LQR2G392MSEG

The LQR2G392MSEG is an aluminum electrolytic capacitor in Nichicon's LQR series designed as a screw terminal, high speed charge-discharge device. With a rated capacitance of 3.9 mF and a 400 V rating, it targets power-electronics applications that require robust high-voltage bulk energy storage and frequent charge-discharge cycling.

Engineered for use in environments with voltage fluctuations and high-frequency regenerative events, this capacitor combines a 85°C temperature rating, defined endurance characteristics, and screw-terminal mounting for secure connections in inverter and servo-drive systems.

Key Features

• Capacitance & Voltage — 3.9 mF nominal capacitance at a 400 V rated voltage for high-voltage DC link and energy buffer applications.
• Screw Terminal Package — Radial can with screw terminals for secure, low-impedance connections suitable for high current paths.
• High-Speed Charge–Discharge — Designed for high speed charge-discharge behavior; endurance validated by 20 million charge-discharge cycles (ΔV = rated voltage × 0.3, 3 Hz) with specified limits on capacitance change, tan δ and leakage current.
• Ripple Current Capability — Rated ripple current of 16 A at 120 Hz and 22.4 A at 10 kHz to support both low- and high-frequency ripple in power conversion circuits.
• Thermal and Mechanical — Operating temperature range −25 °C to +85 °C and a lifetime specification of 5000 hours at 85 °C under rated conditions.
• Electrical Losses — Equivalent series resistance specified at 150 mΩ (measured at 120 Hz) to help assess dissipation and thermal loading in designs.
• Leakage Current — After 5 minutes at rated voltage, leakage current is not more than 3√(V) µA or 5 mA, whichever is smaller (measured at 20 °C).
• RoHS Compliant — Meets RoHS directive requirements for restricted substances.

Typical Applications

• AC Servomotor Drives — Supports high-frequency regenerative voltage events and energy recovery in servo drive DC-link and braking circuits.
• General Inverters — Bulk energy storage and smoothing for inverter input/output stages in industrial power conversion.
• Voltage‑Fluctuating Equipment — Stabilizes DC bus voltage in systems operating in environments with frequent voltage transients.
• Rectifier / Voltage Doubler Circuits — Suited for rectifier circuits including voltage-doubler topologies where robust high-voltage capacitance and charge‑discharge endurance are required.

Unique Advantages

• High-voltage energy storage: 400 V rating with 3.9 mF capacitance provides substantive DC-link buffering for medium-voltage power electronics designs.
• Designed for repetitive cycling: Endurance validated by a 20 million cycle charge–discharge test and 5000 hours at 85 °C ensures predictable behavior under frequent switching and ripple stress.
• High ripple handling at HF: 22.4 A ripple current rating at 10 kHz supports high-frequency inverter and regenerative applications without overstressing the capacitor.
• Secure, low-impedance connections: Screw-terminal radial can package enables robust electrical and mechanical attachment for high-current bus implementations.
• Measured dissipation data: ESR specified at 150 mΩ (120 Hz) allows accurate thermal and loss budgeting during system design.
• Compliance and quality controls: RoHS compliance and documented leakage/endurance criteria provide traceable performance expectations for industrial designs.

Why Choose LQR2G392MSEG?

The LQR2G392MSEG is positioned for engineers designing industrial power electronics who need a high-voltage aluminum electrolytic capacitor with proven charge–discharge endurance, defined ripple capability at both low and high frequency, and a robust screw-terminal package for secure integration. Its specified electrical and thermal characteristics make it suitable for inverter and regenerative applications where predictable lifetime and leakage behavior are required.

This part benefits designs that demand stable DC-link energy storage under voltage fluctuation and frequent cycling. The combination of a 400 V rating, 3.9 mF capacitance, quantified ESR and ripple specs, and RoHS compliance supports reliable deployment and easier validation in industrial equipment.

If you need pricing, lead-time details or a formal quote for LQR2G392MSEG, request a quote or contact sales to discuss quantity, delivery and technical requirements.