UCS2W390MND9

The UCS2W390MND9 is an aluminum electrolytic capacitor from Nichicon's UCS series. It is a miniature, radial-lead polarized capacitor designed for high ripple current and long operational life in demanding power applications.

Targeted use cases include power supplies and ballast applications as well as general-purpose electronic equipment where high voltage handling and extended life at elevated temperature are required. The device is RoHS compliant.

Key Features

• Electrical Performance — 39 µF capacitance at a 450 V rated voltage, with capacitance tolerance of ±20% (–20%~20%).
• High Ripple Current — Rated ripple performance of 410 mA at 120 Hz and 820 mA at 100 kHz, supporting applications with significant AC ripple on DC rails.
• Long-Life Reliability — Designed for endurance with a load-life rating of 10,000 hours at +105°C (8,000 hours for specific smaller case sizes noted in the series data).
• Temperature Range — Operable from –40°C to +105°C for use across a wide ambient range.
• Package and Mounting — Radial lead, can-style package with 5 mm lead spacing and a compact size (L × D: 5 × 1 cm) for board-level installations.
• Polarized Design — Polar capacitor intended for DC applications requiring correct polarity orientation.
• RoHS Compliant — Meets RoHS directive requirements (2011/65/EU, (EU)2015/863).

Typical Applications

• Power Supplies — Bulk and filtering capacitor for high-voltage DC rails, leveraging high ripple-current capability and long life at elevated temperature.
• Ballasts — Suited for ballast circuits where high-voltage rating and sustained ripple handling improve reliability.
• General-Purpose Electronic Equipment — Provides high-voltage filtering and energy storage in industrial and commercial electronic designs.

Unique Advantages

• High Voltage Rating: 450 V rating enables use in higher-voltage DC systems without series stacking or complex topologies.
• Elevated Ripple Capability: Measured ripple current up to 820 mA at 100 kHz reduces heating and improves performance in switch-mode and high-frequency circuits.
• Extended High-Temperature Life: Rated endurance up to 10,000 hours at +105°C supports longer maintenance intervals and predictable aging in hot environments.
• Compact Radial Can: Miniature radial package with 5 mm lead spacing simplifies board layout where space is limited.
• Wide Operating Range: –40°C to +105°C rating covers a broad set of environmental conditions for industrial applications.
• RoHS Compliance: Conforms to current RoHS directives for use in regulated products and supply chains.

Why Choose UCS2W390MND9?

The UCS2W390MND9 combines a high 450 V rating, robust ripple-current handling, and a long high-temperature life in a miniature radial can. It is well suited for designers who need dependable high-voltage filtering and energy storage in power supplies, ballasts, and other general-purpose electronic equipment.

Manufactured by Nichicon as part of the UCS series, this capacitor offers a clear specification set—capacitance, ripple, temperature range, and life—making it straightforward to evaluate for systems where long-term reliability and sustained ripple performance are priorities.

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