UPS1A331MPD

The UPS1A331MPD is a miniature, radial‑lead aluminum electrolytic capacitor from Nichicon’s UPS series, designed for low‑impedance, high‑reliability applications. It delivers 330 µF at 10 V in a compact φ8 × 11.5 mm can with 3.5 mm lead spacing, making it suitable for space‑constrained power circuits.

Engineered for switching power supplies and general‑purpose power filtering, the capacitor combines wide operating temperature (-55°C to 105°C), defined endurance (2000 hours at 105°C), and measurable ripple handling to support robust power‑supply decoupling in demanding environments.

Key Features

• Capacitance & Voltage — 330 µF nominal capacitance rated at 10 V with tolerance -20% to +20% for predictable bulk energy storage and decoupling.
• Low Impedance — Rated impedance of 280 mΩ supports lower ESR behavior for improved ripple performance in switching supplies.
• Ripple Current Performance — Low‑frequency ripple current 291.1 mA (120 Hz) and high‑frequency ripple current 410 mA (10 kHz) for stable operation across common switching frequencies.
• Loss and Leakage — Tangent of loss angle (tan δ) of 0.20 (measured at 20°C, 120 Hz) and leakage current 99 µA, offering controlled dissipation and predictable leakage characteristics.
• Temperature and Endurance — Wide operating range from -55°C to 105°C and endurance rated at 2000 hours at 105°C, supporting long‑life operation under elevated temperature stress.
• Compact Radial Package — φ8 × 11.5 mm can, radial lead mounting with 3.5 mm lead spacing (±0.5 mm), available in bulk or bag packing for through‑hole assembly.
• Compliance — RoHS‑compliant construction for regulatory alignment in commercial products.

Typical Applications

• Switching Power Supplies — Bulk smoothing and output decoupling where compact, low‑impedance capacitors are required to reduce ripple at 120 Hz and higher switching frequencies.
• General‑Purpose Power Filtering — Local energy storage and transient suppression in compact electronic designs that operate across a wide temperature range.
• Compact Electronic Assemblies — Through‑hole mounting in space‑constrained boards requiring reliable performance (-55°C to 105°C) and defined endurance.

Unique Advantages

• Space‑efficient energy storage: 330 µF in a φ8 × 11.5 mm can provides significant capacitance for tight layouts without sacrificing performance.
• Measured ripple capability: Specified ripple current values at 120 Hz and 10 kHz let designers match capacitor selection to switching and filtering requirements.
• Predictable electrical behavior: Defined impedance (280 mΩ), tan δ (0.20), and leakage current (99 µA) simplify thermal and loss budgeting in power designs.
• Wide temperature and proven endurance: Rated for -55°C to 105°C with 2000 hours life at 105°C, supporting reliable operation in elevated‑temperature environments.
• Radial lead convenience: Through‑hole radial mounting with standard 3.5 mm lead spacing eases placement in legacy and mixed‑technology PCBs.
• Production availability: Mass production status supports stable supply for volume deployments.

Why Choose UPS1A331MPD?

UPS1A331MPD positions itself as a compact, reliable choice for engineers needing low‑impedance bulk capacitance in switching power supplies and general‑purpose power filtering. The combination of 330 µF at 10 V, clearly specified ripple currents, low impedance, and a wide operating temperature range enables predictable performance in compact, thermally demanding designs.

Manufactured by Nichicon and offered in mass production with RoHS compliance, this radial‑lead capacitor is suited to designs where space, thermal endurance, and measurable electrical characteristics matter. It supports engineers seeking a verifiable component for robust power decoupling and smoothing in commercial electronic products.

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