UCS2W330MHD

The UCS2W330MHD is a miniature, radial-lead aluminum electrolytic capacitor from Nichicon’s UCS series designed for high ripple current and long-life applications. Its polarized, radial-can construction and compact dimensions suit it to demanding power electronics roles.

Key use cases include power supply and lighting ballast applications where a high-voltage, compact capacitor with proven endurance and RoHS compliance is required.

Key Features

• Electrical rating — 33 µF capacitance at a 450 V rated voltage with ±20% tolerance, providing a high-voltage smoothing and energy-storage option in a compact package.
• High ripple capability — Rated ripple current of 490 mA at 120 Hz and 980 mA at 100 kHz, enabling reliable handling of AC ripple in power circuits.
• Frequency ripple scaling — Frequency coefficients for ripple current (50 Hz: 0.40, 120 Hz: 0.50, 1 kHz: 0.80, 10 kHz: 0.90, 100 kHz+: 1.00) allow designers to estimate ripple performance across operating frequencies.
• Long endurance — Designed for 10000 hours of load life at +105°C (series notes load life range of 8000–10000 hours at +105°C), with defined limits on capacitance change and dissipation factor after endurance testing.
• Operating conditions — Wide operating temperature range from −40°C to +105°C for stable performance across typical industrial environments.
• Compact radial package — Radial can package with lead spacing of 7.5 mm and overall size L: 2.5 cm × D: 1.6 cm, offering density for space-constrained PCBs while retaining through-hole mounting robustness.
• Regulatory compliance — Compliant with the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• Power supplies — Bulk filtering and smoothing in high-voltage DC power supplies where compact, high-voltage capacitance and high ripple handling are required.
• Ballasts and lighting — Energy storage and ripple suppression in lighting ballast circuits, as specifically noted for the UCS series.
• Industrial power electronics — General-purpose DC-link and decoupling duties in industrial control and converter designs that demand long life at elevated temperatures.

Unique Advantages

• High-voltage in a small footprint — 33 µF at 450 V in a compact radial can enables designers to meet voltage and space constraints without larger assemblies.
• Designed for high ripple environments — Clear ripple current ratings at both low and high frequencies help assure reliable operation under realistic load conditions.
• Proven long life at elevated temperature — Engineered for 10000 hours at +105°C, providing predictable end-of-life behavior for long-running equipment.
• Wide operating temperature range — −40°C to +105°C supports deployment across varied industrial ambient conditions.
• Through-hole radial mounting — Radial lead construction with 7.5 mm lead spacing simplifies PCB layout for applications that prefer axial/radial through-hole components for mechanical robustness.
• RoHS compliance — Meets current RoHS requirements for environmentally regulated designs.

Why Choose UCS2W330MHD?

The UCS2W330MHD balances high-voltage capability, compact size, and sustained ripple performance for power-supply and ballast applications. Its 450 V rating, high ripple currents at both 120 Hz and 100 kHz, and 10000-hour endurance at +105°C make it well suited to designers who need a reliable electrolytic solution that fits tight board real estate.

This part is appropriate for engineers specifying durable, long-life capacitors in industrial and lighting systems where predictable end-of-life characteristics and compliance with RoHS are required.

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