UCP2W181MHD

The UCP2W181MHD is a miniature, high‑reliability aluminum electrolytic capacitor from Nichicon’s UCP series. It is a radial‑lead, polarized electrolytic designed for high‑voltage applications requiring compact size and long operational life.

With a 450 V rated voltage, 180 µF capacitance and a rated lifetime of 10,000 hours at 105 °C, this part targets high‑voltage power electronics and industrial equipment where sustained ripple handling and temperature endurance are important.

Key Features

• Electrical performance — 180 µF nominal capacitance with ±20% tolerance and a 450 V rated voltage, providing bulk energy storage for high‑voltage circuits.
• Low loss characteristic — tan δ specified at 0.24 (measured at 20 °C, 120 Hz), supporting predictable AC loss behavior in ripple environments.
• Ripple current capability — Low‑frequency ripple current 1.09 A at 120 Hz and high‑frequency ripple current 1.635 A at 10 kHz, enabling effective smoothing under AC ripple loads.
• Leakage current — Specified leakage current of 3340 µA (product data); the datasheet also provides the general leakage current guideline I = 0.04CV + 100 (µA) after 1 minute at 20 °C.
• Long life / endurance — Rated for 10,000 hours at 105 °C with defined limits for capacitance change, tan δ and leakage current after endurance testing.
• Temperature range — Operates from −40 °C to +105 °C to cover a wide range of industrial operating conditions.
• Compact radial package — Case size φ18 × 46 mm with 7.5 mm lead spacing (±0.5 mm) and radial lead mounting for through‑hole assemblies; available in bulk or bag packing.
• Production status — Mass production availability for supply continuity.

Typical Applications

• High‑voltage power supplies — Bulk energy storage and smoothing in 400–450 V class supplies where the 450 V rating and ripple capability are required.
• Industrial power electronics — Filtering and DC link duties in industrial converters and inverters that demand extended lifetime at elevated temperatures.
• General purpose high‑voltage circuits — Polarized capacitance for circuits needing compact, long‑life aluminum electrolytic solutions in a radial through‑hole form factor.

Unique Advantages

• High‑voltage capability: 450 V rating supports 400–450 V class designs without up‑rating multiple lower‑voltage parts.
• Long operational life: 10,000 hours endurance at 105 °C reduces maintenance and replacement frequency in continuous‑duty systems.
• Compact footprint: φ18 × 46 mm case offers a small high‑voltage form factor for space‑constrained boards.
• Robust ripple handling: Specified ripple currents at both 120 Hz and 10 kHz accommodate a range of switching and line frequencies.
• Wide temperature range: −40 °C to +105 °C rating enables deployment across diverse operating environments.
• Through‑hole mounting: Radial leads and defined lead spacing simplify prototyping and reliable mechanical mounting in legacy and industrial assemblies.

Why Choose UCP2W181MHD?

The UCP2W181MHD is positioned for designs that require a combination of high voltage, compact size and long life. Its 450 V rating, substantial capacitance and endurance at 105 °C make it suitable for high‑voltage power electronics and industrial applications where durability and predictable ripple performance matter.

Engineers specifying this part gain a radial, through‑hole aluminum electrolytic with defined leakage, loss and ripple characteristics—helpful for conservative, reliability‑focused designs and procurement planning.

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