LNUN7102MSEF

The LNUN7102MSEF is a screw‑terminal aluminum electrolytic capacitor in Nichicon’s LNU series, engineered for high‑voltage DC link and energy‑storage roles. It delivers 1 mF capacitance at a rated voltage of DC525V in a compact radial can with screw terminals.

Designed for industrial power electronics, this capacitor targets inverter circuitry, regenerative voltage circuits for AC servomotors and general inverters, offering high ripple handling and prolonged operation at elevated temperatures.

Key Features

• Capacitance & Rated Voltage — 1 mF nominal capacitance with a rated voltage of DC525V and capacitance tolerance of ±20% (–20%~20%).
• Temperature Range & Lifetime — Operates from –40°C to 105°C and is specified for a load life of 5000 hours at 105°C when subjected to rated ripple current.
• Ripple Current Performance — Capable of 5.4 A ripple current at 120 Hz and 7.56 A at 10 kHz, supporting both low‑frequency and high‑frequency power environments.
• Construction & Mounting — Polarized radial can with screw‑terminal mounting (nominal bolt M5 for the 51 mm diameter variant); robust mechanical attachment for industrial assemblies.
• Endurance Characteristics — When subjected to rated DC bias plus ripple for 5000 hours at 105°C, the capacitor meets endurance criteria including capacitance change within ±20% and leakage current at or below initial specified values.
• Regulatory Compliance — RoHS compliant (2011/65/EU, (EU)2015/863).
• Package Dimensions — Compact form factor with dimensions L: 9.5 × D: 5.1 cm and seated height up to 3.74 inch for efficient PCB/assembly integration.

Typical Applications

• Industrial Power Supplies: DC link and bulk energy storage in inverter power supplies where high voltage and reliable high‑temperature operation are required.
• Inverter and Motor Drives: Regenerative voltage buffering for AC servomotor drives and general inverter systems, leveraging the capacitor’s high‑voltage rating and ripple capability.
• High‑Frequency Charge/Discharge Systems: Circuits that experience rapid charge/discharge cycles benefit from the series’ endurance to high‑speed loading.
• Regenerative Energy Circuits: Energy absorption and smoothing in regenerative circuits, where sustained performance at elevated temperatures is necessary.

Unique Advantages

• High DC Voltage in a Compact Package: Rated up to DC525V while maintaining a smaller footprint than comparable series, enabling space‑efficient high‑voltage designs.
• Designed for High‑Temperature Operation: Specified for 5000 hours at 105°C under rated ripple, providing predictable long‑term performance in hot industrial environments.
• Broad Ripple‑Frequency Capability: Ripple ratings at 120 Hz and 10 kHz cover both mains‑frequency smoothing and high‑frequency inverter conditions, reducing the need for multiple capacitor types.
• Secure Screw‑Terminal Mounting: Screw terminals with an M5 nominal bolt ensure reliable electrical and mechanical connections in heavy‑duty assemblies.
• Endurance‑Verified Performance: Meets endurance criteria for capacitance stability, dissipation factor (tan δ), and leakage after long‑term DC bias plus ripple testing at 105°C.
• RoHS Compliance: Conforms to current RoHS directives for use in regulated assemblies.

Why Choose LNUN7102MSEF?

The LNUN7102MSEF is positioned for designs that need high‑voltage energy storage in a compact, industrial‑grade package. Its combination of DC525V rating, 1 mF capacitance, high ripple capability across frequencies, and a 5000‑hour high‑temperature life make it suitable for inverter DC link, regenerative circuits, and other demanding power‑electronics roles.

This capacitor is a pragmatic choice for engineers and procurement teams building or maintaining industrial power supplies and motor drive systems that require reliable high‑temperature endurance, secure screw‑terminal mounting, and RoHS compliance.

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