LQR2W182MSEFBN

The LQR2W182MSEFBN is a Nichicon LQR-series aluminum electrolytic capacitor in a screw-terminal radial can designed for high-speed charge–discharge applications. It provides 1.8 mF of capacitance at a 450 V rating and is optimized for power-electronics environments that demand robust regenerative and fluctuating-voltage performance.

Typical use cases include AC servomotor regenerative circuits, general inverters, rectifier circuits such as voltage doublers, and other equipment operating in areas with fluctuating supply voltages. Key value comes from its high-voltage handling, defined ripple-current capability at both low and high frequencies, and endurance under rated conditions.

Key Features

• Capacitance & Voltage — 1.8 mF (1800 µF) nominal capacitance with a 450 V rated voltage and tolerance of ±20%.
• High-Speed Charge–Discharge — LQR series designation for 85°C high-speed charge–discharge behavior; specified for charge–discharge endurance of 20 million cycles (ΔV = rated × 0.3, 3 Hz) at room temperature.
• Endurance at Elevated Temperature — Rated endurance: 5000 hours at 85°C with DC bias plus rated ripple current; post-test limits: capacitance within ±20%, tan δ ≤ 300% of initial, leakage current ≤ initial specified value.
• Ripple Current Performance — Rated ripple current of 7.4 A at 120 Hz and 10.36 A at 10 kHz to support both low- and high-frequency switching environments.
• Operating Temperature Range — −25°C to +85°C with a low-temperature impedance characteristic Z(−25°C)/Z(+20°C) = 8 for the 350–450 V range.
• Package & Mounting — Screw terminal radial can package for secure, high-current connections; physical size: L 11 cm × D 5.1 cm.
• Leakage Current Specification — After 5 minutes at rated voltage, leakage current is specified as not more than 3√(V) µA or 5 mA, whichever is smaller (measured at 20°C).
• Polarized — Electrolytic (polar) construction; marked with white lettering on a dark-brown sleeve per series marking standard.
• RoHS Compliance — Compliant with the RoHS Directive (2011/65/EU, (EU)2015/863).

Typical Applications

• AC Servomotor Regenerative Circuits — Absorbs and supplies regenerative energy with high-speed charge–discharge capability suitable for frequent energy reversals.
• General Inverters — DC bus smoothing and energy buffering for inverter systems operating at high voltage and switching frequencies.
• Rectifier / Voltage Doubler Circuits — Suited for rectifier stages where voltage-doubler topologies and fluctuating DC levels require stable high-voltage capacitance.
• Equipment in Voltage-Fluctuating Areas — Provides stable energy storage and tolerance to fluctuating supply conditions in industrial power environments.

Unique Advantages

• Substantial DC Energy Storage: 1.8 mF at 450 V provides significant stored energy for DC-bus and regenerative applications.
• Designed for Repetitive Charge–Discharge: LQR series charge–discharge endurance (20 million cycles at specified test conditions) targets applications with frequent energy reversals.
• Defined High-Frequency Performance: Specified ripple currents at 120 Hz and 10 kHz support both traditional and high-frequency switching environments.
• Predictable Lifetime Under Load: 5000 hours endurance at 85°C under DC bias plus rated ripple current provides a clear reference for reliability planning.
• Screw-Terminal Mechanical Robustness: Radial can with screw terminals enables secure high-current terminations suited to power assemblies.
• Regulatory Compliance: RoHS conformity supports restricted-substance requirements in global equipment deployment.

Why Choose LQR2W182MSEFBN?

The LQR2W182MSEFBN combines high-voltage (450 V) energy storage with explicit design for high-speed charge–discharge cycles and defined ripple-current capability—making it a practical choice for power-electronics designers working on inverters, servo drives, regenerative power circuits, and rectifier/doubler topologies. Its endurance ratings (5000 h at 85°C and specified charge–discharge cycle life) provide measurable parameters for lifetime and reliability planning.

Manufactured by Nichicon as part of the LQR series, this screw-terminal radial-can capacitor is intended for engineers who need a robust, verifiable capacitor solution for fluctuating-voltage and high-frequency regenerative environments while maintaining RoHS compliance.

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