UHE2A181MHD

The UHE2A181MHD is a radial lead aluminum electrolytic capacitor from Nichicon's UHE series, offering 180 µF capacitance at a 100 V rating in a miniature, low-impedance can (φ12.5 × 25 mm). It is designed for general-purpose power electronics that require reliable bulk capacitance and stable performance across a wide temperature range.

Part of the UHE family, this device combines low impedance (450 mΩ), measurable low-loss behavior (tanδ 0.08 at 20°C, 120 Hz) and long endurance (10,000 hours at 105°C), making it suitable for demanding designs where sustained ripple handling and long-term reliability are important.

Key Features

• Electrical characteristics — 180 µF nominal capacitance with a rated voltage of 100 V and tolerance of −20% to +20%.
• Low impedance and low loss — Impedance of 450 mΩ and tanδ (DF) of 0.08 measured at 20°C, 120 Hz, supporting efficient energy storage with reduced dissipation.
• Ripple current capability — Rated low-frequency ripple current of 612.5 mA at 120 Hz and high-frequency ripple current of 875 mA at 10 kHz, enabling robust ripple handling in power circuits.
• Leakage current — Specified leakage current of 180 µA, supporting predictable standby and quiescent behaviors.
• High endurance — Endurance of 10,000 hours at 105°C under rated DC bias plus rated ripple current, per UHE series specifications.
• Wide operating range — Operating temperature span from −40°C to +105°C for use in diverse environments.
• Radial lead, through‑hole package — φ12.5 × 25 mm can with 5 mm lead spacing (±0.5 mm) for straightforward through-hole assembly; supplied in bulk or bag packing.
• RoHS compliant — Meets RoHS requirements as indicated for the UHE series.

Typical Applications

• Power supply filtering — Bulk smoothing and energy storage for DC rails where 100 V rating and 180 µF capacitance are required.
• Decoupling and ripple suppression — Local decoupling on high-voltage rails that demand low impedance and defined ripple-current capability across low and high frequencies.
• Industrial and general-purpose electronics — Applications requiring long endurance at elevated temperature and stable performance from −40°C to +105°C.

Unique Advantages

• Long-term reliability: 10,000-hour endurance at 105°C provides predictable service life under sustained thermal and electrical stress.
• High ripple handling: Specified ripple currents at both low (612.5 mA at 120 Hz) and high (875 mA at 10 kHz) frequencies support mixed-frequency power environments.
• Low impedance and low loss: 450 mΩ impedance and tanδ of 0.08 reduce power dissipation and improve efficiency in filtering applications.
• Compact radial can: φ12.5 × 25 mm size with 5 mm lead spacing offers a compact through-hole option for board-level integration.
• Predictable leakage: 180 µA leakage current specification aids in system-level power budgeting and standby considerations.
• RoHS compliance: Conforms to RoHS directive as provided in the product information.

Why Choose UHE2A181MHD?

UHE2A181MHD targets engineers who need a compact, low-impedance 180 µF solution rated for 100 V with proven endurance under elevated temperatures. Backed by Nichicon's UHE series specifications, it delivers measurable ripple handling, low loss, and consistent leakage behavior—attributes important for reliable power supply filtering and decoupling in general-purpose electronic designs.

This part is suited for designs that prioritize long operational life and stable electrical performance across −40°C to +105°C. Its radial lead format and standard lead spacing simplify through-hole assembly, while defined ripple and leakage specifications make system-level design and thermal planning more predictable.

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