UPW1H391MHD

The UPW1H391MHD is a miniature radial-lead aluminum electrolytic capacitor from Nichicon's UPW series, designed for low impedance and high reliability in power-electronic applications. This 390 µF, 50 V polarized capacitor targets switching power supplies and other power-rail circuits that require compact energy storage with durable high-temperature performance.

Key value propositions include low measured impedance (126 mΩ), robust ripple-current capability (1.11 A at 120 Hz and 1.48 A at 100 kHz), and long endurance rated at 7000 hours at 105°C, making it suitable for demanding industrial and automotive environments where AEC-Q200 qualification is required.

Key Features

• Capacitance & Voltage: 390 µF nominal capacitance with a 50 V rated voltage and tolerance of −20% to +20% for predictable energy storage.
• Low Impedance: Measured impedance of 126 mΩ supports tight voltage regulation and fast transient response in power rails.
• High Ripple Current Capability: Low-frequency ripple current of 1.11 A (120 Hz) and high-frequency ripple current of 1.48 A (100 kHz) for effective smoothing in switching supplies.
• Long Endurance & Wide Temperature Range: Rated for 7000 hours at 105°C and operates from −55°C to 105°C to support extended field life in elevated-temperature applications.
• AEC-Q200 Qualified: AEC-Q200 rating for automotive-grade reliability where qualification is required.
• Radial Lead Package: Compact can size φ12.5 × 20 mm with 5 mm lead spacing (±0.5 mm) and radial-lead mounting for through-hole assembly.
• Leakage & Dissipation: Specified leakage current of 585 µA and dissipation factor (tan δ) of 0.10 measured at 20°C, 120 Hz for predictable loss characteristics.
• Packaging Options: Available in bulk (no terminal forming) or bag packing to match assembly workflows.

Typical Applications

• Switching Power Supplies: Low impedance and high ripple-current handling make the UPW1H391MHD suitable for input/output filtering and bulk decoupling in switching regulators.
• Automotive Electronics: AEC-Q200 qualification and a −55°C to 105°C operating range support use in automotive power modules and control units.
• DC-DC Converters and Power Rails: Compact radial can and strong transient performance aid in voltage stabilization and ripple suppression on DC-DC converter outputs.
• Industrial Power Modules: Long endurance at elevated temperature and robust leakage/dissipation characteristics support continuous-operation industrial power systems.

Unique Advantages

• Low-impedance performance: 126 mΩ impedance reduces voltage drop and improves transient response in fast-switching circuits.
• High ripple tolerance across frequencies: Specified ripple currents of 1.11 A (120 Hz) and 1.48 A (100 kHz) allow reliable filtering across both low and high switching frequencies.
• Extended high-temperature life: Rated for 7000 hours at 105°C, delivering predictable long-term capacitance stability and reliability in heat-stressed designs.
• Automotive-grade qualification: AEC-Q200 rating provides documented qualification for use where automotive reliability standards apply.
• Compact, assembly-ready form factor: φ12.5 × 20 mm radial can with 5 mm lead spacing offers a small footprint and straightforward through-hole mounting.
• Flexible supply packaging: Available in bulk or bag packing to support high-volume production or smaller-quantity prototyping workflows.

Why Choose UPW1H391MHD?

UPW1H391MHD combines the UPW series' focus on low impedance and miniature sizing with proven high-temperature endurance and AEC-Q200 qualification, making it a practical choice for designers of switching power supplies, automotive power systems, and industrial power modules. Its measured impedance, ripple-current ratings, and long life at 105°C align performance and reliability for demanding power-electronics designs.

Choose UPW1H391MHD when you need a compact, through-hole aluminum electrolytic capacitor that balances ripple handling, thermal endurance, and automotive-grade qualification for robust, long-term operation in harsh environments.

Request a quote or submit an inquiry for pricing and availability of UPW1H391MHD to evaluate this capacitor for your next power-design project.