LNU2H681MSEF

The LNU2H681MSEF is a screw-terminal aluminum electrolytic capacitor designed for high-voltage industrial power applications. It delivers 680 µF at a 500 V rating in a compact screw-terminal can, optimized for inverter circuitry and high-frequency regenerative environments.

Built for sustained operation up to 105°C with a rated life of 5000 hours, this capacitor combines high ripple handling and robust leakage/tanδ characteristics for reliable performance in power conversion and motor-drive systems.

Key Features

• Electrical Performance — 680 µF capacitance at 500 V DC with ±20% tolerance (120 Hz, 20°C); tanδ 0.2 (DF) at 20°C and 120 Hz for defined loss behavior.
• High Ripple Current Capability — Rated ripple current of 4.0 A at 120 Hz (low frequency) and 5.6 A at 100 kHz (high frequency) to support high-speed charge/discharge and switching applications.
• Leakage and Endurance — Specified leakage current 1740 µA and a load life of 5000 hours at 105°C under rated ripple conditions to meet long-duration industrial duty cycles.
• Thermal Range & Reliability — Operating temperature range −40°C to +105°C with endurance and shelf-life performance defined in the LNU series specifications.
• Mechanical & Mounting — Screw terminal radial can package (φ51 × 75 mm length) with M5 terminal provisions for secure, high-current connections; brackets supplied separately as noted in series documentation.
• Compliance — RoHS compliant per the product documentation for environmentally regulated designs.

Typical Applications

• Industrial Power Supplies — Used as DC bus and smoothing capacitors in inverter power supplies where 500 V DC capability and high ripple endurance are required.
• AC Servomotor Regeneration — Suited to handle high-frequency regenerative voltages in motor-drive regenerative circuits.
• General Inverter Systems — Provides energy storage and stable DC link performance in general inverter topologies.
• High-Speed Charge/Discharge Circuits — Supports applications that demand repeated rapid charge-discharge cycles with defined endurance characteristics.

Unique Advantages

• High-Voltage Capability: 500 V rating enables use in higher-voltage DC link and inverter applications without series stacking.
• Strong Ripple Handling: Dual-rated ripple current (4.0 A at 120 Hz and 5.6 A at 100 kHz) supports both low- and high-frequency switching environments.
• Long-Term Reliability: 5000 hours life at 105°C under rated ripple current provides predictable aging and maintenance planning for industrial systems.
• Screw-Terminal Connectivity: Robust screw terminals with M5 nominal bolt diameter allow secure high-current connections and straightforward installation.
• Compact High-Voltage Form Factor: Designed as a high-voltage, smaller-sized option within the LNU series for space-constrained power assemblies.
• Regulatory Compliance: RoHS compliance supports use in regulated product designs.

Why Choose LNU2H681MSEF?

The LNU2H681MSEF positions itself as a durable, high-voltage electrolytic solution for industrial power electronics where robust ripple handling and extended high-temperature life are required. Its screw-terminal package and compact diameter make it suitable for DC link, inverter, and regenerative applications that demand reliable energy storage under repeated switching stress.

Produced as part of Nichicon’s LNU series and available in mass production, this capacitor is aimed at engineers and procurement teams designing industrial motor drives, inverter power supplies, and other high-voltage power conversion systems that require predictable long-term performance.

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