LNUN7472MSEH

The LNUN7472MSEH is a screw‑terminal aluminum electrolytic capacitor from Nichicon's LNU series, designed for high‑voltage industrial power electronics. It delivers 4.7 mF (4700 µF) capacitance at a rated DC voltage of 525 V and is built for demanding inverter and regenerative environments.

Engineered for compact, high‑voltage applications, the LNUN7472MSEH offers a smaller footprint than older LNT models while providing long life at elevated temperature, high ripple current capability, and charge–discharge endurance suited to inverter circuitry and servo drive regenerative loops.

Key Features

• High voltage rating: Rated up to DC 525 V for industrial inverter and power supply applications.
• Large capacitance: 4.7 mF (4700 µF) with ±20% tolerance (120 Hz, 20°C) to support energy buffering and smoothing in high‑voltage DC buses.
• Screw terminal package: Radial can with screw terminals for secure, low‑impedance connections in power assemblies.
• Wide operating temperature: Specified for –40°C to +105°C to cover demanding thermal environments.
• Extended load life: 5000 hours at 105°C under rated ripple current, providing durability in continuous high‑temperature operation.
• High ripple current capability: 15.2 A at 120 Hz and 21.28 A at 10 kHz, enabling effective handling of both low‑ and high‑frequency ripple.
• Charge/discharge endurance: Designed to withstand repeated high‑speed charge–discharge cycling (endurance test: 50 million cycles as described in datasheet).
• Insulation and voltage proof: Insulation resistance >100 MΩ at DC 500 V between terminal and bracket; passes AC 2500 V for 1 minute between terminal and bracket.
• RoHS compliant: Conforms to RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• Industrial inverter power supplies: Bulk energy storage and DC bus smoothing for general inverters and power conversion modules.
• AC servomotor drives: Handles high‑frequency regenerative voltages and rapid charge–discharge cycles in servo and motion control systems.
• High‑frequency regenerative circuits: Suited for circuits that require frequent energy recovery and high ripple current at kHz frequencies.

Unique Advantages

• High‑voltage capability: 525 V rating lets designers reduce part count on high‑voltage DC rails by using a single capacitor with suitable voltage margin.
• Compact high‑voltage option: Smaller physical size compared with earlier LNT models while maintaining high voltage and capacitance for space‑constrained power assemblies.
• Designed for continuous high‑temperature operation: 5000‑hour load life at 105°C provides predictable aging and long operational life in elevated ambient conditions.
• Robust ripple handling: Specified ripple current at both low (120 Hz) and high (10 kHz) frequencies supports a wide range of switching topologies.
• Proven electrical durability: Endurance tested for extensive charge–discharge cycles and specified leakage/insulation characteristics for reliable long‑term performance.
• Regulatory compliance: RoHS conformity supports deployment in regions requiring restricted substance compliance.

Why Choose LNUN7472MSEH?

The LNUN7472MSEH balances high capacitance and 525 V rating in a screw‑terminal, radial can package optimized for industrial inverter and regenerative applications. Its combination of high ripple current capability, long rated life at 105°C, and verified charge–discharge endurance make it a practical choice for designers building robust power supplies, servo drives, and high‑frequency regenerative circuits.

Backed by Nichicon's LNU series specifications, this capacitor is suited for engineers seeking a compact high‑voltage energy storage device with defined electrical and environmental performance for demanding industrial power designs.

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