UCY2G181MHD

The UCY2G181MHD is a radial-lead aluminum electrolytic capacitor offering 180 µF capacitance at a 400 V rating. It is part of Nichicon's UCY series designed for high ripple current and long endurance in demanding power applications.

With a −40 °C to +105 °C operating range, AEC-Q200 rating, and a 12,000-hour life at 105 °C, this capacitor targets automotive and industrial power circuits where high voltage handling, ripple performance, and long-term reliability are required.

Key Features

• Capacitance & Voltage — 180 µF rated capacitance at 400 V provides energy storage and smoothing for high-voltage power rails.
• High ripple current capability — Rated ripple currents of 1.11 A at 120 Hz and 2.22 A at 100 kHz support heavy AC ripple filtering in power supplies and converters.
• Long endurance — Designed for 12,000 hours of life at 105 °C under DC bias plus rated ripple current, enabling extended service in high-temperature environments.
• Temperature range — Wide operating range from −40 °C to +105 °C for use across automotive and industrial temperature profiles.
• Dissipation characteristic — Tangent of loss angle (tan δ) specified at 0.24 (max) measured at 20 °C, 120 Hz, providing a defined dissipation characteristic for thermal and ripple calculations.
• Polarized radial-can package — φ18 × 46 mm can with 7.5 mm lead spacing (±0.5 mm) for through-hole radial mounting and straightforward PCB placement.
• AEC-Q200 qualified & RoHS compliant — Rated for applications requiring AEC-Q200 qualification and compliant with RoHS directives.
• Packaging options — Available in bulk (no terminal forming) or bag packing to suit production handling preferences.

Typical Applications

• Automotive power electronics — Energy smoothing and ripple filtering in automotive DC-DC converters and power distribution systems where AEC-Q200 qualification is required.
• Power supplies — Bulk smoothing and ripple handling for high-voltage power supplies and power modules operating up to 400 V.
• Ballasts and lighting drivers — Filtering and energy storage in ballast and lamp-driver circuits, as noted for the UCY series.
• Industrial power equipment — High-voltage filtering and decoupling in industrial converters and control systems operating across wide temperature ranges.

Unique Advantages

• High ripple-handling capacity: The specified ripple currents (1.11 A @120 Hz, 2.22 A @100 kHz) permit robust filtering in high-stress AC environments.
• Extended high-temperature life: 12,000 hours at 105 °C increases design longevity in elevated ambient conditions, reducing maintenance and replacement cycles.
• Clear dissipation spec: tan δ = 0.24 (max) at 120 Hz/20 °C gives a verifiable dissipation point for thermal and loss budgeting.
• AEC-Q200 qualification: Enables use in qualified automotive designs where AEC-level components are required.
• Convenient radial package: φ18 × 46 mm can size with 7.5 mm lead spacing supports straightforward through-hole assembly and mechanical stability.
• RoHS compliant and flexible packing: Environmentally compliant with bulk or bag packing options to match production needs.

Why Choose UCY2G181MHD?

The UCY2G181MHD combines a 400 V rating with 180 µF capacitance, defined dissipation characteristics, and high ripple capability to address demanding power-filtering and smoothing requirements. Its long-endurance specification at 105 °C and AEC-Q200 rating make it well suited to automotive-grade and industrial designs that require sustained performance in high-temperature and high-stress environments.

This part is appropriate for engineers specifying high-voltage bulk capacitance with quantified ripple, leakage, and endurance parameters where predictable long-term behavior and regulatory compliance (RoHS) are necessary.

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