UCPW6181MHD

The UCPW6181MHD from Nichicon is a high-voltage, miniature aluminum electrolytic capacitor in the UCP series, delivered in a radial lead can. It provides 180 µF capacitance at a 420 V rating with polarized radial leads and a compact φ18 × 40 mm package.

Designed for general-purpose high-voltage applications where long life and stable performance are required, this part combines long endurance (10,000 hours at 105°C) with defined ripple-current capability and low loss (tanδ = 0.24 at 120 Hz, 20°C).

Key Features

• High Voltage Rating — Rated for 420 V DC to support high-voltage filtering and energy-storage duties in general-purpose designs.
• Nominal Capacitance — 180 µF with a tolerance of −20% to +20%, offering a predictable capacitance window for design calculations.
• Long Endurance — 10,000 hours at 105°C under rated conditions, specified for long-term reliability in thermal-stressed environments.
• Low Loss — tanδ of 0.24 measured at 120 Hz and 20°C, supporting efficient AC behavior in filter and decoupling roles.
• Ripple Current Handling — Low-frequency ripple current of 1.04 A (120 Hz) and high-frequency ripple current of 1.56 A (10 kHz), enabling effective smoothing across frequency ranges.
• Leakage Current — Specified leakage current of 3124 µA (measurement condition per product data), useful for bias and insulation planning.
• Compact Radial Package — φ18 × 40 mm can with 7.5 mm lead spacing (±0.5 mm) for through-hole mounting and dense board layouts.
• Wide Operating Range — Rated for operation from −40°C to +105°C to accommodate a variety of ambient conditions.
• Packaging Options — Available in bulk (no terminal forming) or bag packing to suit production and prototype workflows.

Typical Applications

• General-purpose high-voltage power supplies — Bulk filtering and energy storage where a 420 V rated electrolytic is required and board space is limited.
• Industrial power electronics — DC link smoothing or intermediate bus filtering in equipment that requires extended endurance at elevated temperatures.
• High-voltage DC filtering — Ripple attenuation across a wide frequency range using the specified low- and high-frequency ripple-current ratings.

Unique Advantages

• High-voltage capability — The 420 V rating enables use in circuits that require elevated DC voltage margins without resorting to larger solutions.
• Long-life specification — 10,000 hours at 105°C provides predictable end-of-life behavior for maintenance planning and reliability targets.
• Frequency-versatile ripple handling — Separate low-frequency and high-frequency ripple current ratings (1.04 A and 1.56 A) help ensure effective filtering across operating spectra.
• Compact footprint — φ18 × 40 mm can and 7.5 mm lead spacing support through-hole assembly in space-constrained designs.
• Stable low-temperature performance — Documented impedance stability at low temperatures contributes to reliable performance in colder operating conditions.

Why Choose UCPW6181MHD?

UCPW6181MHD targets designers who need a compact, high-voltage electrolytic capacitor with defined endurance and ripple capabilities. Its combination of 420 V rating, 180 µF nominal capacitance, and 10,000-hour life at 105°C makes it suitable for long-running, general-purpose high-voltage circuits where predictability and thermal robustness matter.

As a member of Nichicon’s UCP series, this part brings a clear set of electrical and mechanical specifications—compact can size, polarized radial lead configuration, and measured leakage and loss values—that simplify component selection and system-level thermal/ripple budgeting.

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