UPA1V391MPD

The UPA1V391MPD is a miniature, high-reliability aluminum electrolytic capacitor from Nichicon’s UPA series, configured as a radial-lead can. It delivers 390 µF at 35 V in a compact φ8 × 20 mm package with 3.5 mm lead spacing, designed for general-purpose power filtering and decoupling in densely packed power electronics.

Engineered for low impedance and elevated ripple handling, this part supports operation across a wide temperature range (−55 °C to 105 °C) and a rated endurance of 3000 hours at 105 °C, making it suitable for switching power supplies and other high-stress power applications.

Key Features

• Capacitance & Voltage — 390 µF nominal capacitance with a rated voltage of 35 V and tolerance of −20% to +20% for stable bulk energy storage and decoupling.
• Low Impedance — Specified impedance of 88 mΩ, enabling lower voltage ripple and improved transient response in power rails.
• High Ripple Current Capability — Low-frequency ripple current of 915 mA (120 Hz) and high-frequency ripple current of 1.22 A (10 kHz), supporting robust AC stress handling in switching environments.
• Loss Characteristics — Tangent of loss angle (tan δ) of 0.12 at 20 °C, 120 Hz (rated 35 V), indicating controlled dissipation for thermal management.
• Wide Temperature & Endurance — Operating range from −55 °C to 105 °C and a rated life of 3000 hours at 105 °C for reliability under elevated temperature and bias.
• Compact Radial Package — φ8 × 20 mm can with 3.5 mm lead spacing (lead spacing tolerance ±0.5 mm) and radial lead mounting for through-hole assembly and straightforward prototyping or production use.
• Leakage Current — Specified leakage current of 409.5 µA, providing predictable bias current behavior after voltage application.
• Packaging Options — Available in bulk (no terminal forming) or bag packing to suit assembly and handling preferences.

Typical Applications

• Switching Power Supplies — Bulk and smoothing capacitor for input/output stages where low impedance and high ripple capability reduce voltage ripple and improve regulation.
• Power Filtering for Industrial Electronics — Energy storage and decoupling in compact power modules and control electronics exposed to continuous load and elevated temperatures.
• Consumer and Embedded Power Rails — Decoupling and reservoir capacitor for compact consumer devices and embedded boards where board space is constrained but ripple performance is required.

Unique Advantages

• Compact energy density: 390 µF in a φ8 × 20 mm can minimizes PCB area while preserving bulk capacitance for decoupling and smoothing.
• Low impedance for improved performance: 88 mΩ impedance reduces AC voltage drop and supports tighter power-supply regulation under transient loads.
• High ripple tolerance: Rated ripple currents of 915 mA (120 Hz) and 1.22 A (10 kHz) enable reliable operation in switching environments with mixed frequency content.
• Wide temperature endurance: −55 °C to 105 °C operating range and 3000 hours life at 105 °C provide durability for long-term thermal and electrical stress.
• Predictable dissipation and leakage: tan δ of 0.12 (120 Hz, 20 °C) and 409.5 µA leakage give predictable thermal and bias behavior for design validation.
• Flexible packaging: Bulk or bag packing options simplify inventory and assembly workflows for prototyping and production runs.

Why Choose UPA1V391MPD?

The UPA1V391MPD balances compact size, low impedance, and high ripple-current capability in a proven radial-lead aluminum electrolytic design from Nichicon. Its combination of 390 µF capacitance at 35 V, controlled dissipation (tan δ 0.12), and a −55 °C to 105 °C operating range makes it well suited to engineers designing switching power supplies, compact power modules, and general-purpose decoupling across industrial and consumer applications.

With a specified 3000-hour endurance at 105 °C and predictable leakage and impedance characteristics, this part supports reliable, repeatable performance over design lifecycles while simplifying board-level integration in through-hole assemblies.

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