UCYW6390MHD

The UCYW6390MHD is a radial lead aluminum electrolytic capacitor from Nichicon's UCY series. It provides a 39 µF capacitance at a 420 V rated voltage in a compact φ12.5 × 30.5 mm can, designed for high ripple current and long-life operation.

Engineered for power electronics and automotive applications, this part delivers elevated ripple-current capability and endurance at elevated temperature, making it suitable for high-voltage power supplies, ballasts, and automotive power designs that require reliable bulk energy storage.

Key Features

• Capacitance & Voltage — 39 µF nominal capacitance with a 420 V rated voltage and ±20% tolerance, providing stable energy storage for high-voltage circuits.
• High ripple-current performance — Rated ripple current of 430 mA at 120 Hz and 860 mA at 100 kHz to handle AC stress and reduce temperature rise in filtering and smoothing applications.
• Long endurance at elevated temperature — Designed for 12,000 hours life at 105°C under D.C. bias plus rated ripple current, supporting extended reliability in hot operating environments.
• Wide operating temperature range — Specified for −40°C to +105°C to accommodate broad thermal environments.
• Loss characteristics — Tan δ (DF) max 0.24 measured at 20°C, 120 Hz, supporting predictable dissipation behavior in design calculations.
• Leakage current — Specified leakage current of 755.2 µA (per product data), allowing designers to budget standby and bleed currents accurately.
• Compact radial package — φ12.5 mm diameter × 30.5 mm length can with 5.0 mm lead spacing (±0.5 mm), available in bulk or bag packing for through-hole assembly.
• AEC-Q200 qualification — Rated to AEC-Q200 (see product documentation for details), supporting use in automotive-grade designs.
• RoHS compliant — Meets RoHS requirements for materials compliance.

Typical Applications

• Automotive power electronics — Bulk smoothing and energy storage in DC–DC converters and other on-vehicle power modules where high voltage and long endurance are required.
• Power supplies — Filtering and energy buffering in high-voltage power supplies and industrial power modules that require elevated ripple-current capability.
• Lighting ballasts — Energy storage and ripple handling in ballasts and other high-voltage lighting control circuits, as noted in product documentation.

Unique Advantages

• 420 V rating for high-voltage designs: Supports circuits that require high DC bus voltages without series stacking.
• Measured ripple-current specs at low and high frequencies: 430 mA at 120 Hz and 860 mA at 100 kHz enable designers to size thermal margins and cooling accordingly.
• Long life at elevated temperature: 12,000 hours at 105°C under rated conditions provides predictable lifetime behavior in thermally demanding applications.
• Compact radial can package: Small φ12.5 × 30.5 mm footprint with 5 mm lead spacing simplifies placement in through-hole assemblies where board area is constrained.
• AEC-Q200 qualification: Documented qualification supports specification for automotive and other demanding system requirements.
• Clear electrical characteristics: Specified tan δ, leakage, and tolerance enable accurate design trade-offs for filtering, timing, and energy storage.

Why Choose UCYW6390MHD?

The UCYW6390MHD combines a high 420 V rating, substantial ripple-current capability, and long endurance at 105°C in a compact radial electrolytic package. It is positioned for engineers designing high-voltage power supplies, lighting ballasts, and automotive power electronics where predictable lifetime and thermal behavior are required.

With defined loss angle, leakage, and tolerance specifications, this capacitor lets you size margins and thermal management with confidence, reducing iteration during design and supporting robust end-product operation over extended service life.

Request a quote or contact sales to discuss pricing, availability, and lead times for UCYW6390MHD.