UHW1E182MHD

The UHW1E182MHD is a miniature, high-reliability aluminum electrolytic capacitor in Nichicon’s UHW series. It is a radial-lead, polarized capacitor rated at 25 V with 1800 µF capacitance and a compact φ12.5 × 25 mm can.

Designed for general-purpose electronics that require high ripple-current handling and low impedance across frequency, this part targets applications that benefit from compact size, long endurance and wide operating temperature range.

Key Features

• Capacitance & Voltage — 1800 µF nominal capacitance at a rated voltage of 25 V with tolerance −20% to +20%.
• Low impedance — Rated impedance of 45 mΩ, helping reduce voltage ripple in high-current applications.
• High ripple-current capability — Low-frequency ripple current 1.92 A (120 Hz) and high-frequency ripple current 3.20 A (10 kHz), supporting demanding power filtering tasks.
• Electrical loss characteristics — Tangent of loss angle (tan δ) of 0.13 measured at 20°C, 120 Hz for the 25 V rating.
• Leakage current — Specified leakage current of 450 µA after standard application of rated voltage.
• Reliability and lifetime — Endurance rated for 10,000 hours at 105°C under specified DC bias plus rated ripple current.
• Operating environment — Wide operating temperature range from −40°C to +105°C.
• Compact radial package — φ12.5 mm diameter × 25 mm length can with 5.0 mm lead spacing (±0.5 mm); available in bulk (no terminal forming) or bag packing.
• Compliance — RoHS compliant.

Typical Applications

• Power supply filtering — Use as bulk or output filter capacitance where 25 V rating and high ripple capability smooth supply rails in general-purpose electronics.
• DC–DC converter decoupling — Low impedance and high-frequency ripple current handling support decoupling and energy buffering in converter circuits.
• Hold‑up and smoothing — Compact size and 1800 µF capacitance provide board-level energy storage for short-term hold-up requirements in compact designs.

Unique Advantages

• High ripple handling in a small footprint — 1.92 A (120 Hz) and 3.20 A (10 kHz) ripple ratings combined with a φ12.5 × 25 mm case reduce board space without compromising ripple performance.
• Low impedance for improved ripple suppression — 45 mΩ impedance helps lower ripple voltage and improves overall power integrity.
• Long high-temperature endurance — 10,000 hours at 105°C supports designs requiring sustained elevated-temperature operation.
• Wide operating temperature range — −40°C to +105°C operation allows use across a broad set of environmental conditions.
• Production-ready packaging — Available in bulk (no terminal forming) or bag packing for straightforward assembly handling and procurement.
• RoHS compliant — Aligns with environmental compliance requirements for lead-free assemblies.

Why Choose UHW1E182MHD?

UHW1E182MHD combines high capacitance with a compact radial can and strong ripple-current capability, making it well suited for general-purpose power conditioning, decoupling and hold-up applications where board space and thermal endurance matter. The UHW series design highlights lower impedance at higher frequencies and a robust endurance specification of 10,000 hours at 105°C.

This capacitor is appropriate for engineers and procurement teams specifying reliable, compact aluminum electrolytic solutions for mid-voltage (25 V) circuits. Its documented electrical characteristics—impedance, tan δ, leakage current and ripple ratings—allow straightforward performance trade-offs during design and validation.

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