RS81C331MCNASQ

The RS81C331MCNASQ is a conductive polymer aluminum solid electrolytic capacitor in a low‑profile radial lead can (φ6.3×8 mm) designed for general‑purpose electronic applications. It delivers high ripple handling and low equivalent series resistance (ESR) in a compact through‑hole form factor, suited to space‑constrained power stages and board‑level decoupling.

Key Features

• Conductive polymer construction — Solid polymer electrolyte provides stable performance and enhanced ripple current capability compared with conventional electrolytes.
• Capacitance and tolerance — 330 µF with ±20% tolerance at 120 Hz, 20°C for predictable bulk energy storage and decoupling.
• Rated voltage — 16 V working voltage for low‑voltage power rails.
• Low ESR — 12 mΩ measured at 20°C/100 kHz, enabling low loss and improved efficiency in high‑frequency circuits.
• High ripple current — 468 mA at 120 Hz and 4.68 A at 300 kHz (frequency coefficient applied), supporting demanding switching and high‑frequency loads.
• Long endurance — 5000 hours rated life at 105°C, designed for sustained operation in elevated ambient conditions.
• Wide operating temperature — −55°C to +105°C for use across a broad range of environments.
• Low profile radial package — φ6.3×8 mm can with 2.5 mm lead spacing (±0.5 mm) for compact through‑hole layouts and manual or wave solder assembly; available in bulk/bag packing.
• Loss tangent (tan δ) — 0.1 at 20°C/120 Hz for controlled dissipation characteristics.
• RoHS compliant & mass production — Material compliance and production status suitable for volume designs.

Typical Applications

• Power supply filtering — Bulk smoothing and post‑regulator decoupling where low ESR and high ripple capability improve transient response and reduce losses.
• Switching regulator output — Supports high ripple currents at high frequency, making it suitable for DC‑DC converter outputs in compact assemblies.
• General-purpose electronic equipment — Through‑hole radial mounting for serviceable boards and mixed technology PCBs requiring reliable bulk capacitance.

Unique Advantages

• Compact, low‑profile package: φ6.3×8 mm size provides substantial capacitance in a small through‑hole footprint for space‑constrained designs.
• Low ESR at high frequency: 12 mΩ at 100 kHz reduces conduction losses and heating in high‑frequency circuits.
• High ripple handling: Rated ripple currents of 468 mA (120 Hz) and 4.68 A (300 kHz) enable use on aggressive switching outputs and high‑frequency power rails.
• Extended thermal endurance: 5000 hours at 105°C supports long service life in elevated temperature environments.
• Radial lead format and packaging options: 2.5 mm lead spacing and bulk/bag packing simplify integration into through‑hole assemblies and prototyping.
• Predictable dissipation: tan δ = 0.1 at 20°C/120 Hz for consistent loss behavior in design calculations.

Why Choose RS81C331MCNASQ?

RS81C331MCNASQ combines conductive polymer performance with a compact radial lead can to deliver reliable bulk capacitance, low ESR, and high ripple capability for general‑purpose electronics. Its 16 V rating, wide −55°C to +105°C operating range, and 5000‑hour endurance at 105°C make it suitable for designers who need durable, low‑loss decoupling and smoothing in space‑limited through‑hole assemblies.

This part is appropriate for engineers and purchasing teams specifying capacitors for compact power modules, switching regulator outputs, and general board‑level power filtering where long life and high ripple handling are required.

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