LGUW6181MELZ

The LGUW6181MELZ is a snap-in terminal aluminum electrolytic capacitor from Nichicon's LGU series, offering 180 µF capacitance at a 420 V rated voltage in a radial can snap-in package (φ22 × 45 mm). Designed for general-purpose power electronics, it delivers a combination of high-voltage capability, substantial capacitance, and robust ripple handling for applications that require reliable bulk filtering and energy smoothing.

Key value propositions include rated endurance under heavy ripple at elevated temperature (3000 hours at 105°C), measurable low-frequency and high-frequency ripple current specifications, and RoHS compliance for environmental compatibility.

Key Features

• Electrical Performance 180 µF capacitance with a 420 V rated voltage and ±20% tolerance, providing reliable bulk capacitance for high-voltage circuits.
• High Ripple Capability Specified ripple current handling of 950 mA at 120 Hz (low frequency) and 1.359 A at 50 kHz (high frequency) to support both mains-frequency and switching applications.
• Loss and Leakage Characteristics Dissipation factor (tanδ) of 0.15 measured at 20°C, 120 Hz, and a leakage current of 820 µA, enabling predictable loss and leakage performance in designs.
• Thermal Endurance Rated for operation from −25°C to +105°C with an endurance specification of 3000 hours at 105°C under rated ripple and DC bias conditions.
• Package and Mounting Radial can with snap-in terminals (φ22 × 45 mm) for secure PCB mounting and mechanical stability in through-hole assemblies.
• Environmental Compliance RoHS compliant, supporting regulatory requirements for restricted substances.

Typical Applications

• Power supply filtering — Provides bulk capacitance and ripple current handling for high-voltage power supplies and DC bus smoothing in commercial and industrial equipment.
• Switch-mode power converters — 420 V rating and specified high-frequency ripple current make it suitable for energy storage and filtering in switching stages.
• Industrial electronics — Durable performance at elevated temperature (105°C) and 3000-hour endurance supports sustained operation in demanding environments.

Unique Advantages

• Rated for prolonged high-temperature operation — 3000 hours endurance at 105°C under rated conditions delivers predictable long-term behavior in hot operating environments.
• High-voltage capability — 420 V rating enables use in higher-voltage DC systems without series stacking.
• Dual-frequency ripple specification — Explicit low-frequency (120 Hz) and high-frequency (50 kHz) ripple current ratings allow designers to evaluate performance across a range of switching frequencies.
• Snap-in mounting for robust assembly — Radial, snap-in can construction (φ22 × 45 mm) affords secure PCB retention and simplified board insertion for volume production.
• RoHS compliant — Meets RoHS requirements for restricted substances, easing regulatory compliance for finished products.
• Production-ready packaging — Supplied in tray packing and available as a mass-production part to support manufacturing throughput.

Why Choose LGUW6181MELZ?

LGUW6181MELZ combines high-voltage rating, substantial capacitance, and defined ripple-current capability in a snap-in aluminum electrolytic package engineered for general-purpose power electronics. Its 3000-hour endurance at 105°C under rated ripple current makes it a solid choice where long-term thermal stability and predictable aging are important considerations.

This part is well suited for engineers and purchasers specifying capacitors for high-voltage filtering, DC bus smoothing, and other power-focused roles in commercial and industrial designs that require RoHS compliance and production-ready packaging.

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