UCY2E121MHD9

The UCY2E121MHD9 is a miniature, high-reliability aluminum electrolytic capacitor in a radial lead can. Designed for high ripple environments, it delivers 120 µF at 250 V with a compact φ12.5 × 35.5 mm package and 5 mm lead spacing.

This part targets applications requiring long endurance and stable performance across a wide temperature range (–40 °C to 105 °C), with AEC-Q200 qualification and RoHS compliance supporting demanding automotive and industrial power designs.

Key Features

• Capacitance and Voltage — 120 µF rated capacitance with a 250 V rated voltage and a capacitance tolerance of −20% to +20%.
• High Ripple Current Capability — Low-frequency ripple current of 785 mA at 120 Hz and high-frequency ripple current of 1.57 A at 100 kHz to handle AC stress in power circuits.
• Long Endurance — Rated for 12,000 hours at 105 °C, providing extended operational life under high-temperature load conditions.
• Temperature and Loss Characteristics — Operating temperature range of −40 °C to 105 °C and tan δ (DF) of 0.20 measured at 20 °C, 120 Hz for stable dissipation behavior.
• Radial Lead Package — Compact radial can: diameter φ12.5 mm, length 35.5 mm, lead spacing 5.0 mm (±0.5 mm), supplied in bulk or bag packing (no terminal forming).
• Leakage Current — Specified leakage current of 1300 µA for predictable bias characteristics after application of rated voltage.
• Qualification and Compliance — AEC-Q200 rated and RoHS compliant for regulated environments and automotive applications.

Typical Applications

• Automotive Power Systems — Energy storage and smoothing in vehicle power modules, benefiting from AEC-Q200 qualification and 12,000-hour endurance at 105 °C.
• Power Supplies and Ballasts — Bulk and smoothing capacitor for DC power supplies and lighting ballasts, where high ripple current handling is required.
• High-Ripple Power Electronics — Circuits with significant AC ripple or switching stress that require durable capacitance and controlled dissipation factor.

Unique Advantages

• High ripple tolerance: Specified ripple currents (785 mA @120 Hz, 1.57 A @100 kHz) reduce thermal stress in high-AC environments and support stable operation under load.
• Extended high-temperature life: 12,000-hour endurance at 105 °C enables longer maintenance intervals and predictable aging for long-lived systems.
• Automotive-grade qualification: AEC-Q200 rating supports integration into vehicle electronics that require qualification-level components.
• Compact radial form factor: φ12.5 × 35.5 mm can with 5 mm lead spacing provides a small footprint for dense PCB layouts while preserving through-hole robustness.
• Regulatory compliance: RoHS compliance ensures use in regulated markets without additional material constraints.
• Clear supply options: Available in bulk (no terminal forming) or bag packing to match assembly and inventory preferences.

Why Choose UCY2E121MHD9?

UCY2E121MHD9 balances compact packaging with high ripple capability and long-term reliability, making it suitable for power supply smoothing, ballast circuits, and automotive power modules that demand stable performance at elevated temperatures. Its AEC-Q200 qualification and RoHS compliance provide a verifiable basis for use in regulated, high-reliability designs.

Engineers specifying this capacitor will benefit from predictable leakage and dissipation characteristics, a robust endurance rating (12,000 hours at 105 °C), and a small radial can that simplifies layout while meeting the thermal and electrical demands of modern power electronics.

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