UAS2G390MHD

The UAS2G390MHD is a miniature aluminum electrolytic capacitor from Nichicon's UAS series, configured as a radial lead, special-type capacitor. It delivers 39 µF at a 400 V rating with a compact φ16 × 25 mm can and 7.5 mm lead spacing.

Designed for general-purpose electronic applications that require high ripple tolerance, wide operating temperature and enhanced safety under abnormal voltage conditions, the part combines a long endurance rating with RoHS compliance for dependable, production-ready use.

Key Features

• Capacitance & Voltage — 39 µF nominal capacitance with a 400 V rated voltage and a capacitance tolerance of −20% to +20%.
• High Ripple Handling — Specified low-frequency ripple current of 255 mA (120 Hz) and high-frequency ripple current of 408 mA (10 kHz), supported by the UAS series’ high-ripple design.
• Wide Temperature Range & Endurance — Operates from −40°C to +105°C and meets endurance requirements for 2000 hours at 105°C under rated voltage plus rated ripple current.
• Safety Under Abnormal Voltage — Incorporates the UAS series’ improved safety feature for abnormally excessive voltage and a pressure relief vent designed to operate without hazardous flame or dispersion.
• Low Dissipation & Leakage — Maximum tan δ of 0.15 (measured at 20°C, 120 Hz) and a measured leakage current of 724 µA for this part ensure predictable loss and leakage behavior.
• Compact Radial Package — Radial, can-type package with dimensions φ16 × 25 mm and 7.5 mm lead spacing, available in bulk or bag packing for production handling.
• Regulatory — Compliant with RoHS (2011/65/EU, (EU)2015/863).

Typical Applications

• General power electronics — Used where a compact 400 V electrolytic is required for energy storage and DC link smoothing in general-purpose circuits.
• High-ripple environments — Suitable for circuits that experience significant AC ripple due to its specified ripple current ratings at 120 Hz and 10 kHz.
• Wide-temperature deployments — Applicable in equipment that requires reliable operation across −40°C to +105°C.

Unique Advantages

• Designed for ripple-intensive use: Rated ripple currents of 255 mA (120 Hz) and 408 mA (10 kHz) reduce stress on downstream circuitry by handling AC components effectively.
• Robust thermal endurance: 2000 hours at 105°C endurance rating provides predictable long-term behavior in elevated-temperature applications.
• Safety-conscious construction: UAS series safety design and pressure relief vent mitigate hazardous failure modes under abnormal voltage conditions.
• Compact footprint: φ16 × 25 mm can and 7.5 mm lead spacing allow integration into space-constrained assemblies while maintaining high voltage capability.
• Regulatory compliance: RoHS compliance supports adoption in regulated manufacturing environments.

Why Choose UAS2G390MHD?

UAS2G390MHD delivers a balance of high-voltage capability, substantial ripple handling and compact radial packaging from Nichicon’s UAS series. Its specified leakage, dissipation factor, and 2000-hour endurance at 105°C make it well suited for designers needing a reliable 400 V electrolytic for general-purpose power-electronic circuits that operate across a wide temperature range.

This part is appropriate for production designs requiring RoHS-compliant components with predictable electrical behavior and built-in safety considerations. It offers a practical combination of size, performance and longevity for procurement and design teams targeting robust, repeatable results.

Request a quote or submit an inquiry to receive pricing and availability for UAS2G390MHD and to discuss packaging and lead form options for your production needs.