UCD1H391MNQ1MS

The UCD1H391MNQ1MS is a chip-type, low-impedance aluminum electrolytic capacitor designed for surface-mount applications. With 390 µF capacitance at 50 V and a compact radial can SMD package, it is intended for high-density PC boards and automated assembly.

Engineered for demanding thermal and lifetime requirements, this device supports operation from -55°C to 105°C and offers long endurance at elevated temperature, making it suitable for robust power filtering and decoupling tasks across industrial and automotive segments.

Key Features

• Capacitance & Voltage — 390 µF nominal capacitance rated at 50 V for bulk energy storage and power-rail smoothing.
• Low Impedance Chip Type — Series-design low impedance construction optimized for SMD placement on high-density PCBs.
• Temperature Range & Endurance — Operates from -55°C to 105°C with a rated lifetime of 5000 hours at 105°C.
• Ripple Current Handling — Supports 450 mA at 120 Hz and 900 mA at 10 kHz, enabling effective AC ripple filtering across a range of frequencies.
• Leakage and Dissipation — Specified leakage current of 195 µA and tan δ ~0.10 measured at 20°C, 120 Hz for predictable loss behavior.
• Packaging & Mounting — Surface mount radial can (φ12.5 × 13.5L) supplied on embossed carrier taping for compatibility with automated pick-and-place.
• Qualification & Compliance — AEC-Q200 qualified and RoHS compliant, supporting applications with elevated reliability requirements.
• Tolerance — Capacitance tolerance of -20% to +20% at 120 Hz, 20°C for design margin planning.

Typical Applications

• Automotive electronics — Power-rail decoupling and smoothing in control modules and in-vehicle power systems, supported by AEC-Q200 qualification and 105°C endurance.
• High-density SMD power supplies — Bulk decoupling on compact PCBs where chip-type low impedance SMD capacitors enable space-efficient power filtering.
• Embedded and industrial equipment — Long-life filtering in systems exposed to elevated temperatures and continuous operation, leveraging the 5000-hour rating at 105°C.
• Switching regulator output — Effective ripple suppression across low and high frequencies thanks to specified ripple current ratings at 120 Hz and 10 kHz.

Unique Advantages

• Low-impedance performance: Series chip-type construction and low tan δ provide efficient ripple handling and stable AC behavior for power applications.
• High-temperature endurance: 5000 hours at 105°C enables reliable operation in thermally demanding environments and long-duration duty cycles.
• Automotive-grade qualification: AEC-Q200 qualification supports deployment in vehicle electronics where standardized reliability is required.
• Automated assembly ready: Supplied on embossed carrier tape for streamlined integration into pick-and-place manufacturing flows.
• Compact SMD can: φ12.5 × 13.5L package footprint balances capacitance density with a small board area for space-constrained designs.
• Measured ripple capability: Explicit ripple current specifications at 120 Hz and 10 kHz allow designers to match the part to expected operating frequencies.

Why Choose UCD1H391MNQ1MS?

The UCD1H391MNQ1MS combines chip-type low impedance construction with a compact SMD radial can, providing a practical solution for designers seeking robust bulk capacitance for power filtering on dense PCBs. Its 50 V rating, defined leakage and dissipation characteristics, and quantified ripple current performance make it straightforward to specify into regulated power rails and switching outputs.

With AEC-Q200 qualification, RoHS compliance, and a 5000-hour endurance at 105°C, this capacitor is positioned for applications that require long-term stability and automotive-grade reliability while maintaining compatibility with automated assembly processes.

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