LNU2H681MTEF

The LNU2H681MTEF is a screw-terminal, high-voltage aluminum electrolytic capacitor designed for industrial power applications. It provides 680 μF capacitance with a 500 V rated voltage and is built for demanding inverter and motor-drive circuits that require high-voltage energy storage and frequent charge–discharge cycles.

Engineered for a –40 °C to 105 °C operating range and a rated load life of 5000 hours at 105 °C under ripple current, this stud-bolt mount capacitor targets industrial power supplies, regenerative circuits for AC servomotors and general inverter applications where compact high-voltage capacitors are required.

Key Features

• Capacitance & Voltage — 680 μF nominal capacitance with a 500 V rated voltage (series rated up to DC525 V), suitable for high-voltage energy storage in inverter systems.
• High-temperature endurance — Rated for operation up to 105 °C with a specified load life of 5000 hours at 105 °C when rated ripple current is applied.
• Ripple current capability — Handles 4 A at 120 Hz and 5.6 A at 10 kHz, supporting both low- and high-frequency ripple environments.
• Mechanical mounting — Stud bolt (radial can with screw terminals) package for secure installation in power assemblies.
• Wide operating range — Operates from –40 °C to 105 °C for use across varied industrial environments.
• Leakage and insulation characteristics — Leakage current limited to 3√(C·V) μA or 5 mA (whichever is smaller) after 5 minutes at 20 °C; insulation resistance >100 MΩ at DC 500 V between terminal and bracket.
• Robust voltage withstand — No abnormality under AC 2500 V for 1 minute between terminal and bracket, per series specifications.
• RoHS compliant — Conforms to applicable RoHS directives.

Typical Applications

• Industrial inverters — Energy storage and smoothing in inverter power supplies where high-voltage, compact capacitors are required.
• Motor drive regenerative circuits — Handling high-frequency regenerative voltages for AC servomotors and motor-control systems.
• High-speed charge–discharge systems — Suited for circuits exposed to rapid charge–discharge loading in industrial power electronics.
• Capacitor banks in power electronics — Use in high-voltage capacitor stacks or assemblies requiring screw-terminal mounting and reliable endurance at elevated temperatures.

Unique Advantages

• High-voltage capability: 500 V rated capacitance (part) with series rated up to DC525 V, enabling use in higher-voltage power stages.
• Designed for long-term thermal stress: 5000-hour load life at 105 °C under rated ripple conditions provides predictable performance in hot operating environments.
• Frequency-flexible ripple handling: Specified ripple current at both 120 Hz (4 A) and 10 kHz (5.6 A) supports diverse switching and regenerative workloads.
• Stud-bolt mounting for secure installation: Screw-terminal radial can with M5 bolt options facilitates robust mechanical and electrical connections in power enclosures.
• Compact, high-voltage form factor: LNU series offers a smaller size compared to the LNT series while maintaining high-voltage capability, useful where board or chassis space is limited.
• Verified electrical safety margins: Insulation resistance and AC voltage proof ratings provide measurable isolation between terminal and bracket for safer high-voltage assemblies.

Why Choose LNU2H681MTEF?

LNU2H681MTEF combines high-voltage electrical performance, thermal endurance and stud-bolt mounting to meet the needs of industrial inverter and motor-drive designs. Its 500 V rating, 680 μF capacitance and specified ripple capabilities make it a practical choice where compact high-voltage capacitors must endure frequent charge–discharge cycles and elevated temperatures.

This part is suitable for engineers specifying capacitors for regenerative circuits, inverter DC buses and power-conditioning modules that require predictable life and measurable leakage/insulation characteristics. Its RoHS compliance and series-level specifications provide clear, verifiable parameters for design and procurement decisions.

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