UAS2D331MHD

The UAS2D331MHD is a Nichicon UAS-series miniature aluminum electrolytic capacitor in a radial-lead can, specified at 330 µF and 200 V. It targets general-purpose power applications that require compact high-voltage bulk capacitance with defined ripple capability and extended operating temperature range.

Designed for high-ripple environments and improved safety under abnormal voltage conditions, this mass-production part combines a compact φ18 × 40 mm package with endurance and thermal ratings that support sustained operation up to 105°C.

Key Features

• Electrical performance: 330 µF capacitance with ±20% tolerance and a rated voltage of 200 V; loss tangent (tan δ) specified at 0.15 (measured at 20°C, 120 Hz).
• Ripple handling: Low-frequency ripple current 910 mA at 120 Hz and high-frequency ripple current 1.456 A at 10 kHz, enabling reliable smoothing and filtering in high-ripple circuits.
• Leakage current: Specified leakage current of 2,740 µA (measured after 1 minute at 20°C for this part).
• Thermal and endurance: Operating temperature range −40°C to +105°C with rated endurance of 2,000 hours at 105°C under DC bias plus rated ripple current.
• Safety features: UAS-series safety design includes an improved feature for abnormally excessive voltage and a pressure relief vent that operates without dangerous conditions.
• Mechanical and mounting: Radial-lead can package, size φ18 × 40 mm, lead spacing 7.5 mm (±0.5 mm); available in bulk (no terminal forming) or bag packing.
• Compliance: RoHS compliant.

Typical Applications

• General-purpose power filtering: Bulk capacitance and specified ripple ratings make this capacitor suitable for smoothing and decoupling in power supply circuits up to 200 V.
• High-ripple DC circuits: High allowable ripple current at both low and high frequencies supports use where repeated charge/discharge cycles or switching noise are present.
• Compact high-voltage modules: The miniature φ18 × 40 mm radial package provides a space-efficient option for designs needing 200 V capacitance in a small footprint.

Unique Advantages

• High ripple capability: Clearly specified ripple current ratings (910 mA at 120 Hz; 1.456 A at 10 kHz) help designers size components for thermal and lifetime targets.
• Wide operating temperature: −40°C to +105°C range supports deployment across varied thermal environments while maintaining performance.
• Endurance-backed reliability: 2,000 hours at 105°C (with DC bias plus rated ripple) provides quantifiable lifetime expectations for designs.
• Compact, serviceable form factor: φ18 × 40 mm radial can with 7.5 mm lead spacing simplifies through-hole mounting and replacements in existing layouts.
• Safety-oriented design: Improved abnormal-voltage protection and an operational pressure relief vent mitigate risk in over-voltage conditions.
• Regulatory readiness: RoHS compliance supports environmental and supply-chain requirements.

Why Choose UAS2D331MHD?

UAS2D331MHD positions itself as a durable, compact solution for designers who need 330 µF of capacitance at 200 V with defined ripple capability and a broad −40°C to +105°C operating window. Its endurance specification and safety features provide measurable reliability for sustained DC-bias and ripple environments.

This part is well suited for engineers specifying miniature radial electrolytic capacitors where predictable lifetime, documented ripple ratings, and RoHS compliance are required. The Nichicon UAS-series heritage and mass-production status support consistent availability for volume designs.

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