speed power stages.
• Embedded and industrial electronics – Compact radial package and wide temperature range support use in control boards, instrumentation, and industrial power modules.

Unique Advantages

• Low-loss power handling: 12 mΩ ESR at 100 kHz reduces heat generation and improves efficiency in high-frequency circuits.
• Broad ripple capability: High rated ripple currents at both low and high frequencies allow a single component to address multiple ripple sources.
• Thermal robustness: −55 °C to 105 °C operating range and 2000-hour endurance at 105 °C support reliable operation in elevated-temperature environments.
• Space-efficient form factor: φ10 × 12.5 mm radial can provides high capacitance in a small footprint for through-hole designs.
• Production-friendly supply: Mass production status and bulk/bag packaging options ease procurement and assembly for volume designs.
• Standards compliance: RoHS compliance aligns with environmental requirements for commercial and industrial products.

Why Choose RNU1D681MDN1?

RNU1D681MDN1 positions itself as a compact, high-capacitance conductive polymer electrolytic capacitor engineered for applications requiring low ESR, strong ripple-current capability, and reliable operation across a wide temperature range. Its combination of 680 µF at 20 V, low ESR (12 mΩ at 100 kHz), and high-frequency ripple handling makes it suitable for designers seeking a robust through-hole capacitor for power conditioning and decoupling.

This part is well suited to engineers and buyers building general-purpose power systems, embedded controllers, and industrial electronics that demand thermal endurance, predictable electrical performance, and production-ready availability.

Request a quote or submit a product inquiry to receive pricing, availability, and additional procurement details for the RNU1D681MDN1.