UHW2A391MHD3

The UHW2A391MHD3 is a miniature, high-reliability aluminum electrolytic capacitor in Nichicon’s UHW series. It is a radial-lead, polarized capacitor specified at 390 µF and 100 V designed for general-purpose electronic applications.

Engineered for compact installations that require high ripple handling and long operational life, this part provides a balance of capacitance, voltage rating, and thermal endurance suitable for a wide range of board-level power functions.

Key Features

• Capacitance & Voltage — 390 µF nominal capacitance with a 100 V rated voltage and a tolerance of -20% to +20%.
• High Ripple Current — Low-frequency ripple current of 1.135 A at 120 Hz and high-frequency ripple current of 2.27 A at 10 kHz for improved handling of AC stress on DC rails.
• Low Impedance — Impedance specified at 140 mΩ, supporting better performance at high frequencies compared with larger-impedance alternatives.
• Low Loss (tan δ) — Tangent of loss angle (tan δ) of 0.08 measured at 20°C and 120 Hz (100 V), indicating controlled dielectric losses for power applications.
• Leakage Current — Specified leakage current of 390 µA after rated voltage application, enabling predictable standby and bias behavior.
• Long Endurance — Rated life of 12,000 hours at 105°C, delivering extended service in higher-temperature environments.
• Compact Radial Package — Metal can radial-lead package with dimensions φ18 × 20L mm and 7.5 mm lead spacing (±0.5 mm), suitable for through-hole board layouts.
• RoHS Compliant & Production Ready — RoHS compliant and listed as mass production status; available in bulk (no terminal forming) or bag packing.

Typical Applications

• General-purpose power smoothing — Provides bulk capacitance and ripple handling for general-purpose circuits that require 390 µF at up to 100 V.
• DC link and energy storage — Compact radial package and 100 V rating support board-level DC link and local energy storage needs.
• High-temperature environments — Long endurance of 12,000 hours at 105°C makes it suitable where elevated operating temperature and durability are required.

Unique Advantages

• High ripple capability: Specified ripple currents at both 120 Hz and 10 kHz help manage AC stress across a broad frequency range.
• Predictable thermal endurance: 12,000-hour life at 105°C provides clear lifetime expectations for thermal design and maintenance planning.
• Compact footprint: φ18 × 20L mm can reduce board area compared with larger can sizes while still delivering 390 µF at 100 V.
• Low impedance and loss: 140 mΩ impedance and tan δ of 0.08 (120 Hz, 20°C) support improved high-frequency performance and efficient power conditioning.
• Production-ready packaging: Available in bulk or bag packing for volume assembly and stocking convenience.
• Regulatory compliance: RoHS conformity supports use in designs requiring lead-free directive compliance.

Why Choose UHW2A391MHD3?

UHW2A391MHD3 combines a 390 µF capacitance and 100 V rating with a compact radial can to deliver reliable bulk capacitance and high ripple performance in general-purpose electronic designs. Its low impedance, controlled dielectric loss, and specified leakage current provide predictable electrical behavior across operating conditions.

This part is suited to engineers and procurement teams looking for a miniature, long-life electrolytic solution for board-level power smoothing, DC link applications, and other general-purpose uses where a balance of voltage rating, ripple capability, and thermal endurance is required. RoHS compliance and mass-production availability support volume deployment and regulatory needs.

If you would like pricing or availability information for UHW2A391MHD3, request a quote or submit an inquiry to our sales team for a prompt response.