LQR2G103MSEJ

The LQR2G103MSEJ is a 10 mF, 400 V polarized aluminum electrolytic capacitor in a screw-terminal radial can designed for high-speed charge–discharge applications. Part of Nichicon’s LQR series, it is engineered for high-frequency regenerative voltages and demanding inverter/motor-drive environments where robust energy buffering and reliable ripple handling are required.

Its construction and performance targets make it suitable for general inverters, AC servomotor regenerative circuits, rectifier circuits (including voltage doubler configurations), and equipment operating in areas with fluctuating supply voltage.

Key Features

• Core electrical specifications: 10 mF capacitance with a 400 V rated voltage and ±20% tolerance (at 120 Hz, 20°C), providing substantial energy storage for DC-bus and regenerative applications.
• High ripple capability: Rated ripple current of 32.7 A at 120 Hz and 45.78 A at 10 kHz, supporting high-current, high-frequency operation in power-conversion systems.
• Charge–discharge endurance: Designed for high-speed charge–discharge behavior; end-of-life specifications are maintained after 20 million cycles (ΔV = rated × 0.3, 3 Hz) at room temperature per series endurance criteria.
• Thermal and lifetime performance: Operating temperature range −25°C to 85°C with an endurance rating of 5000 hours at 85°C under DC bias plus rated ripple current.
• Robust mechanical mounting: Screw terminal, radial can package for secure, low-impedance connections in high-current layouts and industrial assemblies.
• Environmental compliance: RoHS compliant (2011/65/EU, (EU)2015/863), supporting regulatory requirements for restricted substances.
• Physical size: Package dimensions listed as L: 15 × D: 9 cm, available in the LQR screw-terminal form factor for straightforward system integration.

Typical Applications

• AC servo and motor drives: Energy buffering and regenerative voltage handling for servomotor controllers and drive units.
• General inverters: DC-link and smoothing duties in inverter systems where frequent charge–discharge cycles and high ripple currents occur.
• Regenerative braking circuits: High-speed charge–discharge capability suited to absorbing and releasing energy in braking/regeneration events.
• Rectifier and voltage-doubler circuits: Use in rectifier topologies that require large capacitance and stable performance under fluctuating supply conditions.
• Industrial equipment in fluctuating-voltage areas: Systems exposed to variable or unstable mains where robust DC filtering and ride-through energy are needed.

Unique Advantages

• High energy density at 400 V: 10 mF capacitance at a 400 V rating provides substantial DC-bus energy storage for power-electronics designs.
• Designed for high-frequency ripple: Specified ripple current at both low (120 Hz) and high (10 kHz) frequencies enables reliable performance across switching regimes.
• Durability under cycling: Endurance validated for millions of charge–discharge cycles and 5000 hours at elevated temperature, helping maintain system stability over time.
• Screw terminal connectivity: Facilitates secure, low-resistance connections for high-current paths and simplifies installation and maintenance in industrial assemblies.
• Meets RoHS requirements: Reduces regulatory risk and simplifies integration into products requiring restricted-substance compliance.

Why Choose LQR2G103MSEJ?

The LQR2G103MSEJ is positioned for power-electronics applications that require a combination of high capacitance, high-voltage rating, and robust ripple/charge–discharge performance. Its screw-terminal radial can form factor and specified ripple currents make it appropriate for inverter DC-link, regenerative braking, and rectifier topologies where reliable energy buffering under fluctuating voltages is essential.

Engineers designing industrial drives, inverters, and power-supply systems will find the LQR2G103MSEJ a practical choice for improving system resilience and reducing downtime, supported by Nichicon’s series specifications for endurance and thermal performance.

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