UHW1V181MPD

The UHW1V181MPD from Nichicon is a miniature, high-reliability aluminum electrolytic capacitor in a radial lead can (UHW series). It delivers 180 µF at 35 V in an 8 × 11.5 mm package with radial leads and 3.5 mm lead spacing, optimized for applications that require compact bulk capacitance with elevated ripple handling.

Designed for embedded and industrial systems, this capacitor combines low impedance, high ripple-current capability, and long endurance for reliable power smoothing, decoupling and filtering across a −40°C to +105°C operating range.

Key Features

• Capacitance & Voltage — 180 µF nominal capacitance rated at 35 V, with capacitance tolerance −20% to +20% (measured at 120 Hz, 20°C).
• Low-loss Performance — Tangent of loss angle (tan δ) of 0.11 when measured at 20°C and 120 Hz, delivering controlled ESR for stable AC performance.
• High Ripple Current Handling — Rated low-frequency ripple current of 480 mA (120 Hz) and high-frequency ripple current of 1.2 A (10 kHz), suited for both mains-frequency and switching regulator environments.
• Frequency Ripple Current Coefficients — Frequency coefficients per the UHW series for 47–180 µF: 120 Hz = 0.40, 1 kHz = 0.75, 10 kHz = 0.90, enabling designers to scale ripple ratings by frequency.
• Long Endurance — Endurance of 9,000 hours at 105°C (applicable for the 8 × 11.5 mm case size in the 10–50 V range), supporting extended high-temperature operation.
• Leakage & Impedance — Specified leakage current of 63 µA and impedance approximately 360 mΩ, balancing standby loss and dynamic performance.
• Mechanical & Mounting — Radial lead mounting with 3.5 mm nominal lead spacing (±0.5 mm tolerance) and compact dimensions φ8 × 11.5 mm for space-constrained layouts.
• RoHS Compliant Packaging — Available in bulk (no terminal forming) or bag packing; manufactured RoHS compliant.

Typical Applications

• Switching Power Supplies — Input/output filtering and bulk energy storage where low impedance and high ripple-current capability reduce voltage ripple around DC–DC converters.
• Power Filtering for Industrial Controls — Smoothing and decoupling in motor drives, control modules, and other industrial electronics operating across −40°C to +105°C.
• Embedded Systems and Telecom Equipment — Local bulk capacitance for regulators and decoupling in compact assemblies where radial-lead through-hole components are required.

Unique Advantages

• Compact high-capacitance package — 180 µF in an 8 × 11.5 mm can enables substantial bulk capacitance without consuming large PCB area.
• Balanced AC and DC performance — Low tan δ and specified impedance (360 mΩ) help maintain stability and minimize heating under ripple conditions.
• Frequency-aware ripple ratings — Published frequency coefficients allow designers to adjust ripple expectations across 120 Hz to 10 kHz operating conditions.
• Extended high-temperature life — 9,000-hour endurance at 105°C for the 8 × 11.5 mm case provides predictable lifetime in elevated-temperature applications.
• Through-hole radial configuration — Radial leads with defined spacing and tolerance simplify prototyping, repairability and mechanical robustness in rugged assemblies.
• Regulatory compliance — RoHS-compliant construction supports environmental requirements for electronic equipment.

Why Choose UHW1V181MPD?

The UHW1V181MPD delivers a practical combination of bulk capacitance, high ripple-current capability and long-term stability in a compact radial-lead package. Its low-loss characteristics (tan δ = 0.11 at 20°C/120 Hz) and defined impedance make it suitable where predictable AC performance and thermal endurance are required.

This part is well suited for engineers designing power-supply filters, regulator decoupling networks, and industrial control electronics that demand reliable operation from −40°C to +105°C. With series-backed datasheet specifications and RoHS compliance, it provides a robust choice for production designs and long-life deployments.

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