LNU2W392MSEG

The LNU2W392MSEG is a screw-terminal aluminum electrolytic capacitor designed for high-voltage industrial power applications. It combines 3.9 mF capacitance with a 450 V rating and a compact screw-terminal can package for use in inverter circuitry, regenerative circuits, and other power electronics.

Built for elevated operating conditions, this LNU-series part supports operation from –40 °C to +105 °C, long load life under ripple current, and high-frequency charge–discharge loading typical of servo and inverter systems.

Key Features

• Capacitance & Voltage — 3.9 mF nominal capacitance with a rated voltage of 450 V (part-specific). The LNU series supports rated voltages up to DC525 V.
• High Temperature Endurance — Designed for operation from –40 °C to +105 °C with a load life of 5000 hours at 105 °C under applied rated ripple current.
• High Ripple & Frequency Performance — Ripple current ratings of 16.3 A at 120 Hz and 22.82 A at 10 kHz, suitable for high-frequency regenerative and inverter environments.
• Screw Terminal Mounting — Radial can with screw terminals provides secure electrical connection and simplified installation for power modules and busbar systems.
• Robust Electrical Reliability — Leakage current specified as not more than 3√(C·V) µA or 5 mA (after 5 minutes at 20 °C). Insulation resistance >100 MΩ at DC 500 V between terminal and bracket; voltage proof AC 2500 V for 1 minute.
• Mechanical Footprint — Compact high-voltage can: dimensions L: 13.5 cm × D: 6.35 cm; maximum seated height 5.315 inch, offering a smaller-sized option within the LNU family compared with LNT.
• Charge–Discharge Endurance — Designed to tolerate high-speed charge–discharge loading and specified to meet endurance requirements after 50 million charge–discharge cycles (ΔV = rated voltage ±0.3, 3 Hz).
• RoHS Compliance — Compliant with the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• Industrial Inverters — Bulk and smoothing capacitance in inverter power supplies for motor drives and factory automation, where high voltage and high-temperature endurance are required.
• AC Servomotor Regenerative Circuits — Energy absorption and regenerative voltage buffering for servo systems that experience high-frequency charge–discharge cycles.
• Power Supply Filtering — DC link and filtering in industrial power modules handling substantial ripple currents at both low and high frequencies.
• High-Speed Charge–Discharge Systems — Applications that demand fast charge acceptance and discharge robustness, such as braking resistors and energy-recovery circuits.

Unique Advantages

• High-voltage capability: Part-rated at 450 V with the LNU series supporting up to DC525 V, enabling use in higher-voltage power electronics designs.
• High ripple handling: Specified ripple current of 16.3 A (120 Hz) and 22.82 A (10 kHz) reduces thermal stress and supports high-frequency operation.
• Long life at elevated temperature: 5000 hours of rated-load life at 105 °C ensures reliability in demanding industrial environments.
• Durable screw-terminal packaging: Radial can with screw terminals simplifies installation and provides secure connections for busbars and power wiring.
• Proven electrical robustness: Tight leakage-current limits, high insulation resistance, and AC voltage-proof testing provide predictable behavior under stress conditions.
• Compact high-voltage form factor: Smaller-sized than comparable LNT series parts, enabling denser power module designs where board or chassis space is constrained.

Why Choose LNU2W392MSEG?

LNU2W392MSEG delivers a combination of high capacitance, elevated voltage rating, and thermal endurance tailored for industrial power electronics. Its screw-terminal package and high ripple-current capability make it suitable for inverter DC links, regenerative circuits, and other heavy-duty power applications that require reliable energy buffering under repeated charge–discharge conditions.

This part is well suited to engineers and procurement teams specifying components for robust, long-life industrial systems where RoHS compliance and proven electrical performance are required.

Request a quote or contact sales to discuss availability, lead times, and pricing for LNU2W392MSEG.