UHW2A391MHD

The UHW2A391MHD is a high-reliability miniature aluminum electrolytic capacitor in a radial lead can, offering 390 µF capacitance at a 100 V rating. It combines a compact φ12.5×35.5 mm case with design targets toward applications that require elevated ripple performance and extended endurance.

Engineered for general-purpose power electronics, the UHW2A391MHD delivers measurable performance advantages—low impedance at higher frequencies, specified ripple current capability, and long life at elevated temperature—while remaining RoHS compliant.

Key Features

• Capacitance & Voltage — 390 µF nominal capacitance with a rated voltage of 100 V and a capacitance tolerance of -20% to +20% (measured at 120 Hz, 20°C).
• High Ripple Current — Low-frequency ripple current specified at 1.3 A (120 Hz) and high-frequency ripple current at 2.6 A (10 kHz), supporting demanding ripple environments when driven at rated voltage.
• Low Loss — Tangent of loss angle (tanδ) specified at 0.08 under 100 V, 120 Hz, 20°C, indicating reduced AC dissipation in filtering and decoupling roles.
• Wide Temperature Range & Endurance — Rated for -40°C to +105°C with an endurance rating of 12,000 hours at 105°C when operated under rated conditions.
• Compact Radial Can Package — φ12.5 mm diameter by 35.5 mm length with radial leads and 5.0 mm lead spacing (±0.5 mm), available in bulk (no terminal forming) or bag packing.
• Leakage Current & Impedance — Specified leakage current of 390 µA and an impedance of 110 mΩ, enabling predictable DC and AC performance for system design.
• RoHS Compliant — Meets RoHS directive requirements for use in compliant product designs.

Typical Applications

• General Purpose Power Electronics — Suitable where a 100 V, 390 µF polarized capacitor is required for energy storage, smoothing and bulk decoupling in general-purpose circuits.
• High-Frequency Filtering and Decoupling — Low impedance at higher frequencies and a 2.6 A ripple rating at 10 kHz support filtering/decoupling roles in switch-mode and high-frequency circuits.
• Industrial and Commercial Power Supplies — Endurance of 12,000 hours at 105°C and the specified leakage and loss characteristics support long-term operation in elevated-temperature power systems.

Unique Advantages

• Measurable ripple capacity: Explicit 1.3 A (120 Hz) and 2.6 A (10 kHz) ripple current ratings allow designers to size capacitors against known ripple loads.
• Extended high-temperature life: 12,000 hour endurance at 105°C provides predictable aging for designs exposed to sustained elevated temperatures.
• Compact radial-can footprint: φ12.5×35.5 mm case with 5.0 mm lead spacing offers a small-board-area option for through-hole assemblies.
• Low dissipation: tanδ of 0.08 (100 V, 120 Hz, 20°C) and 110 mΩ impedance help minimize heat generation under AC stress.
• Clear manufacturing options: Available in bulk (no terminal forming) or bag packing to match component handling and assembly workflows.
• Regulatory alignment: RoHS compliance supports integration into compliant product lines.

Why Choose UHW2A391MHD?

The UHW2A391MHD positions itself as a compact, high-reliability aluminum electrolytic solution for designs requiring a 100 V polarized capacitor with strong ripple-handling capability and long-term stability at elevated temperatures. Its combination of low loss, defined leakage, and measurable ripple ratings provides designers with predictable electrical behavior for power-focused circuits.

This part is well suited to engineers and procurement teams specifying capacitors for general-purpose power electronics and industrial power supplies who need a balance of compact size, defined ripple capability, and extended endurance backed by Nichicon's UHW series specifications.

If you would like pricing, availability or lead-time information for UHW2A391MHD, request a quote or submit an inquiry and our team will respond with the necessary details.