RNU1A821MCN1

The RNU1A821MCN1 is a conductive polymer aluminum solid electrolytic capacitor in a radial lead can from Nichicon’s RNU series. It delivers high capacitance with low equivalent series resistance and is intended for general-purpose electronic applications that require robust ripple-current handling and compact power filtering.

Designed for through-hole radial mounting, this 820 µF, 10 V polarized capacitor provides measurable advantages in high-frequency ripple performance and thermal endurance within its specified operating range.

Key Features

• High Capacitance — 820 µF nominal capacitance for bulk energy storage and smoothing in power circuits.
• Low ESR — 10 mΩ ESR measured at 20°C/100 kHz, reducing losses and internal heating under load.
• High Ripple Current — Rated ripple current of 580 mA at 120 Hz and 5.8 A at 300 kHz, supporting both low- and high-frequency power applications.
• Dielectric Loss — tanδ = 0.08 (20°C, 120 Hz), supporting stable AC performance.
• Temperature & Endurance — Operating range −55°C to +105°C with a rated life of 2000 hours at 105°C.
• Radial Lead Package — Compact φ8 × 11.5 mm can with 3.5 mm lead spacing for through-hole mounting; available in bulk or bag packing (no terminal forming).
• Leakage Current — Specified leakage current of 1640 µA (measured after 2 minutes at 20°C under rated voltage).
• Regulatory — RoHS compliant.

Typical Applications

• General-Purpose Electronics — Suitable for circuits that require reliable bulk capacitance and low-loss performance in a compact radial-lead form.
• Power Supply Filtering — Low ESR and high ripple-current capability make it suitable for smoothing and decoupling on DC power rails operating up to 10 V.
• High-Frequency Power Circuits — Rated ripple current up to 5.8 A at 300 kHz supports applications with significant high-frequency ripple components.

Unique Advantages

• Significant energy storage in a small can — 820 µF in a φ8 × 11.5 mm package provides compact bulk capacitance for space-constrained designs.
• Reduced power loss — 10 mΩ ESR at 100 kHz minimizes I²R losses and helps control self-heating under ripple stress.
• Broad ripple handling — Specified ripple ratings at 120 Hz and 300 kHz give designers quantifiable performance across frequency ranges.
• Robust thermal endurance — 2000 hours at 105°C rating supports reliable operation in elevated-temperature environments.
• Lead-free solder compatibility — Radial lead type accommodates lead-free flow soldering conditions as specified for the series.
• Regulatory alignment — RoHS compliance supports environmental requirements for modern assemblies.

Why Choose RNU1A821MCN1?

The RNU1A821MCN1 combines high capacitance, low ESR, and strong ripple-current capability in a compact radial-lead can, making it a practical choice for designers seeking reliable bulk and decoupling capacitance for general-purpose electronic designs. Its specified endurance at 105°C and RoHS compliance align it with applications that demand thermal robustness and regulatory conformity.

As part of Nichicon’s RNU series and available in mass production packaging, the RNU1A821MCN1 is positioned for use where measurable performance (capacitance, ESR, ripple current, and temperature life) is required in a through-hole format.

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