LQR2W681MSECBN

The LQR2W681MSECBN is an aluminum electrolytic capacitor in a screw terminal, radial can package designed for high-speed charge–discharge applications. It delivers 680 μF capacitance at a 450 V rating with a polarized design and is part of Nichicon's LQR series.

Built for power-conversion environments, this capacitor is suited for high-frequency regenerative voltage in AC servomotors, general inverters, rectifier circuits such as voltage doublers, and equipment operated in areas with fluctuating line voltage. Key value comes from its high-voltage energy storage, elevated ripple-current capability, charge–discharge endurance and 85°C rated operation.

Key Features

• Capacitance & Voltage: 680 μF rated capacitance with a 450 V rated voltage for high-voltage energy storage.
• Package & Mounting: Radial can with screw terminals for robust, low-impedance power connections suitable for industrial mounting styles.
• Operating Temperature Range: Specified for −25°C to +85°C operation with endurance guaranteed at 85°C.
• Charge–Discharge Endurance: Designed for high-speed charge–discharge behavior; endures 20 million charge–discharge cycles (ΔV = rated voltage × 0.3, cycle 3 Hz) at room temperature per the series specification.
• Ripple Current Performance: Rated ripple-current handling of 3.5 A at 120 Hz and 4.9 A at 10 kHz for demanding power-conversion duty.
• Lifetime & Reliability: Specified lifetime of 5000 hours at 85°C with defined limits for capacitance change, tan δ, and leakage current after endurance testing.
• Leakage Current Specification: After 5 minutes at rated voltage, leakage current is not more than 3√(√V) μA or 5 mA, whichever is smaller (at 20°C), per the series datasheet.
• Capacitance Tolerance: ±20% at 120 Hz, 20°C.
• RoHS Compliance: Compliant to RoHS Directive (2011/65/EU, (EU)2015/863).

Typical Applications

• AC Servomotor Drives: Handles high-frequency regenerative voltages encountered in motor-control feedback and energy recovery circuits.
• General Inverters: Used in inverter DC-link and buffering stages where high-voltage storage and rapid charge–discharge are required.
• Voltage Doubler Rectifiers: Suited for rectifier circuits of voltage doubler topologies requiring stable high-voltage capacitance.
• Equipment in Fluctuating-Voltage Areas: Applied where supply voltage varies and robust energy storage with endurance is needed.

Unique Advantages

• High-voltage energy storage: 450 V rating combined with 680 μF capacitance provides substantial stored energy for DC-link and regenerative circuits.
• Designed for high-speed cycling: Series-specified high-speed charge–discharge capability and tested endurance (20 million cycles at ΔV = rated × 0.3) improve suitability for frequent switching environments.
• High ripple-current capability: Specified ripple currents of 3.5 A (120 Hz) and 4.9 A (10 kHz) address both low- and high-frequency ripple conditions in power electronics.
• Operational reliability at elevated temperature: 5000 hours endurance at 85°C ensures sustained performance under continuous thermal stress.
• Robust screw-terminal mounting: Screw terminals and radial can packaging facilitate secure, low-impedance connections for industrial power assemblies.
• Standards-aligned environmental compliance: RoHS directive compliance supports regulatory needs for deployed equipment.

Why Choose LQR2W681MSECBN?

The LQR2W681MSECBN from Nichicon’s LQR series targets high-voltage power systems that require reliable energy storage, high ripple-current handling and proven charge–discharge endurance. Its 450 V rating, specified ripple currents at both 120 Hz and 10 kHz, and endurance ratings at 85°C make it a pragmatic choice for inverter and motor-drive designers coping with regenerative energy and fluctuating supply conditions.

This capacitor is suited for engineers specifying components for industrial power-conversion equipment where long operational life, predictable electrical behavior, and rugged screw-terminal mounting are important for system robustness and maintainability.

Request a quote or submit a parts inquiry to discuss availability, delivery lead times and how the LQR2W681MSECBN fits your specific power-electronics design requirements.