LNUN7182MSEG

The LNUN7182MSEG is a screw‑terminal aluminum electrolytic capacitor from Nichicon's LNU series, rated 1800 µF at DC 525 V and specified for operation up to 105°C. It is designed for high‑voltage power applications where a compact, high‑energy smoothing or regenerative capacitor is required.

Typical use cases include industrial inverter and power‑supply environments such as AC servomotor regenerative circuits and general inverter systems. The part offers high ripple tolerance, long operational life at elevated temperature, and a screw‑terminal package for robust electrical connections.

Key Features

• Capacitance & Voltage — 1.8 mF (1800 µF) rated at DC 525 V for high‑voltage energy storage and smoothing.
• High‑Temperature Endurance — Specified for operation from −40°C to +105°C with a rated load life of 5000 hours at 105°C when subjected to rated ripple current under DC bias.
• Robust Ripple Performance — Ripple current capability of 8 A at 120 Hz and 11.2 A at 10 kHz, supporting high‑frequency and high‑current ripple environments.
• Screw‑Terminal Package — Radial can with screw terminals for secure, low‑impedance connections suitable for industrial power wiring.
• Polarized Electrolytic — Polarized device with ±20% capacitance tolerance (measured at 120 Hz, 20°C).
• Compact Physical Size — Smaller sized variant within the series, dimensioned L: 10.5 × D: 6.35 cm to assist compact power module designs.
• Leakage & Insulation Characteristics — Leakage current after 5 minutes is specified as not more than 3√(C·V) µA or 5 mA (whichever is smaller); insulation resistance exceeds 100 MΩ at DC 500 V between terminal and bracket.
• Voltage Withstand — Verified to show no abnormality under AC 2500 V for 1 minute between terminal and bracket.
• Charge–Discharge Endurance — Series‑level qualification includes endurance for long charge–discharge cycling (specified for 50 million cycles at 3 Hz in datasheet conditions).
• RoHS Compliant — Meets RoHS directive (2011/65/EU and (EU)2015/863).

Typical Applications

• Industrial Inverter Circuits — Bulk smoothing and energy buffering in inverter power supplies where high DC bus voltages and robust ripple handling are required.
• Regenerative Drives — Handling high‑frequency regenerative voltages in AC servomotor systems to stabilize DC link voltage during braking and regeneration events.
• High‑Voltage Power Conversion — DC link and energy storage in general inverter and high‑voltage power conversion modules.

Unique Advantages

• High Voltage Rating: 525 V DC enables use in higher‑voltage DC link and inverter systems without series stacking.
• Long High‑Temperature Life: 5000 hours at 105°C under rated ripple current provides predictable lifetime in demanding thermal environments.
• High Ripple Current Capability: Rated ripple currents at both low and high frequencies support applications with wide ripple spectra and fast charge–discharge demands.
• Secure Screw‑Terminal Connectivity: Screw terminals deliver robust mechanical and electrical connections for industrial wiring and high‑current bus implementations.
• Compact Footprint: Smaller sized option within the series helps reduce board and module volume while maintaining high voltage and energy density.
• Tested Insulation & Voltage Proof: Insulation resistance >100 MΩ and AC 2500 V dielectric proof provide confidence in isolation and reliability between terminal and bracket.

Why Choose LNUN7182MSEG?

LNUN7182MSEG targets high‑voltage industrial power designs that need a compact, durable electrolytic capacitor with proven high‑frequency ripple handling and long life at elevated temperatures. Its combination of 1800 µF capacitance, 525 V rating, screw‑terminal package, and series‑level endurance testing makes it well suited to DC link, inverter, and regenerative drive applications where reliable energy storage and robust connections are critical.

For engineers and procurement teams designing or upgrading power modules, the LNUN7182MSEG provides a verifiable specification set—capacitance, voltage rating, ripple current, temperature endurance, and insulation/voltage proof—that supports predictable system performance and lifetime in industrial environments.

If you would like pricing, availability, or a formal quote for LNUN7182MSEG, please request a quote or contact sales for assistance and detailed ordering information.