UHW2A391MHD6

The UHW2A391MHD6 is a miniature, high-reliability aluminum electrolytic capacitor from Nichicon's UHW series, supplied in a radial lead can. It delivers 390 µF at 100 V with a compact φ16×25 mm case and is designed for general-purpose electronic applications that require elevated ripple-current capability and long-term endurance.

Key value propositions include high-frequency performance with low impedance, robust ripple-current handling across low and high frequencies, and rated endurance at elevated temperature for demanding service life requirements.

Key Features

• Electrical Capacity and Voltage: 390 µF nominal capacitance with a rated voltage of 100 V and tolerance of −20% to +20%.
• Low Impedance: Specified impedance of 120 mΩ, supporting low-loss performance in AC and high-frequency environments.
• High Ripple-Current Capability: Low-frequency ripple current 1.215 A at 120 Hz and high-frequency ripple current 2.43 A at 10 kHz, enabling effective smoothing in applications with significant ripple.
• Loss Characteristics: tanδ (DF) of 0.08 measured at 20°C, 120 Hz, for predictable dissipation behavior.
• Long Endurance at Elevated Temperature: Rated life of 12,000 hours at 105°C, with specified limits for capacitance change, tanδ, and leakage after endurance testing.
• Leakage Current: Specified leakage current of 390 µA.
• Mechanical and Mounting: Radial lead can package, size φ16×25L with 7.5 mm lead spacing (±0.5 mm), suitable for through-hole mounting and bulk or bag packing.
• Operating Temperature Range: −40°C to +105°C for a wide range of ambient conditions.
• Compliance: RoHS-compliant construction.

Typical Applications

• Power Filtering and Smoothing — Provides bulk capacitance and high ripple-current handling for DC smoothing and bulk energy storage in general-purpose power circuits.
• Switching Power Supplies — Low impedance and strong high-frequency ripple-current rating make it suitable for filtering at switching nodes and output stages.
• Industrial Electronics — Long endurance at 105°C and a wide operating temperature range support continuous operation in industrial platforms.
• General-Purpose Electronic Equipment — Compact radial-lead form factor and high voltage rating fit diverse board-level power and decoupling roles in general-purpose designs.

Unique Advantages

• High ripple-current tolerance in a miniature package: Delivers 2.43 A at 10 kHz and 1.215 A at 120 Hz in a φ16×25 mm can, enabling space-saving designs without sacrificing ripple capability.
• Durability at elevated temperature: 12,000-hour life rating at 105°C provides predictable long-term performance for sustained high-temperature use.
• Low-loss behavior: tanδ of 0.08 at 120 Hz (20°C) and low impedance (120 mΩ) reduce dissipation and improve efficiency in AC and switching environments.
• Through-hole robustness: Radial lead mounting with defined 7.5 mm lead spacing simplifies assembly and mechanical retention on PCBs.
• Regulatory compliance: RoHS-compliant construction supports environmentally conscious designs.

Why Choose UHW2A391MHD6?

UHW2A391MHD6 positions itself as a compact, high-voltage electrolytic capacitor targeted at engineers who need substantial capacitance and high ripple-current handling in a small through-hole package. Its combination of 390 µF at 100 V, low impedance, and extended 12,000-hour life at 105°C makes it suitable for demanding general-purpose power applications where long-term stability and predictable dissipation are important.

This part is well suited to designers of power supplies, industrial electronics, and other general-purpose equipment seeking a balance of high ripple capability, compact size, and endurance backed by Nichicon's UHW series specifications.

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