UCY2G121MHD3

The UCY2G121MHD3 is a miniature, high-reliability aluminum electrolytic capacitor designed for radial-lead mounting. It delivers 120 µF capacitance at a 400 V rating with a compact φ18 × 35.5 mm package and 7.5 mm lead spacing.

Targeted for demanding power applications, this AEC-Q200 rated, RoHS-compliant unit offers high ripple-current capability and a long rated life (12,000 hours at 105°C), making it suitable for power supplies, ballasts and automotive power systems requiring robust, long-lived filtering and energy-buffering components.

Key Features

• Capacitance & Voltage — 120 µF nominal capacitance with a 400 V rated voltage and a tolerance of -20% to +20% for reliable energy storage in high-voltage circuits.
• High Ripple Current — Specified ripple current of 960 mA at 120 Hz (low frequency) and 1.92 A at 100 kHz (high frequency), supporting high-load and switching applications.
• High Reliability / Long Life — Endurance rated for 12,000 hours at 105°C under DC bias plus rated ripple current, providing predictable lifetime performance in elevated-temperature environments.
• Temperature Range — Operates from -40°C to 105°C to handle a wide range of environmental conditions.
• Electrical Losses — tan δ = 0.24 (measured at 20°C, 120 Hz) to describe dissipation characteristics under typical test conditions.
• Leakage Current — Specified leakage current 2,020 µA to help evaluate standby losses and insulation characteristics after rated-voltage application.
• Package & Mounting — Radial-lead can type with φ18 × 35.5 mm dimensions and 7.5 mm lead spacing (±0.5 mm), available in bulk or bag packing for through-hole assembly.
• Automotive-Grade Qualification — AEC-Q200 rated and marked as suitable for automotive applications where that qualification is required.
• Regulatory Compliance — RoHS compliant per provided product data.

Typical Applications

• Power Supplies — Smoothing, bulk energy storage and ripple attenuation for high-voltage AC/DC and DC/DC converter front-ends.
• Ballasts and Lighting Drivers — Designed for ballast applications where miniature size and high ripple handling are needed.
• Automotive Power Electronics — Suitable for automotive power systems that require AEC-Q200 qualified components with long life at elevated temperatures.

Unique Advantages

• High ripple-current capability: Supports both low- and high-frequency ripple (960 mA @120 Hz; 1.92 A @100 kHz), enabling use in switching and high-load power circuits.
• Long rated lifetime at elevated temperature: 12,000 hours at 105°C under rated conditions provides predictable durability in hot operating environments.
• AEC-Q200 qualification: Offers the traceable qualification status required for many automotive and transport designs.
• Compact radial-can form factor: φ18 × 35.5 mm package with 7.5 mm lead spacing balances high voltage rating with a small footprint for through-hole assemblies.
• Regulatory compliance: RoHS-compliant construction supports global environmental requirements.

Why Choose UCY2G121MHD3?

UCY2G121MHD3 from Nichicon is positioned for engineers who need a compact, high-voltage electrolytic capacitor with demonstrable ripple-current capability and long-term thermal endurance. Its combination of 400 V rating, 120 µF capacitance and 12,000-hour life at 105°C make it a practical choice for power supplies, ballasts and automotive power subsystems that must withstand continuous thermal and electrical stress.

With AEC-Q200 qualification, RoHS compliance and radial-lead packaging, this part suits production designs that require automotive-grade reliability, predictable end-of-life behavior and straightforward through-hole assembly. It is offered in bulk or bag packing and is in mass production for supply continuity.

If you would like pricing, availability or technical support for UCY2G121MHD3, request a quote or contact sales to discuss quantities, lead times and application-specific requirements.