LNUN7182MTEG

The LNUN7182MTEG from Nichicon is a screw-terminal aluminum electrolytic capacitor in the LNU series, offering 1.8 mF capacitance at a rated DC voltage of 525 V. Designed for industrial power electronics, it targets inverter circuitry and high-frequency regenerative voltage applications such as AC servomotor systems.

This capacitor combines high-voltage capability with a compact footprint in a radial can with screw terminals, and is specified for continuous operation from −40 °C to 105 °C with a rated load life of 5000 hours at 105 °C under applied ripple current.

Key Features

• Capacitance and Voltage — 1.8 mF rated capacitance with a DC rated voltage of 525 V, suitable for high-voltage DC link and energy-storage segments of power converters.
• Temperature Range — Specified operating temperature range from −40 °C to 105 °C, enabling use across typical industrial ambient conditions.
• High-Temperature Endurance — Load life of 5000 hours at 105 °C with application of ripple current; endurance requirements specified in the datasheet assure performance after extended high-temperature use.
• Ripple Current Performance — Handles 8 A at 120 Hz (low frequency) and 11.2 A at 10 kHz (high frequency), supporting both mains-frequency and high-frequency inverter ripple conditions.
• Robust Package and Mounting — Radial can with screw terminals and stud bolt mounting for secure electrical and mechanical connections in industrial assemblies.
• Polarized with Standard Tolerance — Polarized device with capacitance tolerance of −20% to +20% (±20%), measured at 120 Hz, 20 °C.
• Compact High-Voltage Design — LNU series noted as high-voltage and smaller sized than LNT, offering a higher voltage rating without excessive enclosure size.
• RoHS Compliant — Conforms to the RoHS directive (2011/65/EU, (EU)2015/863).
• Physical Dimensions — Length 10.5 cm × Diameter 6.35 cm with a maximum seated height of 4.134 inches, enabling straightforward integration into power assemblies that accept radial can capacitors.

Typical Applications

• Industrial Inverters — DC link and smoothing capacitor for inverter circuitry where high voltage and ripple endurance are required.
• AC Servomotor Regeneration — Energy-buffering and regenerative voltage handling in servomotor drive systems operating with high-frequency charge-discharge cycles.
• Power Supply Filtering — Filter and bulk storage in industrial power supplies exposed to continuous ripple current at elevated temperatures.
• High-Speed Charge–Discharge Circuits — Applications requiring repeated rapid charge–discharge cycles, supported by the series' specified endurance for 50 million charge–discharge events (per datasheet conditions).

Unique Advantages

• High-Voltage Capability: 525 V rated voltage enables use in elevated-voltage DC link and energy-storage roles common in industrial power systems.
• Designed for High-Temperature Duty: 5000-hour load life at 105 °C demonstrates suitability for sustained operation in hot operating environments.
• Strong Ripple Handling: Specified ripple currents of 8 A at 120 Hz and 11.2 A at 10 kHz support both low- and high-frequency power stages.
• Secure Mechanical Termination: Screw terminals with stud bolt mounting provide durable electrical connection and mechanical stability in vibration-prone environments.
• Compact High-Voltage Design: Part of the LNU series noted for higher voltage in a smaller size compared with the LNT series, helping save board and chassis space.
• Regulatory Compliance: RoHS-compliant construction supports regulatory requirements for industrial equipment deployments.

Why Choose LNUN7182MTEG?

LNUN7182MTEG positions itself as a reliable, high-voltage aluminum electrolytic option for industrial power designs that require robust ripple handling, sustained high-temperature operation, and secure screw-terminal mounting. Its 525 V rating, 1.8 mF capacitance, and endurance specification make it suitable for DC link filtering, inverter support, and regenerative circuits in industrial drives.

Engineers specifying for long-life, high-ripple applications will find the LNUN7182MTEG appropriate for power supplies and motor-drive systems that must withstand elevated temperatures and repeated charge–discharge cycles while remaining RoHS compliant.

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