LQR2G123MSEJ

The LQR2G123MSEJ is a screw-terminal aluminum electrolytic capacitor from Nichicon's LQR series, offering 12,000 µF capacitance at a 400 V rating. It is a radial, can-style, screw-terminal power capacitor designed for high-speed charge–discharge and demanding power-electronics applications.

Targeted at industrial power systems, the device is suited for use in regenerative circuits, inverters and equipment exposed to fluctuating voltages. Key value comes from its high ripple-current capability, robust screw-terminal mounting and an endurance rating specified for 5,000 hours at 85°C.

Key Features

• Capacitance & Voltage – 12,000 µF rated capacitance at 400 V for bulk energy storage and DC-link applications.
• Tolerance & Loss – Capacitance tolerance of −20% to +20% and tan δ = 0.15 (measured at 20°C, 120 Hz), enabling predictable AC behavior at the specified test conditions.
• High Ripple Current – Low-frequency ripple current 37.6 A (120 Hz) and high-frequency ripple current 52.64 A (100 kHz) to support heavy AC and switching loads.
• Thermal Performance & Lifetime – Rated for operation from −25°C to +85°C with an endurance of 5,000 hours at 85°C under rated conditions.
• Endurance & Charge–Discharge Robustness – Series specifications include endurance under DC bias plus rated ripple current and charge–discharge cycling criteria for sustained reliability.
• Mounting & Package – Screw-terminal radial can with robust terminals suited for secure power connections in industrial assemblies.
• Leakage Current Specification – Series-level leakage limit: after 5 minutes at rated voltage, leakage current ≤ 3√(C√V) µA or 5 mA, whichever is smaller (C = capacitance in µF, V = voltage in V).
• RoHS Compliance – Product is RoHS compliant as stated for the LQR series.
• Physical Size – Package dimensions L: 17 × D: 9 cm for mechanical planning and enclosure design.

Typical Applications

• AC Servo and Regenerative Drives – Supports high-frequency regenerative voltage and high-speed charge–discharge cycles where large bulk capacitance and high ripple handling are required.
• General Inverters – Acts as DC-link/bulk energy storage in inverter stages, providing stable DC bus filtering under fluctuating load and voltage conditions.
• Rectifier / Voltage Doubler Circuits – Suitable for use in rectifier and voltage-doubling topologies that require large capacitance and reliable long-term endurance.
• Industrial Power Electronics – Fits equipment operating in voltage-fluctuating environments where durability, high ripple current capability and screw-terminal mounting are beneficial.

Unique Advantages

• High energy storage at elevated voltage – 12,000 µF at 400 V supplies substantial DC-link energy for power conversion and buffering.
• Designed for heavy ripple loads – Specified ripple currents at 120 Hz and 100 kHz support both low- and high-frequency switching environments.
• Specified endurance for reliability – 5,000-hour rating at 85°C gives a clear, verifiable lifetime metric for thermal design and maintenance planning.
• Robust screw-terminal mounting – Screw terminals provide secure, low-resistance connections suited to industrial assemblies and high-current paths.
• Series-level charge–discharge qualification – LQR series includes high-speed charge–discharge endurance testing, aligning the part to applications with frequent cycling.
• Regulatory compliance – RoHS-compliant construction supports environmental and regulatory requirements.

Why Choose LQR2G123MSEJ?

LQR2G123MSEJ delivers high-capacity, high-voltage energy storage in a screw-terminal aluminum electrolytic package engineered for demanding power-electronics environments. With specified ripple-current ratings at both low and high frequencies, a clear 5,000-hour endurance at 85°C, and series-proven charge–discharge robustness, it fits designs that require predictable performance under heavy electrical stress.

Manufactured by Nichicon and built on the LQR series platform, this capacitor is appropriate for engineers building industrial inverters, servo drives, rectifier systems and other equipment exposed to fluctuating voltages where long-term reliability and robust connections are essential.

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