LNU2H332MSEG

The LNU2H332MSEG is a screw-terminal aluminum electrolytic capacitor in Nichicon's LNU series, offering 3.3 mF of capacitance at a 500 V rating. It is a high-voltage, smaller-sized design intended for industrial power electronics where compact bulk capacitance and robust high-voltage performance are required.

Typical use cases include industrial power supplies, inverter circuitry and high-frequency regenerative voltage applications such as AC servomotor drives. The device emphasizes high ripple handling, endurance at elevated temperature, and secure screw-terminal connections for reliable field installation.

Key Features

• Electrical performance — 3.3 mF capacitance with ±20% tolerance; nominal rated voltage 500 V (part) and rated voltage range up to DC 525 V (LNU series specification).
• High ripple capability — Rated ripple current 10.9 A at 120 Hz and 15.26 A at 10 kHz, enabling handling of substantial AC ripple and high-frequency currents.
• Thermal and endurance — Operates from −40 °C to +105 °C; load life of 5000 hours at 105 °C with DC bias plus rated ripple current applied, meeting specified limits for capacitance change, tan δ and leakage current after endurance.
• Charge–discharge robustness — Designed to cope with high-speed charge–discharge loading and proven endurance after 50 million charge–discharge cycles (ΔV = rated voltage − 0.3 V, 3 Hz) per series specifications.
• Leakage and insulation — Leakage current specified as not more than 3√(C·V) μA or 5 mA (whichever is smaller) after 5 minutes at rated voltage; insulation resistance >100 MΩ at DC 500 V between terminal and bracket.
• Electrical safety margin — Withstands AC 2500 V for 1 minute between terminal and bracket with no abnormality as specified for the series.
• Mechanical and mounting — Screw-terminal, radial can construction for secure, low-impedance connections; dimensions (L × D) listed as 16.5 × 6.35 cm and sleeve marking printed white on black for easy identification.
• RoHS compliance — Compliant to the RoHS directive (2011/65/EU,(EU)2015/863).

Typical Applications

• Industrial power supplies — Bulk energy storage and smoothing in inverter front-ends and high-voltage industrial supplies where compact high-voltage capacitance is needed.
• Motor drive regenerative circuits — Handling high-frequency regenerative voltages for AC servomotor drives and regenerative braking systems.
• General inverter systems — DC-link and filtering for inverters used in industrial and automation equipment.
• High-speed charge–discharge systems — Circuits requiring frequent or rapid charge–discharge cycles, benefiting from the series' specified charge–discharge endurance.

Unique Advantages

• High-voltage bulk capacitance: 3.3 mF at 500 V provides substantial energy storage for DC-link and filtering in high-voltage systems.
• Compact high-voltage form factor: LNU series offers smaller-sized high-voltage capacitors compared with the previous LNT family, enabling denser power electronics layouts.
• High ripple and frequency handling: Rated ripple currents at 120 Hz and 10 kHz support both low- and high-frequency ripple demands common in inverter and regenerative circuits.
• Long high-temperature life: 5000-hour load-life at 105 °C under rated ripple current provides extended operational robustness in hot industrial environments.
• Secure screw-terminal mounting: Screw terminals give reliable, low-resistance connections for high-current and field-serviceable installations.
• Specified leakage and insulation characteristics: Clear leakage current limits and insulation resistance/voltage-proof specifications simplify design verification and safety planning.

Why Choose LNU2H332MSEG?

LNU2H332MSEG is positioned for engineers designing industrial power electronics who need a compact, high-voltage capacitor with strong ripple current capability and proven endurance at elevated temperatures. Its screw-terminal radial can construction and explicit insulation and leakage specifications make it straightforward to integrate into DC-link, inverter and regenerative-power designs.

As part of Nichicon’s LNU series, this capacitor combines high-voltage ratings (up to DC525 V across the series), long life at 105 °C, and charge–discharge resilience—delivering a balance of performance and reliability for demanding industrial applications while meeting RoHS requirements.

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