LNU2W822MSEJ

The LNU2W822MSEJ is a screw-terminal aluminum electrolytic capacitor from Nichicon’s LNU series, delivering 8200 µF of capacitance at a 450 V rating. Designed for high-voltage industrial power electronics, it provides high-capacity bulk energy storage in a smaller package compared with earlier LNT series parts.

Targeted at inverter and regenerative circuits, this part is specified for continuous operation up to 105°C with a 5000-hour load life under rated ripple current, making it suitable for demanding power-supply and high-frequency charge–discharge applications.

Key Features

• Capacitance and Voltage: 8200 µF nominal capacitance with a rated voltage of 450 V; capacitance tolerance is ±20% (120 Hz, 20°C).
• High-temperature Endurance: Specified operating range –40°C to +105°C with a guaranteed load life of 5000 hours at 105°C under rated ripple conditions.
• High Ripple Handling: Rated ripple current of 24.7 A at 120 Hz and 34.58 A at 10 kHz for effective high-frequency smoothing and energy transfer.
• Screw Terminal Package: Radial can with screw terminals (M5 nominal bolt size in the series) for secure, low-impedance connections; brackets are supplied separately.
• High-frequency / Fast Charge–Discharge Performance: Engineered to cope with high-speed charge–discharge cycles and high-frequency regenerative voltages commonly found in inverter and servomotor systems.
• Series-level Voltage Range: While this part is rated at 450 V, the LNU series supports rated voltages in the range up to DC 525 V.
• RoHS Compliant: Conforms to RoHS directive (2011/65/EU, (EU)2015/863).
• Low-temperature Stability: Series specification notes an impedance ratio Z(–40°C)/Z(+20°C) up to 8, supporting performance in cold-start conditions.

Typical Applications

• Industrial Inverter Power Supplies: Bulk energy storage and smoothing for inverter DC links in industrial motor drives and power-conversion systems.
• AC Servomotor Regeneration: Handling high-frequency regenerative voltage in servomotor and motion-control systems where fast energy absorption and release are required.
• High-speed Charge–Discharge Circuits: Applications requiring repeated, rapid charge and discharge cycles—designed to maintain performance after extensive cycling.
• General Power Electronics: High-voltage DC-link and bulk-capacitance roles in high-frequency power converters and industrial power-supply designs.

Unique Advantages

• High-voltage capability: 450 V rating (series up to DC 525 V) provides the headroom required for many industrial power systems.
• Long-term thermal reliability: 5000 hours at 105°C under rated ripple current demonstrates proven endurance for continuous high-temperature operation.
• Robust ripple performance: Specified ripple currents at both 120 Hz and 10 kHz support a wide range of switching frequencies and smoothing needs.
• Compact high-voltage design: LNU series offers a smaller footprint compared with earlier high-voltage LNT parts, enabling tighter packaging in power assemblies.
• Secure mechanical and electrical connections: Screw-terminal radial can and M5-class termination provide durable, low-impedance mounting for industrial installations.
• Designed for repetitive cycling: Series endurance tests include charge–discharge cycling (50 million cycles at rated ΔV), validating performance in dynamic applications.

Why Choose LNU2W822MSEJ?

The LNU2W822MSEJ balances large bulk capacitance with high-voltage rating and long-term thermal endurance, making it well suited to industrial power-electronics designs that demand reliable DC-link storage and high-frequency regenerative handling. Its screw-terminal radial can construction and specified ripple capability simplify integration into inverter, servo, and other high-power assemblies.

Engineered as part of Nichicon’s LNU series, this capacitor is a practical choice for designers seeking robust long-life components for industrial converters and regenerative systems, offering verifiable specifications for capacitance, ripple, temperature, and endurance.

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