RNU0J681MCN1

The RNU0J681MCN1 is a conductive polymer aluminum solid electrolytic capacitor from Nichicon’s RNU series. It delivers 680 µF at a 6.3 V rating in a compact radial-lead can (φ8×11.5 mm) designed for general-purpose electronic designs.

Engineered for high ripple capability and low equivalent series resistance, this part targets applications that require stable capacitance, high-frequency performance, and endurance up to 2000 hours at 105°C.

Key Features

• Electrical Performance — 680 µF capacitance with tolerance ±20% and a rated voltage of 6.3 V, suitable for circuits requiring substantial bulk capacitance in a small footprint.
• Low ESR & High Ripple Capability — ESR of 7 mΩ measured at 20°C/100 kHz and rated ripple currents of 570 mA at 120 Hz and 5.7 A at 300 kHz, enabling effective high-frequency smoothing and ripple handling.
• Conductive Polymer Dielectric — Solid conductive polymer construction for reduced loss (tanδ 0.08 at 20°C/120 Hz) and reliable electrical behavior under load.
• Thermal & Lifetime Specifications — Rated to operate from −55°C to 105°C with a life/endurance rating of 2000 hours at 105°C, supporting sustained operation in elevated-temperature environments.
• Form Factor & Mounting — Radial lead, can-style package (φ8×11.5 mm) with 3.5 mm lead spacing (±0.5 mm); available bulk or bag packing for standard assembly workflows.
• Leakage Current — Specified leakage current of 856 µA (measured after 2 minutes at 20°C), allowing designers to budget for standby losses in low-voltage circuits.
• RoHS Compliance — Compliant with RoHS directives as noted in product documentation.

Typical Applications

• General-purpose power circuits — Provides bulk capacitance and smoothing for low-voltage power rails where 6.3 V rating and 680 µF are required.
• High-frequency decoupling — Low ESR and specified ripple current at high frequency make it suitable for decoupling around switching regulators and power rails.
• Embedded and consumer electronics — Compact radial-lead package supports space-constrained boards that still require high capacitance and thermal endurance.

Unique Advantages

• High ripple handling: Rated ripple currents up to 5.7 A at 300 kHz and 570 mA at 120 Hz reduce heating and improve reliability in ripple-loaded circuits.
• Very low ESR: 7 mΩ (20°C/100 kHz) lowers voltage drop and power dissipation, improving regulator stability and transient response.
• Solid polymer construction: Conductive polymer dielectric delivers low loss (tanδ 0.08 at 120 Hz) and consistent performance across temperature.
• Compact radial package: φ8×11.5 mm can with 3.5 mm lead spacing provides a small PCB footprint while remaining through-hole mountable for robust mechanical connection.
• High-temperature endurance: 2000 hours at 105°C supports long-term operation in elevated-temperature environments.

Why Choose RNU0J681MCN1?

RNU0J681MCN1 combines high capacitance density with the electrical advantages of conductive polymer technology—low ESR, controlled loss (tanδ), and strong ripple current capability—making it well suited for designs that demand compact, reliable energy storage at low voltages. The radial-lead can and specified lead spacing simplify through-hole assembly while the 2000-hour endurance at 105°C provides predictability for thermal-stressed designs.

This part is appropriate for engineers and procurement teams specifying general-purpose capacitors for embedded, power-supply, and consumer-electronics applications where measurable low ESR, defined ripple ratings, and RoHS compliance are important selection criteria.

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