LNU2W123MSEJBN

The LNU2W123MSEJBN is a screw‑terminal aluminum electrolytic capacitor from Nichicon’s LNU series, designed for high‑voltage industrial power applications. It combines a 12 mF capacitance with a 450 V DC rating and a compact screw‑terminal can for robust connections in power electronics.

Engineered for inverter and regenerative circuits, this part offers long life at elevated temperature (5000 hours at 105°C) and is optimized to handle high ripple and rapid charge–discharge cycles commonly found in industrial drives and inverter supplies. It is RoHS compliant.

Key Features

• Capacitance & Voltage — 12 mF capacitance rated at 450 V DC, providing bulk energy storage for high‑voltage power rails.
• High‑Temperature Endurance — Rated for operation from –40°C to +105°C with a specified load life of 5000 hours at 105°C under rated ripple conditions.
• High Ripple Current Handling — Capable of 29.9 A at 120 Hz and 41.86 A at 10 kHz, supporting both low‑ and high‑frequency ripple environments.
• Robust Charge–Discharge Performance — Designed to cope with high‑speed charge–discharge loading and high‑frequency regenerative voltages encountered in motor drive and inverter systems.
• Screw Terminal Package — Radial can with screw terminals for secure, low‑impedance electrical and mechanical connections in industrial assemblies.
• Polarized, ±20% Tolerance — Polarized electrolytic construction with capacitance tolerance of –20% to +20% (measured at 120 Hz, 20°C).
• RoHS Compliant — Meets the RoHS directive (2011/65/EU,(EU)2015/863).

Typical Applications

• Industrial Inverter Power Supplies — Bulk energy storage and smoothing for inverter DC links used in industrial drives and converters.
• AC Servomotor Regeneration — Handles high‑frequency regenerative voltages for servo drives and motion control systems.
• High‑Speed Charge/Discharge Circuits — Suited for applications that require rapid energy transfer and robust cycle endurance.
• General Industrial Power Electronics — Filtering and energy buffering in medium‑to‑high voltage power assemblies where long life at elevated temperature is required.

Unique Advantages

• High‑Voltage Capability: 450 V DC rating enables use in elevated DC link and inverter bus voltages.
• Compact High‑Voltage Design: LNU series offers a smaller footprint compared with earlier LNT parts, helping save space in dense power assemblies.
• High Ripple Endurance: Specified ripple current at both 120 Hz and 10 kHz supports diverse switching frequencies and reduces thermal stress under load.
• Extended High‑Temperature Lifetime: 5000 hours at 105°C under rated ripple ensures predictable ageing and service life in demanding thermal environments.
• Secure Screw‑Terminal Connection: Radial can with screw terminals provides reliable mechanical fastening and low‑resistance electrical contact for heavy current paths.
• Designed for Regenerative Loads: Engineered to cope with high‑frequency regenerative voltage and frequent charge–discharge cycles common in motor drive applications.

Why Choose LNU2W123MSEJBN?

LNU2W123MSEJBN is positioned for engineers specifying high‑voltage bulk capacitors in industrial inverter and motor drive systems where elevated temperature endurance, high ripple capability, and secure screw‑terminal connections are required. Its 450 V rating, high ripple current specs, and 5000‑hour life at 105°C deliver a dependable energy storage element for demanding power electronics.

This part is ideal for designs that require proven electrolytic performance in compact high‑voltage packages and long operational life under thermal and electrical stress. As part of Nichicon’s LNU series, it provides a series‑level option for upgrading or standardizing capacitor choices across inverter and regenerative power designs.

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