UCY2E121MHD3

The UCY2E121MHD3 from Nichicon is a radial-lead aluminum electrolytic capacitor in the UCY series, rated 120 µF at 250 V. It combines a compact φ12.5 mm × 40 mm can with high ripple-current capability and long endurance for demanding power applications.

Designed for power supply and ballast applications and AEC-Q200-qualified for automotive use, this capacitor targets engineers who need robust smoothing, filtering and energy-buffering components in harsh environments down to −40 °C and up to 105 °C.

Key Features

• Capacitance & Voltage — 120 µF nominal capacitance with a rated voltage of 250 V and tolerance of −20% to +20%.
• High ripple-current capability — Low-frequency ripple current 890 mA at 120 Hz and high-frequency ripple current 1.78 A at 100 kHz, suitable for heavy smoothing and filtering loads.
• Loss characteristics — Tangent of loss angle (tan δ) ≤ 0.20 measured at 20 °C, 120 Hz, indicating controlled dissipation for stable performance.
• Long life at elevated temperature — Rated endurance of 12,000 hours at 105 °C under DC bias plus rated ripple current, supporting extended service life in hot operating environments.
• Wide operating temperature — Specified for −40 °C to +105 °C operation to accommodate a broad range of thermal conditions.
• Compact radial can — φ12.5 mm diameter × 40 mm length with 5.0 mm lead spacing (±0.5 mm), provided as a radial lead (can) package for through-hole assemblies.
• Leakage current — Specified leakage current of 1,300 µA for predictable standby and power-loss behavior.
• Compliance & packaging — RoHS-compliant, AEC-Q200 qualified, and available in bulk (no terminal forming) or bag packing for production assembly.

Typical Applications

• Power supplies — Smoothing and bulk energy storage in DC power supplies where high ripple handling and long life are required.
• Ballasts and lighting control — Filtering and energy buffering in ballast circuits as noted in product literature.
• Automotive power modules — Use in automotive power systems enabled by AEC-Q200 qualification and broad temperature rating.

Unique Advantages

• High ripple handling — 890 mA (120 Hz) and 1.78 A (100 kHz) ripple ratings reduce thermal stress and support reliable filtering under heavy AC components.
• Extended high-temperature life — 12,000-hour endurance at 105 °C provides predictable longevity in elevated-temperature installations.
• Tight dissipation control — tan δ ≤ 0.20 at 120 Hz limits dielectric loss, helping maintain efficiency and thermal stability.
• Automotive-grade qualification — AEC-Q200 qualification supports use in transportation applications that require industry-recognized reliability standards.
• Compact footprint — φ12.5 mm × 40 mm radial-can format with standard 5.0 mm lead spacing fits space-constrained through-hole designs.
• Regulatory compliance — RoHS conformity simplifies environmental compliance for production programs.

Why Choose UCY2E121MHD3?

UCY2E121MHD3 delivers a balanced combination of capacitance, voltage rating and ripple-current capability in a compact radial package, aimed at engineers needing reliable smoothing and filtering with predictable long-term behavior. Its 12,000-hour endurance at 105 °C, controlled dissipation (tan δ), and AEC-Q200 qualification make it a solid choice for automotive and industrial power designs that operate across −40 °C to +105 °C.

This part suits designs where durability, ripple tolerance and compact through-hole packaging are priorities, providing a straightforward integration path with options for bulk or bag packing in production quantities.

Request a quote or contact sales to discuss pricing, availability and volume options for UCY2E121MHD3.