LQR2G681MSECBN

The LQR2G681MSECBN is an aluminum electrolytic capacitor in a screw-terminal radial can designed for power-electronics applications. It provides 680 µF capacitance at a 400 V rating and is optimized for high-speed charge–discharge operation at temperatures up to 85°C.

This part is suited for high-frequency regenerative voltage in AC servomotors and general inverters, for rectifier circuits such as voltage doublers, and for equipment operating in areas with fluctuating voltages. It is RoHS compliant.

Key Features

• Capacitance & Rated Voltage — 680 µF capacitance at a 400 V rated voltage, with a tolerance of ±20% (120 Hz, 20°C).
• High-speed charge–discharge design — Part of Nichicon’s LQR series engineered for 85°C high-speed charge–discharge applications; series endurance includes charge–discharge testing up to 20 million cycles under specified test conditions.
• Ripple current performance — Specified ripple current of 3.2 A at 120 Hz and 4.48 A at 10 kHz, supporting both low- and high-frequency ripple environments.
• Operating temperature & lifetime — Rated for −25°C to +85°C operation with an endurance specification of 5000 hours at 85°C under DC bias plus rated ripple current.
• Mounting & package — Screw terminal radial can package for secure bolted connections; physical size L: 8 × D: 3.5 cm.
• Leakage current specification — After 5 minutes’ application of rated voltage, leakage current is limited to not more than 3√(V) µA or 5 mA, whichever is smaller (at 20°C).
• Polarized design — Polar capacitor suitable for DC power applications common in inverters and motor drives.
• RoHS compliance — Conforms to the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• Motor drives & regenerative systems — Handles high-frequency regenerative voltages for AC servomotors where fast charge–discharge capability is required.
• Inverters & power conversion — Suited for general inverter DC-link and smoothing where robust ripple handling and high voltage rating are needed.
• Rectifier circuits (voltage doublers) — Appropriate for rectifier and voltage-doubler stages that require reliable high-voltage electrolytic storage.
• Equipment in fluctuating-voltage environments — Designed for systems exposed to voltage fluctuation, providing stable capacitance and endurance under stress.

Unique Advantages

• High-voltage energy storage: 680 µF at 400 V provides substantial stored energy for DC-link and smoothing applications.
• Designed for rapid cycling: LQR series specification includes charge–discharge endurance testing (up to 20 million cycles under defined conditions), supporting applications with frequent voltage swings.
• Frequency-resilient ripple capability: Rated ripple current values at both 120 Hz and 10 kHz help ensure reliable operation across a range of switching frequencies.
• Secure screw-terminal connections: Radial can with screw terminals enables robust, serviceable electrical and mechanical connections for industrial installations.
• Defined lifetime and thermal performance: Specified for −25°C to +85°C with an endurance rating of 5000 hours at 85°C under DC bias plus rated ripple current, supporting predictable long-term behavior.
• Regulatory compliance: RoHS conformance supports deployment in regions and products requiring restricted substance compliance.

Why Choose LQR2G681MSECBN?

The LQR2G681MSECBN is positioned for engineers designing industrial power systems that need a high-voltage, high-capacitance electrolytic capacitor with proven charge–discharge endurance and clear ripple-current ratings. Its screw-terminal radial package and defined thermal and lifetime specifications make it suitable for inverter DC-links, motor drive regenerative circuits, and rectifier stages in equipment exposed to voltage fluctuations.

This part from Nichicon’s LQR series offers verifiable specifications—leakage current limits, ripple current at multiple frequencies, temperature range, and endurance—helping teams plan for long-term reliability and predictable replacement cycles in demanding power-electronics designs.

Request a quote or contact sales to discuss pricing, availability, and integration details for LQR2G681MSECBN.