LGNW6681MELC50

The LGNW6681MELC50 is a snap‑in terminal aluminum electrolytic capacitor from Nichicon's LGN series, specified for 680 µF at 420 V with polarized construction. It is a smaller‑sized, snap‑in radial can designed for general‑purpose applications that require high ripple endurance at elevated temperatures.

Key value propositions include a 105°C rated operating temperature with 3000 hours endurance under rated ripple conditions, one rank smaller case sizing than the LGU series, and RoHS compliance for environmental compatibility.

Key Features

• Capacitance & Voltage — 680 µF nominal capacitance at a rated voltage of 420 V with tolerance ±20% (at 120 Hz, 20°C).
• High‑temperature Endurance — Rated for operation up to 105°C and specified to withstand 3000 hours of DC bias plus rated ripple current at 105°C.
• Ripple Current Capability — Rated ripple current of 2.2 A at 120 Hz and 3.146 A at 100 kHz, supporting sustained ripple handling in demanding conditions.
• Electrical Loss & Stability — Tangent of loss angle (tan δ) maximum 0.15 for rated voltages 160–420 V (measured at 120 Hz, 20°C); low‑temperature impedance behavior defined in the datasheet.
• Leakage Current — Leakage current per datasheet: I ≤ 3/√(μA) after 5 minutes’ application of rated voltage at 20°C.
• Package & Mounting — Snap‑in terminal, radial can package. Size dimension: L: 5 × D: 3.5 cm; Polarized mounting for board installation.
• Operating Range — Rated category temperature range applicable for 350–600 V products is –25°C to +105°C, consistent with this part’s 420 V rating.
• RoHS Compliant — Conforms to the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• General‑purpose power filtering — Bulk smoothing and decoupling where 680 µF at 420 V and sustained ripple handling are required.
• Industrial power equipment — Use in equipment that requires components rated for 105°C and extended ripple endurance (3000 hours at 105°C).
• High‑voltage DC circuits — Applications needing a polarized, high‑voltage electrolytic capacitor in a compact snap‑in can package.

Unique Advantages

• Extended high‑temperature life: Specified 3000 hours at 105°C under rated ripple current, providing predictable endurance in hot environments.
• Compact snap‑in package: One rank smaller case than LGU series, enabling space savings while retaining snap‑in mounting convenience.
• Measured ripple performance: Explicit ripple current ratings at 120 Hz and 100 kHz support designers targeting both low‑ and high‑frequency ripple conditions.
• Clear electrical limits: Tangent of loss angle and leakage current specifications are provided for straightforward electrical selection and verification.
• Regulatory compatibility: RoHS compliance supports use in assemblies that require restricted‑substances conformance.

Why Choose LGNW6681MELC50?

The LGNW6681MELC50 positions itself as a reliable, compact snap‑in electrolytic solution for designers who need 680 µF at 420 V with verified long‑term ripple endurance at elevated temperatures. Its combination of a smaller case size relative to LGU, explicit ripple and loss specifications, and RoHS compliance makes it suitable for general‑purpose power applications where space, thermal endurance, and predictable performance matter.

This part is well suited for engineers and buyers specifying capacitors for high‑temperature power electronics, industrial equipment, and high‑voltage DC circuits that require documented endurance and electrical characteristics.

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