UAS2G121MHD

The UAS2G121MHD is a miniature, radial-lead aluminum electrolytic capacitor from Nichicon's UAS series. It delivers 120 μF capacitance at a 400 V rating in a compact φ18×40 mm can with 7.5 mm lead spacing, designed for general-purpose high-voltage applications.

This part emphasizes high ripple-current capability, wide operating temperature range (−40°C to +105°C) and a 2000-hour endurance at 105°C, making it suitable for designs that require reliable bulk energy storage and filtering under elevated temperature and ripple conditions.

Key Features

• Capacitance & Voltage — 120 μF nominal capacitance with a 400 V rated voltage and ±20% tolerance.
• High Ripple Current — Rated ripple currents of 540 mA at 120 Hz and 864 mA at 10 kHz support handling of both low- and high-frequency ripple components.
• Wide Temperature Range & Endurance — Operates from −40°C to +105°C with a specified life of 2000 hours at 105°C under rated ripple and DC bias.
• Safety Features — UAS series includes improved permissible abnormal voltage characteristics and a pressure relief vent to mitigate hazardous failure modes.
• Radial Lead, Compact Package — φ18×40 mm can with 7.5 mm lead spacing in a radial, can-style package for through-hole assembly and bulk mounting.
• Leakage and Loss Characteristics — Leakage current specified per datasheet (0.04CV+100 μA or less after 1 minute at 20°C) and tan δ max 0.15 at 120 Hz for the 400 V rating.
• Compliance & Availability — RoHS compliant and available in bulk packaging; listed as mass production status.

Typical Applications

• High-voltage power supplies — Bulk smoothing and filtering where a 400 V rating and substantial ripple-current capability are required.
• Power conversion and DC link circuits — Energy storage and ripple handling for converters that operate across a wide temperature range.
• Industrial equipment — General-purpose use in industrial electronics benefitting from the 2000-hour life at 105°C and −40°C to +105°C operating range.

Unique Advantages

• High-voltage capability: 400 V rating enables use in higher-voltage DC systems without additional series components.
• Designed for ripple: Specified ripple currents at both low and high frequencies (540 mA at 120 Hz; 864 mA at 10 kHz) reduce thermal stress under AC-loading conditions.
• Durable under elevated temperature: 2000 hours endurance at 105°C ensures predictable performance in heat-stressed environments.
• Compact, through-hole form factor: φ18×40 mm radial can with 7.5 mm lead spacing balances size and bulk capacitance for PCB-mounted applications.
• Safety-oriented design: Permissible abnormal voltage features and a pressure relief vent enhance operational safety.
• Production-ready and compliant: RoHS compliant with bulk packaging and mass-production availability for volume designs.

Why Choose UAS2G121MHD?

UAS2G121MHD positions itself as a reliable, general-purpose high-voltage electrolytic capacitor for designs that require solid bulk capacitance, significant ripple-current handling, and extended operation at elevated temperatures. As part of Nichicon’s UAS series, it combines miniature packaging with safety-focused features and documented endurance.

This part is suited to engineers and procurement teams designing higher-voltage power electronics and industrial systems that need verifiable specifications for capacitance, ripple capability, temperature range and lifetime, along with RoHS compliance and mass-production availability.

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