LGL2W681MELC45

The LGL2W681MELC45 is a snap‑in terminal aluminum electrolytic capacitor from Nichicon’s LGL series, specified at 680 µF and 450 V with a 105°C operating temperature rating. It is designed for general‑purpose power applications that require high voltage handling, elevated temperature endurance and secure snap‑in mounting in radial can packages (∅35 × 45 mm).

Key design attributes include a high working voltage, a long endurance rating at elevated temperature, and specified ripple current performance across frequency — making it suitable where reliable bulk energy storage and filtering are required in high‑voltage assemblies.

Key Features

• High voltage and capacitance: 680 µF nominal capacitance at a 450 V rated voltage for bulk energy storage and filtering in high‑voltage circuits.
• 105°C temperature rating & endurance: Operates from –25°C to +105°C with a specified lifetime of 2000 hours at 105°C under D.C. bias plus rated ripple current.
• Snap‑in radial can package: Snap‑in terminal type in a radial can (∅35 × 45 mm / L: 45 × D: 35 mm) for secure board mounting and easy insertion into power assemblies.
• Ripple current performance: Rated ripple current of 1.77 A at 120 Hz and 2.531 A at 50 kHz, with frequency coefficients published for higher‑frequency operation.
• Electrical stability and loss: Capacitance tolerance ±20% (120 Hz, 20°C) and tan δ specified (max. 0.20 at 450 V, 120 Hz) to characterize dissipation.
• Leakage and reliability characteristics: Leakage current specification (I ≤ 3√(μA) after 5 minutes at 20°C) and shelf life/endurance criteria that define post‑test limits for capacitance, tan δ and leakage.

Typical Applications

• General‑purpose power electronics: Bulk energy storage and smoothing in high‑voltage power supplies and converters where 450 V rating and high temperature endurance are required.
• Industrial power modules: Filtering and decoupling in industrial power assemblies that operate at elevated temperatures up to 105°C.
• High‑voltage DC link circuits: Energy buffering and ripple attenuation in DC link stages that benefit from the 680 µF / 450 V combination.

Unique Advantages

• High working voltage capability: 450 V rating enables use in higher‑voltage power systems without parallel stacking of lower‑voltage parts.
• Elevated temperature endurance: 2000 hours specified at 105°C under rated stress provides measurable long‑term performance data for thermal design and reliability planning.
• Snap‑in termination: Robust snap‑in mounting helps ensure mechanical stability and simplifies placement in power assemblies compared with loose lead types.
• Frequency‑aware ripple handling: Published ripple current values at 120 Hz and 50 kHz and frequency coefficients allow designers to size capacitors based on actual ripple spectra.
• Defined electrical limits: Specified leakage current formula and tan δ limits provide predictable behavior for leakage and dissipation budgeting in designs.

Why Choose LGL2W681MELC45?

The LGL2W681MELC45 positions itself as a reliable, high‑voltage electrolytic capacitor choice for engineers designing general‑purpose power systems that require 680 µF at 450 V and sustained performance up to 105°C. Its 2000‑hour endurance rating, defined leakage and dissipation characteristics, and snap‑in radial can package make it suitable for high‑temperature, high‑voltage energy storage and filtering tasks.

Manufactured by Nichicon, this part provides clear, testable specifications (capacitance tolerance, ripple current, tan δ, leakage and endurance) that help teams evaluate long‑term behavior and integrate the capacitor into power designs with confidence.

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