LGA2W391MELB40

The LGA2W391MELB40 is a snap‑in, radial can aluminum electrolytic capacitor from Nichicon's LGA series. It delivers 390 µF of capacitance at a 450 V rating in a robust snap‑in package designed for general‑purpose power applications.

Engineered for high ripple current and long end‑of‑life performance, this capacitor withstands 5000 hours of rated ripple current at 105°C and is RoHS compliant, making it suitable for demanding high‑voltage power systems that require sustained performance at elevated temperatures.

Key Features

• Capacitance & Voltage — 390 µF nominal capacitance with a 450 V rated voltage for high‑voltage filtering and energy storage.
• High Ripple Current — Rated ripple current of 2.53 A at 120 Hz and 3.618 A at 50 kHz to support applications with significant AC ripple components.
• High Temperature Endurance — Designed for operation up to 105°C and specified to meet endurance requirements after 5000 hours of rated ripple/current exposure at 105°C.
• Low Equivalent Series Resistance (ESR) — ESR of 200 mΩ at 120 Hz for improved power dissipation and thermal stability under ripple load.
• Package & Mounting — Snap‑in, radial can package (package case: radial, can - snap‑in) for secure, through‑hole mounting in power assemblies; physical size approximately L: 4 × D: 3 cm.
• Polarized with Standard Tolerance — Polar capacitor with capacitance tolerance of ±20% (‑20% to +20%).
• Endurance Specifications — After 5000 hours at 105°C with DC bias plus rated ripple current, capacitance change is within ±20%, tan δ remains 200% or less of initial specified value, and leakage current remains less than or equal to the initial specified value.
• RoHS Compliance — Meets RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• Power supply bulk filtering — High capacitance and 450 V rating make this capacitor suitable for smoothing and energy storage in higher‑voltage power supplies.
• High‑ripple power circuits — Rated ripple current and low ESR support use where substantial AC ripple must be absorbed without accelerated degradation.
• Industrial power equipment — Long endurance at 105°C targets robust operation in industrial converters and power modules that operate at elevated temperatures.

Unique Advantages

• Designed for sustained high‑temperature operation — 105°C rating combined with a 5000‑hour endurance specification provides predictable long‑term behavior in hot environments.
• High ripple capability — Specified ripple current values at both low and high frequencies allow designers to size capacitors confidently for real‑world ripple profiles.
• Low ESR for thermal and electrical efficiency — 200 mΩ ESR at 120 Hz reduces internal heating and helps maintain performance under ripple load.
• Robust snap‑in mounting — Radial, snap‑in can package delivers secure mechanical and electrical connection for through‑hole power assemblies.
• Clear, testable endurance limits — Datasheet endurance criteria (capacitance, tan δ, leakage current) give measurable pass/fail bounds for design validation.
• Regulatory compliance — RoHS compliance supports use in products requiring restricted‑substance conformance.

Why Choose LGA2W391MELB40?

The LGA2W391MELB40 combines 390 µF at 450 V with high ripple current capability, low ESR, and a 105°C long‑life rating, positioning it for demanding general‑purpose power applications where both voltage withstand and sustained ripple handling are required. Its snap‑in radial can package simplifies PCB assembly for through‑hole power designs.

This capacitor is a practical choice for engineers specifying components for high‑voltage power supplies, industrial converters, and other systems that require predictable electrical and thermal performance over extended operating periods while remaining RoHS compliant.

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