RNU1H390MDN1

The RNU1H390MDN1 is a conductive polymer aluminum solid electrolytic capacitor in a radial lead can package. It delivers 39 µF capacitance at a 50 V rating with low ESR and high ripple current capability, designed for general‑purpose electronic applications that require stable decoupling and filtering over a wide temperature range.

Built for reliability in compact assemblies, this radial lead device offers 2000 hours of endurance at 105°C and is RoHS compliant, making it suitable for production deployments where space‑efficient, high‑performance bulk capacitance is required.

Key Features

• Conductive polymer solid electrolytic Provides low ESR and high ripple capability compared to conventional electrolytics, improving power delivery stability.
• Electrical characteristics 39 µF nominal capacitance with ±20% tolerance and a dissipation factor (tanδ) of 0.12 measured at 20°C, 120 Hz.
• High frequency performance ESR of 25 mΩ measured at 20°C/100 kHz and rated ripple currents of 240 mA at 120 Hz and 2.4 A at 300 kHz support effective AC ripple handling across low and high frequencies.
• Voltage rating 50 V rated voltage suitable for a range of mid‑voltage power rails.
• Thermal and lifecycle Operating temperature range from −55°C to 105°C with a rated life of 2000 hours at 105°C under rated voltage.
• Package and mounting Radial lead can, size φ8 × 11.5 mm, lead spacing 3.5 mm (±0.5 mm), supplied in bulk or bag packing for PCB insertion processes.
• Leakage current Maximum leakage current of 390 µA (measured after 2 minutes at 20°C), for predictable quiescent behavior.
• Environmental compliance RoHS compliant.

Typical Applications

• General‑purpose power filtering Uses the 39 µF/50 V rating and low ESR to stabilize mid‑voltage rails and smooth supply ripple in compact assemblies.
• Decoupling on high‑frequency circuits Low ESR at 100 kHz and high ripple current capability help maintain voltage integrity where fast switching generates AC content.
• Compact electronic modules The φ8 × 11.5 mm radial can and standard lead spacing support dense PCB layouts while providing reliable bulk capacitance.

Unique Advantages

• Low ESR for improved efficiency: 25 mΩ at 20°C/100 kHz reduces loss and heat generation in power paths.
• High ripple capability across frequencies: Rated ripple current specified at both 120 Hz (240 mA) and 300 kHz (2.4 A) for versatile AC handling.
• Stable performance over temperature: Operates from −55°C to 105°C with a 2000 h life at 105°C, supporting reliable long‑term operation.
• Predictable leakage behavior: 390 µA leakage current rating after standard conditioning gives designers measurable standby characteristics.
• Manufacturing friendly packaging: Supplied in bulk or bag packing and offered in a radial lead can for straightforward through‑hole assembly.
• Regulatory compliance: RoHS compliance supports deployment in RoHS‑restricted markets.

Why Choose RNU1H390MDN1?

The RNU1H390MDN1 combines conductive polymer solid electrolyte construction with a compact radial can to deliver a reliable 39 µF, 50 V solution with low ESR and substantial ripple handling across both low and high frequencies. Its temperature range (−55°C to 105°C) and 2000‑hour endurance at 105°C make it appropriate for production designs that require predictable long‑term capacitance and leakage characteristics.

This part is well suited to engineers and procurement teams seeking a general‑purpose, high‑performance electrolytic capacitor for power filtering and decoupling in compact assemblies, with the traceable specifications and RoHS compliance needed for volume production.

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