UCYW6121MHD

The UCYW6121MHD is a miniature, radial-lead aluminum electrolytic capacitor from Nichicon’s UCY high-reliability series. It delivers 120 µF capacitance at a 420 V rating in a compact φ18 × 40 mm can with 7.5 mm lead spacing.

Designed for high-ripple, long-life applications, this polarized capacitor is AEC-Q200 qualified and RoHS compliant, making it suitable for demanding power-supply and automotive power-electronics environments that require extended endurance at elevated temperature.

Key Features

• Electrical Performance — 120 µF capacitance at a rated voltage of 420 V with ±20% tolerance, providing stable energy storage for high-voltage power circuits.
• Low Loss (tan δ) — tan δ 0.24 measured at 20°C, 120 Hz and 420 V, supporting predictable dissipation characteristics under rated conditions.
• High Ripple-Current Capability — Low-frequency ripple current 930 mA at 120 Hz and high-frequency ripple current 1.86 A at 100 kHz to support switching and high-frequency power stages.
• Leakage Current — Specified leakage current 2116 µA, measured per the product data.
• Long Endurance — Life rating of 12,000 hours at 105°C with DC bias plus rated ripple current, suitable for prolonged operation in hot environments.
• Temperature Range & Reliability — Operating temperature −40°C to +105°C and AEC-Q200 qualification for reliability-focused designs.
• Package & Mounting — Radial lead can (φ18 × 40 mm), lead spacing 7.5 mm (±0.5 mm), available in bulk or bag packing for through-hole assembly.
• Compliance — RoHS compliant, aligning with modern environmental requirements.

Typical Applications

• Automotive power electronics — Energy storage and filtering in vehicle power systems where AEC-Q200-qualified components are required.
• Power supplies — Bulk smoothing and ripple filtering for high-voltage DC power supplies and converters.
• Ballasts and lighting drivers — High-ripple, long-life operation suited to ballast and lamp-driver circuits.

Unique Advantages

• High ripple tolerance: Supports both low- and high-frequency ripple current (930 mA @120 Hz, 1.86 A @100 kHz), helping maintain stability in switching power stages.
• Extended high-temperature life: 12,000-hour endurance at 105°C provides predictable long-term performance in elevated-temperature installations.
• AEC-Q200 qualified: Meets automotive-grade reliability expectations for use in robust designs.
• Compact radial package: φ18 × 40 mm can with standard 7.5 mm lead spacing simplifies through-hole placement while preserving capacitance and voltage capability.
• Regulatory readiness: RoHS compliance supports environmental and regulatory requirements without additional component filtering.

Why Choose UCYW6121MHD?

The UCYW6121MHD combines high-voltage capability, substantial ripple-current handling, and long endurance in a compact radial-lead package, making it well suited for designers of automotive power electronics, high-voltage power supplies, and ballast/driver circuits. Its AEC-Q200 qualification and RoHS compliance deliver a balance of reliability and regulatory conformance for production designs.

For projects that require verified lifetime performance at elevated temperatures and predictable electrical characteristics (tan δ, leakage current, and ripple ratings), this Nichicon UCY-series part provides a specification-driven choice with manufacturing continuity and proven series-level data.

Request a quote or submit a pricing and availability inquiry for UCYW6121MHD to receive detailed lead-time and volume pricing information.