LGX2G681MELC45

The LGX2G681MELC45 is a snap-in terminal aluminum electrolytic capacitor from Nichicon's LGX series designed for general-purpose power applications. It combines a 680 µF capacitance with a 400 V rated voltage in a smaller-sized radial can and snap-in package for straightforward panel or board mounting.

Engineered for elevated operating temperatures, this capacitor supports continuous operation up to 105°C with a specified 5000-hour endurance at that temperature, making it suitable for rectifier circuits in inverters and switching power supplies where long-term stability and ripple handling are required.

Key Features

• Capacitance & Voltage — 680 µF nominal capacitance with a 400 V rated voltage and ±20% tolerance at 120 Hz, 20°C.
• High-Temperature Long Life — Endurance specified as 5000 hours at 105°C under rated ripple/voltage conditions; capacitance change stays within ±20% after endurance testing.
• Snap-In Radial Package — Radial, can-type snap-in package for secure mounting and easy installation; physical size L: 4.5 × D: 3.5 cm supports compact power assemblies.
• Ripple Current Capability — Rated ripple current of 2.12 A at 120 Hz and 3.032 A at 50 kHz to support rectification and smoothing in power circuits.
• Leakage Current Specification — Leakage current meets I ≤ 3√(C·V) µA after 5 minutes’ application of rated voltage at 20°C.
• Low-Temperature Stability — Impedance stability down to −25°C with an impedance ratio (Z(−25°C)/Z(+20°C)) appropriate for 400 V-rated parts.
• Polarized Design — Polarized electrolytic construction for DC filtering, energy storage, and smoothing in power supply rails.
• Regulatory Compliance — RoHS compliant.

Typical Applications

• Inverter Rectifier Circuits — Used for smoothing and energy storage on rectifier outputs in inverter systems requiring high-voltage DC filtering.
• Switching Power Supplies — Provides bulk capacitance and ripple handling for AC-to-DC and DC-to-DC switching supplies.
• General-Purpose Power Filtering — Suitable for general-purpose smoothing, decoupling, and energy buffering in industrial and commercial power electronics.

Unique Advantages

• Long-Life Endurance: 5000 hours at 105°C gives designers a predictable lifecycle for high-temperature power environments.
• High-Voltage Capability: 400 V rating enables use in higher-voltage DC bus and rectifier applications without derating.
• Compact Snap-In Form Factor: Smaller-sized radial can with snap-in terminals simplifies assembly while conserving board and enclosure space.
• Measurable Ripple Performance: Specified ripple currents at both low (120 Hz) and higher (50 kHz) frequencies support a range of power-conversion topologies.
• Defined Electrical Limits: Clear leakage current and tan δ specifications provide predictable behavior for circuit qualification and margining.
• RoHS Compliant: Meets RoHS directive requirements for environmental compliance in modern electronic designs.

Why Choose LGX2G681MELC45?

The LGX2G681MELC45 delivers a balanced combination of high-voltage capability, substantial capacitance, and long-term thermal endurance in a compact snap-in aluminum electrolytic package. Its defined endurance (5000 hours at 105°C), leakage and tan δ limits, and ripple-current ratings make it a practical choice for engineers designing rectifier circuits, switching power supplies, and other general-purpose power systems that require robust, predictable electrolytic performance.

This part is well suited for designs that prioritize long-term stability under elevated temperatures and require a straightforward snap-in mounting solution for efficient assembly and serviceability.

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