RNU1E391MDN1

The RNU1E391MDN1 is a conductive polymer aluminum solid electrolytic capacitor in a radial can package designed for general-purpose electronic applications. It delivers high capacitance (390 µF) with low equivalent series resistance (14 mΩ at 100 kHz) and supports high ripple currents, making it suitable for demanding power-filtering and decoupling needs within its operating limits.

Packaged for radial-lead mounting and compatible with lead-free flow soldering conditions, this RoHS‑compliant capacitor is specified for operation from −55 °C to +105 °C and a rated voltage of 25 V.

Key Features

• Core Electrical Performance — 390 µF capacitance at 25 V rating with ±20% tolerance, providing substantial bulk energy storage for power rails.
• Low ESR — 14 mΩ ESR measured at 100 kHz (20 °C), reducing losses and improving voltage stability under transient loads.
• High Ripple Current Capability — Rated ripple current up to 5 A at 300 kHz and 500 mA at 120 Hz, with frequency coefficients indicating full-rated ripple support at 100 kHz and 300 kHz.
• Temperature and Lifetime — Specified operating range −55 °C to +105 °C and a load life of 2000 hours at 105 °C, supporting sustained operation in elevated-temperature environments.
• Package & Mounting — Radial lead, can-style package with 5 mm lead spacing for through-hole or radial mounting; leads and body designed for lead-free flow soldering compliance.
• Environmental Compliance — Compliant with the RoHS directive (2011/65/EU, (EU) 2015/863).

Typical Applications

• General-purpose power filtering — Bulk capacitance and low ESR make this capacitor suitable for smoothing and filtering on DC power rails in general-purpose electronics.
• Decoupling and transient support — High ripple-current rating and low ESR help maintain voltage stability during fast load transients.
• Power supply modules — Compact radial-can form factor and 25 V rating support use in small power conversion and regulation circuits.

Unique Advantages

• High stored energy in a compact package — 390 µF in a 1.25 × 1.0 cm footprint provides significant capacitance where board space is limited.
• Efficient thermal and AC performance — Low ESR at 100 kHz reduces heat generation and improves AC performance under ripple loads.
• Robust ripple handling — Rated ripple currents up to 5 A at high frequencies enable reliable performance in switching and high-frequency power systems.
• Designed for higher-temperature operation — Specified for −55 °C to +105 °C and a 2000-hour life at 105 °C for predictable long-term performance under heat stress.
• Manufacturing-friendly leaded package — Radial leads with 5 mm spacing and lead-free flow soldering correspondence streamline through-hole assembly processes.
• Regulatory compliance — RoHS conformity supports use in designs requiring restricted-substance compliance.

Why Choose RNU1E391MDN1?

The RNU1E391MDN1 combines high capacitance, low ESR, and rated high-frequency ripple capability in a compact radial-can package, making it a practical choice for designers seeking reliable bulk and decoupling capacitance in general-purpose electronic designs. Its specified temperature range and load-life rating provide designers with verifiable performance for applications exposed to elevated temperatures.

This part is well suited for engineers and procurement teams specifying through-hole radial capacitors where measurable low ESR, substantial ripple handling, and RoHS compliance are required. The RNU series’ published performance characteristics enable straightforward integration and predictable behavior in qualifying designs.

For pricing, availability, or to request a quote for RNU1E391MDN1, please submit your request and our team will respond with details to support your design needs.