LQR2W123MSEJBN

The LQR2W123MSEJBN is an aluminum electrolytic capacitor from Nichicon's LQR series, configured in a screw-terminal radial can. It is engineered for high-speed charge–discharge operation and targeted at power-electronics applications that require high-frequency regenerative handling.

Typical use cases include regenerative voltage for AC servomotors, general inverters, rectifier circuits such as voltage doublers, and equipment operating in areas with fluctuating supply voltage. The capacitor combines high ripple-current capability with long endurance and RoHS compliance.

Key Features

• Capacitance & voltage: 12 mF rated at 450 V with ±20% tolerance (measured at 120 Hz, 20°C).
• High-speed charge–discharge design: Specified for 85°C high-speed charge–discharge applications to support fast energy transfer in regenerative circuits.
• High ripple-current capability: 35.5 A at 120 Hz and 49.7 A at 10 kHz to sustain heavy AC ripple in inverter and motor-drive systems.
• Screw-terminal mounting: Radial can with screw terminals for robust, low-resistance electrical and mechanical connections in power assemblies.
• Operating temperature & lifetime: Rated for −25°C to +85°C with an endurance rating of 5000 hours at 85°C under rated conditions.
• Charge–discharge endurance: Qualified for repetitive charge–discharge behavior (20 million cycles at ΔV = rated voltage × 0.3, 3 Hz, room temperature) per the datasheet endurance requirements.
• Leakage current specification: After 5 minutes at rated voltage, leakage current is ≤ 3√(V) μA or 5 mA (whichever is smaller) at 20°C.
• Regulatory compliance: Compliant with the RoHS Directive (2011/65/EU, (EU)2015/863).
• Polarized design: Polarized aluminum electrolytic construction for DC energy storage in power circuits.

Typical Applications

• AC servomotor regenerative circuits: Handles high-frequency regenerative voltages and rapid charge–discharge cycles commonly found in servo drives.
• General inverters: Supports DC-link and smoothing functions in inverter power stages where high ripple current capability is required.
• Voltage-doubler rectifier circuits: Suited for rectifier configurations such as voltage doublers that experience fluctuating DC levels.
• Power equipment in fluctuating-voltage environments: Designed for systems that operate in areas with unstable supply voltage, providing robust energy buffering and smoothing.

Unique Advantages

• Designed for regenerative power handling: High-speed charge–discharge construction and elevated ripple-current ratings help manage energy returned from motor drives and inverters.
• High ripple-current performance: Rated ripple currents at both 120 Hz and 10 kHz enable effective smoothing across a wide frequency range encountered in power electronics.
• Long operational endurance: 5000 hours at 85°C endurance plus validated charge–discharge cycling (20 million cycles under specified conditions) contribute to predictable lifetime in demanding applications.
• Secure screw-terminal connections: Screw-terminal radial can package provides reliable mechanical fastening and low-resistance electrical contacts for power assemblies.
• Clear leakage and stability specifications: Leakage current limit and low-temperature impedance guidance provide verifiable performance metrics for system design.
• RoHS compliant manufacturing: Conforms to relevant RoHS directives for environmentally regulated applications.

Why Choose LQR2W123MSEJBN?

The LQR2W123MSEJBN offers a purpose-built combination of high capacitance (12 mF), 450 V rating, and elevated ripple-current capability that suits it for inverter, servo, and other power-electronics designs requiring robust energy buffering and fast charge–discharge performance. Its screw-terminal radial package and polarized aluminum electrolytic construction simplify integration into power assemblies.

With defined endurance (5000 hours at 85°C) and charge–discharge cycling qualifications, along with explicit leakage current limits and RoHS compliance, this capacitor provides verifiable performance characteristics for engineers specifying components for demanding regenerative and fluctuating-voltage environments.

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