UPJ1H681MHD6

The UPJ1H681MHD6 is a miniature, high-reliability aluminum electrolytic capacitor from Nichicon's UPJ series. It is a radial-lead, polarized component rated at 680 µF and 50 V, optimized for low impedance and high endurance in power applications.

Designed for demanding power-management tasks such as switching power supplies and DC–DC conversion, this capacitor delivers measurable low-loss performance (tanδ = 0.10 at 20°C, 120 Hz) and sustained ripple handling across low and high frequency ranges.

Key Features

• Capacitance & Voltage — 680 µF rated capacitance at 50 V, suitable for bulk filtering and energy storage in compact power rails.
• Low Loss (tanδ) — Loss tangent specified at 0.10 (measured at 20°C, 120 Hz) for predictable AC performance in filter and decoupling roles.
• Ripple Current Capability — Rated low-frequency ripple current of 918 mA at 120 Hz and high-frequency ripple current of 1.35 A at 200 kHz to support both line-frequency and switching-frequency environments.
• High Reliability Endurance — Load life rated to 5000 hours at +105°C, demonstrating sustained electrical characteristics under elevated temperature stress.
• Wide Operating Temperature — Specified for −55°C to +105°C operation, enabling use across a broad ambient range.
• Compact Radial Package — Metal can, radial-lead construction with a case size of φ16 × 20 mm and 7.5 mm lead spacing (±0.5 mm) for through-hole assemblies.
• Leakage Current — Specified leakage current of 1020 µA (after 1 minute at rated voltage, 20°C based on manufacturer spec), allowing designers to budget for standby losses.
• RoHS Compliant — Conforms to RoHS requirements for lead-free assembly considerations.

Typical Applications

• Switching Power Supplies — Bulk filtering and smoothing on output rails where low impedance and endurance at elevated temperature are required.
• DC–DC Converters — Input and output decoupling for converters operating at both low and high switching frequencies, leveraging specified ripple current ratings.
• Industrial Power Electronics — Energy storage and transient suppression in control modules that require long life at high operating temperatures.
• General Purpose Power Filtering — Through-hole designs needing a compact, polarized capacitor for board-level filtering and energy buffering.

Unique Advantages

• Proven UPJ Series Reliability: Endurance rated to 5000 hours at +105°C provides long-term stability for power-supply designs.
• Measurable Low-Loss Performance: tanδ = 0.10 at 20°C, 120 Hz enables predictable AC behavior for filter design and impedance budgeting.
• Dual-Frequency Ripple Handling: Distinct ripple current ratings for 120 Hz and 200 kHz allow straightforward selection for both mains-frequency smoothing and high-frequency switching applications.
• Compact Through-Hole Footprint: φ16 × 20 mm can size with 7.5 mm lead spacing fits dense, serviceable PCB layouts where radial parts are preferred.
• Design-Ready Specifications: Clear leakage current and tolerance data (±20%) simplify thermal, loss, and tolerance budgeting during BOM selection.

Why Choose UPJ1H681MHD6?

UPJ1H681MHD6 is positioned for engineers who need a compact, durable electrolytic capacitor with defined low-loss behavior and robust ripple handling for both low- and high-frequency power systems. Its combination of 680 µF/50 V capability, 5000-hour endurance at +105°C, and radial through-hole package makes it well suited for reliable power filtering in switching supplies, converters, and industrial power modules.

Choosing this part provides clear, testable electrical specifications that simplify integration into designs where predictable AC performance, thermal endurance, and RoHS compliance are required.

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