RNU0J122MDN1

The RNU0J122MDN1 is a radial-lead conductive polymer aluminum electrolytic capacitor offering 1200 µF capacitance at a 6.3 V rating. It combines low ESR and high ripple-current capability in a compact φ8 × 11.5 mm can for general-purpose power-electronics use.

Designed for applications that require high capacitance density, low losses and thermal endurance, this component targets power-supply filtering, decoupling and bulk energy-storage functions in industrial and electronics equipment operating from –55 °C to +105 °C.

Key Features

• Core Technology  Conductive polymer aluminum solid electrolytic construction for stable electrical performance and low loss.
• High Capacitance  1.2 mF (1200 µF) nominal capacitance with ±20% tolerance at 120 Hz, 20 °C for bulk energy storage and decoupling.
• Low ESR & High Ripple Handling  ESR of 9 mΩ measured at 20 °C / 100 kHz and rated ripple-current capability up to 6.1 A at high frequency (300 kHz), with 610 mA at 120 Hz for low-frequency conditions.
• Loss Characteristics  tanδ = 0.08 (measured at 20 °C, 120 Hz, rated voltage) for predictable AC behavior in filtering applications.
• Reliability & Life  Endurance specified to 2000 hours at 105 °C under rated voltage, with defined limits for capacitance change, tanδ and ESR after life test.
• Package & Mounting  Radial lead can (φ8 × 11.5 mm) with 3.5 mm lead spacing (±0.5 mm tolerance); supplied bulk (no terminal forming) or bag packing.
• Leakage Current & Measurement  Leakage current 1512 µA (measured after application of rated voltage per datasheet conditioning).
• Regulatory  RoHS compliant.

Typical Applications

• Power Supply Filtering  Low ESR and high ripple-current capability make it suitable for smoothing and bulk filtering on DC power rails.
• DC–DC Converter Decoupling  Compact high capacitance supports decoupling near switching regulators where high ripple currents and low impedance are required.
• Energy Storage & Hold-Up  Useful for short-term energy hold-up and bulk storage in small form-factor power modules.

Unique Advantages

• High ripple-current tolerance: Rated for up to 6.1 A (high frequency) and 610 mA (120 Hz), enabling robust filtering under dynamic load conditions.
• Very low ESR: 9 mΩ at 20 °C / 100 kHz reduces I²R losses and improves converter efficiency and thermal performance.
• Compact high-capacitance package: 1200 µF in a φ8 × 11.5 mm can conserves PCB area while delivering bulk capacitance.
• Thermal endurance: 2000 hours at 105 °C life rating supports designs exposed to elevated operating temperatures.
• Radial-lead format and packaging options: Through-hole mounting with standard 3.5 mm lead spacing and bulk/bag packing simplifies assembly and prototyping workflows.
• RoHS compliant: Meets environmental directives for lead-free manufacturing processes.

Why Choose RNU0J122MDN1?

The RNU0J122MDN1 positions itself as a compact, high-capacitance solution for power-electronics designs that demand low ESR and substantial ripple-current capability. Its conductive-polymer construction and defined endurance at 105 °C provide predictable electrical behavior and lifecycle characteristics for robust system-level filtering and energy-storage tasks.

This capacitor is well suited for engineers and procurement teams designing converters, power-supply modules and compact systems where board space is limited but high capacitance and thermal reliability are required. Its radial-lead format and packaging choices simplify integration and handling in production and prototype environments.

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