UHW1E181MED

The UHW1E181MED is a miniature, radial-lead aluminum electrolytic capacitor from Nichicon's UHW series designed for high ripple current and high reliability in general-purpose electronic circuits. It delivers 180 µF capacitance at a rated voltage of 25 V in a compact φ6.3 × 11 mm can with 2.5 mm lead spacing.

Engineered for applications that require low impedance at higher frequencies and extended endurance, this capacitor supports operation from −40°C to +105°C with a rated life of 7000 hours at 105°C and is RoHS compliant.

Key Features

• Miniature radial can package — Compact φ6.3 × 11 mm size with 2.5 mm lead spacing (±0.5 mm) for space-constrained through-hole designs.
• Rated capacitance and tolerance — 180 µF with capacitance tolerance of −20% to +20% at 120 Hz, 20°C for predictable bulk energy storage.
• 25 V rated voltage — Suitable for low-voltage power rails and decoupling in general-purpose electronics.
• High ripple-current capability — 280 mA at 120 Hz (low frequency) and 700 mA at 10 kHz (high frequency), enabling effective smoothing under varying switching conditions.
• Low dissipation factor — tanδ = 0.13 measured at 20°C, 120 Hz, supporting lower losses in filtering and decoupling roles.
• Leakage current — 45 µA specified, helping maintain efficiency in steady-state applications.
• Extended endurance — 7000 hours at 105°C, providing long-term reliability in elevated-temperature environments.
• Regulatory compliance — RoHS compliant for use in assemblies requiring restricted-substance conformity.
• Packaging options — Available in bulk (no terminal forming) and bag packing to suit assembly and inventory workflows.

Typical Applications

• Power supply smoothing: Use on low-voltage rails to provide bulk decoupling and ripple reduction, leveraging 180 µF at 25 V and high ripple-current ratings.
• DC–DC converter output filters: Compact size and strong high-frequency ripple capability make it suitable for decoupling outputs in switching regulator circuits.
• Embedded and general-purpose electronics: Through-hole radial form factor for reliable placement in control boards and industrial modules operating across −40°C to +105°C.

Unique Advantages

• Compact footprint with meaningful capacitance: φ6.3 × 11 mm provides 180 µF storage in a small can, helping reduce board area without sacrificing bulk capacitance.
• High-frequency performance: Lower impedance at higher frequencies and a 700 mA ripple rating at 10 kHz improve filtering performance in switching environments.
• Designed for elevated-temperature endurance: Rated for 7000 hours at 105°C, enabling longer service life in warmer operating conditions.
• Predictable electrical characteristics: Specified tanδ (0.13 at 20°C, 120 Hz) and defined leakage current (45 µA) allow reliable circuit design and margining.
• RoHS compliant: Simplifies regulatory compliance for assemblies targeting regions with restricted-substance requirements.

Why Choose UHW1E181MED?

The UHW1E181MED positions itself as a compact, high-ripple, high-reliability radial electrolytic capacitor for designers who need robust bulk capacitance in space-constrained, through-hole applications. Its combination of 180 µF at 25 V, strong high-frequency ripple capability, and a wide operating temperature range (−40°C to +105°C) makes it appropriate for general-purpose power filtering and decoupling in embedded and industrial designs.

With defined loss and leakage characteristics, RoHS compliance, and packaging choices that fit production workflows, this part supports predictable integration and long-term operation where a durable, small-form electrolytic solution is required.

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