LQR2W123MSEJ

The LQR2W123MSEJ is an aluminum electrolytic capacitor in a screw-terminal radial can designed for high-speed charge–discharge applications. It provides 12 mF capacitance at a 450 V rating and is optimized for power-electronics environments such as AC servomotor regenerative circuits and general inverters.

With an operating temperature range of -25 °C to +85 °C and targeted features for frequent charge–discharge duty, this part addresses equipment used in voltage-fluctuating areas and rectifier circuits (voltage doubler) while maintaining RoHS compliance.

Key Features

• High nominal capacitance: 12 mF (12,000 µF) provides substantial bulk energy storage for power electronics and regenerative energy capture.
• High voltage rating: 450 V rated voltage suitable for high-voltage inverter and motor-drive circuits.
• Screw-terminal radial can package: Screw terminal mounting and radial can body enable robust, low-impedance connections for high-current systems.
• High-speed charge–discharge capability: Designed for high speed charge–discharge and applications with frequent regenerative voltage events.
• Ripple current handling: 35.5 A at 120 Hz and 49.7 A at 10 kHz, supporting substantial AC ripple currents in power conversion environments.
• Endurance and lifecycle: Endurance specified as 5000 hours at 85 °C under rated bias and ripple; charge–discharge endurance validated up to 20 million cycles (ΔV = rated × 0.3, 3 Hz) per datasheet criteria.
• Operating temperature range: -25 °C to +85 °C with low-temperature impedance stability (Z(-25 °C)/Z(+20 °C) ≤ 8).
• Leakage current specification: After 5 minutes at rated voltage, leakage current ≤ 3√(V) µA or 5 mA, whichever is smaller (at 20 °C).
• RoHS compliant: Compliant to the RoHS Directive (2011/65/EU, (EU)2015/863).

Typical Applications

• AC servomotor drives: Energy capture and regenerative voltage buffering where frequent charge–discharge events occur.
• General inverters: Bulk energy storage and ripple current accommodation for inverter DC-link and power-stage stabilization.
• Voltage-doubler rectifier circuits: Support for rectifier and DC bus applications that require high-voltage capacitance.
• Equipment operating in fluctuating-voltage areas: Use where line or load conditions produce frequent voltage swings and regenerative events.

Unique Advantages

• Large energy reservoir at high voltage: 12,000 µF at 450 V delivers significant DC-link capacitance for power conversion designs.
• Designed for high-frequency stress: Specified ripple currents at both low and high frequencies (120 Hz and 10 kHz) to handle real-world inverter and regenerative loads.
• Durability under continuous bias: 5000-hour endurance at 85 °C demonstrates sustained performance under rated conditions.
• Validated charge–discharge endurance: Datasheet-defined test of 20 million cycles for repeated regenerative charge–discharge behavior reduces risk in cycling applications.
• Screw-terminal connectivity: Mechanically secure terminals simplify installation and support robust current paths in high-power assemblies.
• Regulatory compliance: RoHS conformity simplifies integration into products targeting restricted-substance requirements.

Why Choose LQR2W123MSEJ?

The LQR2W123MSEJ combines high capacitance and 450 V rating with design features tailored for high-speed charge–discharge and regenerative power applications. Its ripple-current capabilities, validated endurance, and screw-terminal construction make it a practical choice for engineers building inverter, motor-drive, and rectifier systems that must tolerate frequent cycling and voltage fluctuations.

With clear endurance and leakage specifications and RoHS compliance, this Nichicon LQR-series part is suited for designs where durable, high-voltage bulk capacitance and reliable terminal connections are required. It is appropriate for equipment-level power electronics requiring predictable performance over extended operation at elevated temperatures.

Request a quote or submit a parts inquiry to receive pricing and availability information for the LQR2W123MSEJ. Our team can provide technical assistance and support for integrating this capacitor into your power-electronics design.