LGW2W391MELB50

The LGW2W391MELB50 is a snap-in terminal aluminum electrolytic capacitor offering 390 µF capacitance at a 450 V rating in a 30 mm × 50 mm can. It is designed for general-purpose applications that require high-voltage bulk capacitance with high ripple current capability and long endurance under elevated temperature and ripple conditions.

Key distinguishing characteristics include snap-in mounting for robust PCB retention, rated operation to 105°C, and endurance verified to 3000 hours under the rated ripple-current condition. The device is RoHS compliant.

Key Features

• Rated capacitance and voltage: 390 µF at 450 V provides substantial bulk energy storage for high-voltage circuits.
• Snap-in terminal package: Radial, can-type snap-in mounting for secure, board-level retention and straightforward assembly.
• High ripple-current capability: Specified ripple current of 2.4 A at 120 Hz and 3.432 A at 50 kHz supports demanding AC ripple conditions.
• High-temperature endurance: Designed to withstand 3000 hours application of rated ripple current at 105°C, with post-test limits of ±20% capacitance change, tan δ ≤ 200% of initial, and leakage current ≤ initial specified value.
• Operating temperature range: −25 °C to +105 °C for the 400–450 V variants of the series.
• Leakage current specification: Series leakage current formula I ≤ 3√CV (µA) after 5 minutes at 20 °C, permitting predictable leakage behavior.
• Tangent of loss angle (tan δ): Series specification shows tan δ max of 0.20 at the 450 V rating (measured at 120 Hz, 20 °C).
• Environmental compliance: Compliant with RoHS directives (2011/65/EU, (EU)2015/863).

Typical Applications

• General-purpose high-voltage filtering: Bulk smoothing and decoupling in circuits that require 390 µF at 450 V with robust ripple handling.
• Power electronics energy storage: Local energy reservoir and ripple mitigation where high-voltage capacitance and long endurance at 105 °C are required.
• Industrial power supplies: High-voltage filtering and ripple suppression in industrial equipment with elevated operating temperatures.

Unique Advantages

• High-voltage bulk capacity: 390 µF at 450 V provides significant stored energy per component, reducing the number of parallel capacitors needed.
• Proven ripple endurance: Rated to withstand 3000 hours of rated ripple current at 105 °C, translating to predictable life under heavy ripple-loading conditions.
• Clear ripple specifications: Published ripple current values at 120 Hz and 50 kHz (2.4 A and 3.432 A respectively) allow accurate thermal and reliability planning.
• Secure snap-in mounting: Radial snap-in package simplifies assembly and ensures reliable mechanical retention on the PCB.
• Predictable leakage and dissipation: Leakage current defined by I ≤ 3√CV and tan δ limits for 450 V (max 0.20) support robust design margins and loss calculations.
• RoHS compliance: Meets RoHS requirements for easier regulatory conformity in global deployments.

Why Choose LGW2W391MELB50?

LGW2W391MELB50 combines high-voltage capacitance, defined ripple-current capability, and extended high-temperature endurance in a snap-in can package. These characteristics make it well suited for designs that require reliable bulk energy storage and ripple handling under elevated temperatures.

This capacitor is appropriate for engineers specifying components for general-purpose high-voltage filtering and energy-storage roles where measurable ripple limits, leakage behavior, and long-term endurance data are required to validate thermal and lifetime models.

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