UPJ1A681MPD

The UPJ1A681MPD is a radial-lead aluminum electrolytic capacitor from Nichicon's UPJ series, engineered for low impedance performance in switching power supply applications. This polarized, radial-can capacitor delivers 680 µF at a 10 V rating in a compact φ8 × 20 mm package with 3.5 mm lead spacing.

Designed for reliability in demanding power environments, the UPJ1A681MPD offers specified ripple handling, controlled dissipation factor, and a wide operating temperature range suitable for general-purpose electronic power filtering and decoupling.

Key Features

• Low-impedance UPJ series design — Series is specified for low impedance and suitability in switching power supplies, helping reduce voltage ripple under load.
• Capacitance and rating — 680 μF nominal capacitance at a rated voltage of 10 V with ±20% tolerance, providing bulk energy storage for power rails.
• Controlled loss (tan δ) — tanδ 0.19 measured at 20°C, 120 Hz, 10 V, enabling predictable AC performance.
• Ripple current capability — Low-frequency ripple current of 448.8 mA at 120 Hz and high-frequency ripple current of 660 mA at 200 kHz, supporting both low- and high-frequency filtering demands.
• Leakage current — Specified leakage current of 204 μA, consistent with the part’s capacitance and voltage rating.
• Temperature and endurance — Operating range from −55°C to +105°C with an endurance rating of 3000 hours at 105°C for the φ8 package.
• Form factor and mounting — Radial lead mounting in a φ8 × 20 mm can with 3.5 mm lead spacing; packaged bulk (no terminal forming) or bag packing for flexible assembly handling.
• RoHS compliant — Meets RoHS environmental requirements.

Typical Applications

• Switching power supplies — Low impedance and specified ripple performance make this capacitor well-suited for output filtering and smoothing in DC–DC converters and switching regulators.
• Point-of-load decoupling — Compact φ8 × 20 mm size and high capacitance support local energy storage and transient response on board-level power rails.
• Power management modules — Use in power modules and assemblies where reliable operation at elevated temperature (up to 105°C) and predictable endurance are required.

Unique Advantages

• Optimized for switching environments — The UPJ series’ low-impedance construction and specified ripple currents reduce voltage ripple in switching power applications.
• High-capacitance in a small can — 680 μF in a φ8 × 20 mm package provides significant capacitance in a compact footprint for space-constrained boards.
• Predictable AC loss — Specified tanδ (0.19 at 20°C, 120 Hz, 10 V) supports predictable thermal and AC behavior during design validation.
• Rated endurance at elevated temperature — 3000 hours at 105°C for the φ8 size offers defined lifecycle expectations for thermal stress conditions.
• Clear electrical limits — Published leakage current (204 μA) and ripple current ratings aid in thermal and reliability calculations during design.
• RoHS compliance — Facilitates integration into environmentally regulated product lines.

Why Choose UPJ1A681MPD?

UPJ1A681MPD positions itself as a component optimized for designers needing a compact, high-capacitance aluminum electrolytic with low impedance characteristics for switching power applications. Its combination of 680 μF at 10 V, defined ripple current capability, and a temperature range of −55°C to +105°C makes it suitable for board-level power filtering and decoupling where predictable AC performance and endurance are important.

This part is appropriate for engineers and procurement teams seeking a mass-production-ready radial-lead capacitor with clear electrical specifications (tanδ, leakage current, ripple ratings) and RoHS compliance, enabling straightforward integration into power electronics designs with predictable long-term behavior.

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