LNU2G392MSEG

The LNU2G392MSEG is an aluminum electrolytic capacitor in Nichicon's LNU series, designed as a screw-terminal, high-voltage solution for industrial power electronics. It provides 3.9 mF capacitance at a 400 V DC rating and is optimized for inverter and regenerative power circuits where compact size, high ripple handling and high-temperature endurance are required.

Rated for operation from −40°C to +105°C and designed for a 5,000-hour load life at 105°C under rated ripple conditions, this part targets industrial power supplies, AC servomotor inverter systems and high-frequency regenerative applications.

Key Features

• Capacitance & Voltage — 3.9 mF capacitance with a rated voltage of 400 V DC; capacitance tolerance is −20% to +20% (120 Hz, 20°C).
• High-temperature operation — Rated for −40°C to +105°C continuous operation and specified for 5,000 hours of endurance at 105°C under rated ripple current.
• High ripple-current capability — Specified ripple current of 14.6 A at 120 Hz and 20.44 A at 10 kHz, supporting demanding AC and inverter currents.
• Screw-terminal package — Radial can with screw terminals for robust mechanical and electrical connections suited to industrial assemblies.
• Charge–discharge endurance — Endurance validated for extensive charge–discharge cycling (50 million cycles under specified test conditions in the series datasheet).
• RoHS compliant — Conforms to the RoHS directive (2011/65/EU, (EU)2015/863).
• Compact form factor — Smaller-sized design within the LNU series, with physical dimensions of L: 10 × D: 6.35 cm for space-constrained power assemblies.

Typical Applications

• Industrial power supplies — Bulk and smoothing capacitance for inverter front-ends and high-voltage DC bus filtering in industrial converters.
• AC servomotor inverters — Energy buffering and regenerative voltage handling in motor drive systems that require high-frequency charge/discharge performance.
• General inverters and drives — High-voltage filtering and ripple suppression for variable-frequency drives and regenerative power stages.
• High-frequency regenerative circuits — Supports regenerative energy flows and rapid charge/discharge cycles in power conversion topologies.

Unique Advantages

• High-temperature endurance: Specified 5,000 hours at 105°C under rated ripple, enabling long-term reliability in elevated operating temperatures.
• High-voltage capability in a compact package: 400 V rating (series rated up to 525 V) combined with a smaller size than comparable LNT parts helps reduce the capacitor footprint on power boards.
• Robust ripple handling: High ripple current ratings at both low and high frequencies (14.6 A at 120 Hz, 20.44 A at 10 kHz) support demanding inverter and regenerative loads.
• Durable mechanical connection: Screw-terminal radial can package offers reliable mounting and electrical contact suitable for industrial environments.
• Charge–discharge resilience: Series-level validation for 50 million charge–discharge cycles under specified conditions supports designs with frequent energy cycling.
• Regulatory compliance: RoHS compliance ensures suitability for regulated markets and simplifies environmental qualification.

Why Choose LNU2G392MSEG?

The LNU2G392MSEG delivers a balance of high-voltage capability, elevated temperature endurance and high ripple-current performance in a compact screw-terminal aluminum electrolytic capacitor. It is well suited to engineers designing industrial inverters, motor drives and regenerative power stages that demand reliable bulk capacitance with proven life and cycle endurance.

Choosing this part provides a component-level solution focused on long-term thermal stability, robust ripple handling and mechanical reliability—attributes that simplify system-level thermal management and help maintain performance over extended service life.

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