RNU1E221MDNASQ

The RNU1E221MDNASQ is a conductive polymer aluminum solid electrolytic capacitor in Nichicon’s RNU series, delivering high capacitance with low equivalent series resistance (ESR) in a radial lead can. It targets general-purpose electronic designs and systems that require stable performance across a wide temperature range and extended high-temperature lifetime.

Key value comes from a combination of 220 µF capacitance at 25 V, low ESR measured at 100 kHz, and high ripple current capability—enabling reduced heating and improved stability in demanding operating conditions up to 105 °C.

Key Features

• High Capacitance — 220 µF rated capacitance at 25 V with tolerance of −20% to +20% for bulk energy storage and decoupling in compact assemblies.
• Low ESR — 16 mΩ measured at 100 kHz (20 °C), lowering internal losses and improving transient response.
• High Ripple Current — Rated for 465 mA at 120 Hz and 4.65 A at 300 kHz, enabling effective ripple handling across low- and high-frequency regimes.
• Extended High‑Temperature Lifetime — Rated for 5000 hours at 105 °C for sustained operation in elevated-temperature environments.
• Radial Lead Package — Radial can construction with 3.5 mm lead spacing and compact dimensions (L: 1.15 × D: 0.8 cm) for through‑hole mounting.
• Wide Operating Temperature — Specified performance from −55 °C to +105 °C for versatile deployment across temperature extremes.
• Polarized — Designed as a polarized electrolytic capacitor for appropriate DC applications.
• RoHS Compliant — Conforms to RoHS directive (2011/65/EU, (EU) 2015/863).

Typical Applications

• General-Purpose Electronic Circuits — Suitable where a 220 µF / 25 V polarized capacitor with low ESR and compact radial packaging is required.
• High‑Temperature Systems — Intended for designs that operate up to 105 °C and benefit from a 5000-hour lifetime rating at that temperature.
• Ripple-Intensive Power Sections — Used in power rails and filtering stages that demand high ripple current capability at both low and high frequencies.

Unique Advantages

• Reduced Power Losses: Low ESR (16 mΩ at 100 kHz) minimizes heat generation and improves efficiency in high-frequency conditions.
• Robust Ripple Handling: High ripple ratings (465 mA at 120 Hz; 4.65 A at 300 kHz) help maintain stable voltage under dynamic load currents.
• Compact Through‑Hole Format: Radial can with 3.5 mm lead spacing and a 1.15 × 0.8 cm footprint simplifies PCB layout for through‑hole assemblies.
• Long-Term High‑Temperature Reliability: 5000-hour endurance at 105 °C supports extended service life in elevated-temperature environments.
• Regulatory Compliance: RoHS conformity ensures material compliance with current restricted substances directives.

Why Choose RNU1E221MDNASQ?

RNU1E221MDNASQ combines the electrical advantages of conductive polymer aluminum solid electrolytic technology—high capacitance, low ESR, and strong ripple current capability—with a compact radial lead package and extended high-temperature lifetime. These attributes make it a practical choice for engineers specifying reliable bulk capacitance in general-purpose and elevated-temperature applications.

As part of Nichicon’s RNU series, this part is positioned for designs that require measurable performance tied to documented specifications (220 µF, 25 V, 16 mΩ ESR at 100 kHz, −55 °C to 105 °C operating range, and 5000 h lifetime at 105 °C), enabling straightforward selection for production and maintenance planning.

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