RS81C331MDNASQ

The RS81C331MDNASQ is a Nichicon RS8-series conductive polymer aluminum solid electrolytic capacitor in a radial-lead, low-profile can (φ6.3 × 8 mm). It provides 330 µF capacitance at a 16 V rating with low ESR and high ripple-current capability for general-purpose power applications.

Designed for compact, high-ripple environments, this component delivers a combination of low equivalent series resistance, wide operating temperature range (−55 °C to 105 °C) and long endurance (5,000 hours at 105 °C), making it suitable where space, thermal robustness and ripple handling matter.

Key Features

• Capacitance & Voltage — 330 µF nominal capacitance at a 16 V rated voltage with capacitance tolerance −20% to 20% (measured at 120 Hz, 20 °C).
• Low ESR — ESR of 12 mΩ measured at 20 °C / 100 kHz, supporting efficient power delivery and reduced loss in high-frequency circuits.
• High Ripple Current — Rated ripple current: 468 mA at 120 Hz (low frequency) and 4.68 A at 300 kHz (high frequency), enabling robust performance in switching and high-frequency power stages.
• Dielectric Loss (tan δ) — tan δ ≤ 0.10 at 20 °C, 120 Hz, supporting stable AC performance and predictable loss characteristics.
• Leakage Current — Specified leakage current of 1,584 µA (after 2 minutes at 20 °C), useful for budgeting standby currents and startup behavior.
• Temperature & Endurance — Operating range −55 °C to 105 °C with a rated life of 5,000 hours at 105 °C, suitable for sustained operation in elevated-temperature environments.
• Package & Mechanical — Low-profile radial can, dimension φ6.3 × 8 mm, lead spacing 2.5 mm (tolerance ±0.5 mm); available in bulk (no terminal forming) or bag packing for flexible assembly handling.
• Compliance — RoHS compliant.

Typical Applications

• General-purpose power circuits — Compact decoupling and bulk storage where a 16 V, 330 µF low-ESR capacitor is required.
• High-frequency switching stages — Supports switching regulators and DC–DC converter outputs with high-frequency ripple current rating (4.68 A at 300 kHz).
• Space-constrained designs — Low-profile φ6.3 × 8 mm package for applications needing small footprint and height with reliable capacitance.

Unique Advantages

• High ripple-current capability: 4.68 A at 300 kHz and 468 mA at 120 Hz lets designers handle demanding switching and filtering loads without excessive heating.
• Low ESR for efficiency: 12 mΩ ESR at 100 kHz reduces I²R losses and improves voltage stability under dynamic loads.
• Robust thermal endurance: Rated for 5,000 hours at 105 °C and a wide −55 °C to 105 °C operating range for long-term reliability in elevated temperatures.
• Compact, leaded form-factor: φ6.3 × 8 mm radial can with 2.5 mm lead spacing provides a small, solder-friendly footprint for through-hole assemblies.
• Predictable AC performance: tan δ ≤ 0.10 (20 °C, 120 Hz) and specified leakage current enable accurate design margins for power budgets and thermal modeling.
• Supply flexibility: Available in bulk or bag packing to accommodate prototyping and production volumes.

Why Choose RS81C331MDNASQ?

The RS81C331MDNASQ positions itself as a compact, high-performance conductive polymer aluminum capacitor for general-purpose power applications requiring low ESR, strong ripple-current handling and thermal endurance. Its combination of 330 µF/16 V rating, low-profile radial package (φ6.3 × 8 mm) and 5,000-hour life at 105 °C makes it suitable for designs where space and long-term reliability are priorities.

Engineers specifying this part benefit from quantifiable electrical characteristics—12 mΩ ESR at 100 kHz, 4.68 A high-frequency ripple rating, defined leakage current and a broad operating temperature window—helping to simplify BOM decisions for compact power delivery and filtering subsystems.

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