UCP2W121MHD6

The UCP2W121MHD6 from Nichicon's UCP series is a radial-lead, polarized aluminum electrolytic capacitor engineered for high-voltage, miniature applications. It delivers 120 µF capacitance at a 450 V rating in a compact φ18 × 31.5 mm can with 7.5 mm lead spacing.

Designed for general-purpose use where high voltage handling, long operational life and reliable ripple performance are required, this part is suited to designs that demand sustained operation up to 105°C and long-term endurance under DC bias and ripple stress.

Key Features

• High Voltage — Rated for 450 V to support high-voltage DC smoothing and energy storage in compact form factors.
• Capacitance & Tolerance — 120 µF nominal capacitance with tolerance of −20% to +20% for predictable bulk capacitance under rated conditions.
• Long Life Endurance — Qualified for 10,000 hours at 105°C with DC bias plus rated ripple current, meeting the UCP series long-life assurance criteria.
• Ripple Current Capability — Handles 800 mA at 120 Hz and 1.2 A at 10 kHz, with frequency-dependent coefficients documented for use across common ripple frequencies.
• Loss Tangent (tan δ) — Maximum tan δ of 0.24 measured at 20°C, 120 Hz and rated voltage (450 V), supporting stable dissipation characteristics.
• Leakage Current — Specified leakage current of 2260 µA after 1 minute at 20°C and rated voltage, based on I = 0.04CV + 100 (µA).
• Compact Radial Package — φ18 × 31.5 mm can with 7.5 mm lead spacing (±0.5 mm), available in bulk/no terminal forming or bag packing for through-hole assemblies.
• Wide Operating Temperature — Rated for −40°C to +105°C to cover elevated-temperature applications.

Typical Applications

• General high-voltage DC smoothing — Bulk energy storage and smoothing in power supplies and DC link circuits that require a 450 V rated capacitor.
• Ripple filtering — Use where controlled ripple current handling is needed at both low (120 Hz) and high (10 kHz) frequencies, leveraging the specified ripple ratings.
• Elevated-temperature systems — Circuits operating continuously at elevated temperatures up to 105°C where long-term endurance (10,000 h) is required.

Unique Advantages

• High-voltage capability: 450 V rating enables application in higher DC voltage rails without up-rating multiple lower-voltage parts.
• Long-term reliability: 10,000-hour endurance at 105°C under DC bias plus ripple current reduces maintenance and replacement frequency in continuous-duty applications.
• Frequency-aware ripple performance: Separate ripple specifications for 120 Hz (800 mA) and 10 kHz (1.2 A) allow designers to size capacitors according to both low- and high-frequency load conditions.
• Predictable electrical loss: tan δ ≤ 0.24 at 20°C/120 Hz provides a verifiable dissipation characteristic for thermal and loss budgeting.
• Compact radial form: φ18 × 31.5 mm can with standard 7.5 mm lead spacing simplifies through-hole board layouts while conserving board area.
• Clear leakage specification: Leakage current defined by I = 0.04CV + 100 (µA) and provided value (2260 µA) aids margining in power-budget calculations.

Why Choose UCP2W121MHD6?

UCP2W121MHD6 combines a high 450 V rating, substantial 120 µF capacitance and long 10,000-hour endurance at 105°C in a miniature radial-can package from Nichicon's UCP series. Its documented ripple current capability across frequencies, controlled tan δ, and defined leakage behavior make it an engineering-friendly choice where predictable high-voltage smoothing and durable performance are priorities.

This part is ideal for designers specifying general-purpose high-voltage capacitors for power electronics, DC link smoothing and other elevated-temperature applications that require reliable, long-life aluminum electrolytic components with straightforward through-hole mounting and known electrical characteristics.

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