UBR2W121MND

The UBR2W121MND is a Nichicon UBR series aluminum electrolytic capacitor designed for high-voltage, high-ripple applications. It is a miniature, radial-lead, polarized can capacitor with a 450 V rating and 120 µF capacitance intended for general-purpose use including communication base station power supplies.

Key value propositions include high ripple-current capability, long life at elevated temperatures, and a compact radial package that supports through-hole assembly and robust high-voltage filtering.

Key Features

• Electrical — Capacitance & Voltage: 120 µF capacitance with a 450 V rated voltage and ±20% tolerance (120 Hz, 20°C).
• High ripple-current capability: Rated ripple current 850 mArms at 125°C/120 Hz with frequency coefficients that enable up to approximately 1.275 A at 100 kHz.
• Thermal and lifetime performance: Operating temperature range −40°C to +125°C and a specified load life of 5000 hours at 125°C under D.C. bias plus rated ripple current.
• Leakage and loss characteristics: Leakage current defined by I = 0.04CV + 100 (µA) after 1 minute at 20°C; tan δ = 0.24 (120 Hz, 20°C).
• Package and mounting: Radial lead, can-style package (case size 18 × 36 mm; L: 3.6 cm × D: 1.8 cm) with 7.5 mm lead spacing for through-hole implementations.
• Regulatory: Compliant with the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• Communication base station power supplies: Used for high-voltage smoothing and filtering where long life and high ripple capability are required.
• High-voltage power supply filtering: Suitable for general-purpose HV supply decoupling and energy storage in through-hole designs.
• Designs requiring elevated-temperature endurance: Components that must sustain ripple and bias at up to 125°C for extended periods benefit from the UBR2W121MND’s 5000-hour load life rating.

Unique Advantages

• High-voltage capability: 450 V rating enables its use in high-voltage DC circuits without series stacking.
• Proven long-life performance: 5000 hours at 125°C under rated conditions provides predictable aging characteristics for long-term deployments.
• High-frequency ripple support: Frequency coefficient allows increased allowable ripple at higher frequencies (e.g., ~1.275 A at 100 kHz), enabling use in switching and high-frequency applications.
• Compact radial can package: 18 × 36 mm case and 7.5 mm lead spacing deliver a small footprint for through-hole board layouts while maintaining high-voltage capability.
• Clear specification of leakage and dissipation: Defined leakage current formula and tan δ value allow engineers to model performance and safety margins precisely.
• RoHS compliance: Meets current RoHS requirements for environmental and regulatory considerations.

Why Choose UBR2W121MND?

The UBR2W121MND combines a high 450 V rating and 120 µF capacitance with a design focused on ripple endurance and elevated-temperature longevity. Its 5000-hour load-life rating at 125°C and clearly specified ripple current behavior make it suitable for engineers designing high-voltage power supplies and filtering networks that require predictable performance over time.

With a compact radial-can package, defined electrical characteristics (leakage, tan δ), and RoHS compliance, the UBR2W121MND is positioned for procurement into systems where high-voltage smoothing, long-term reliability, and through-hole mounting are priorities.

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