LQR2G392MSEGBN

The LQR2G392MSEGBN is an aluminum electrolytic capacitor in a screw-terminal radial can designed for high speed charge–discharge environments. It delivers 3.9 mF capacitance at a 400 V rated voltage and is polarized for DC applications.

Engineered for applications with high-frequency regenerative voltage and fluctuating supply conditions, this part targets AC servomotor drives, general inverters and rectifier circuits such as voltage doublers. It combines high ripple capability and low ESR with a 5,000 hour endurance at 85°C for robust performance in demanding power systems.

Key Features

• Electrical capacity — 3.9 mF capacitance with a tolerance of ±20% (measured at 120 Hz, 20°C), rated at 400 V DC for high-voltage DC bus applications.
• High ripple and frequency performance — Rated ripple currents of 16 A at 120 Hz and 22.4 A at 10 kHz support high-frequency regenerative and inverter loads.
• Low equivalent series resistance (ESR) — ESR of 150 mΩ at 120 Hz reduces losses during high-current charge/discharge cycles.
• Thermal and lifetime specification — Operating temperature range −25°C to +85°C and a rated lifetime of 5,000 hours at 85°C under specified conditions.
• Charge–discharge endurance — Qualified to endure 20 million charge–discharge cycles (ΔV = rated voltage × 0.3, 3 Hz) at room temperature while meeting endurance criteria for capacitance, tan δ and leakage current.
• Leakage current specification — After 5 minutes at rated voltage, leakage current is ≤ 3√V μA or 5 mA, whichever is smaller (measured at 20°C).
• Robust mechanical mounting — Screw terminal, radial can package provides secure, low-impedance connections for high-current installations.
• Regulatory compliance — RoHS compliant (2011/65/EU, (EU)2015/863).
• Identification — Marked with white lettering on a dark-brown sleeve for clear part identification.

Typical Applications

• AC servomotor drives — Handles high-frequency regenerative voltage and rapid charge–discharge cycles common in motor control systems.
• General inverters — Supports DC link filtering and energy buffering in inverter designs operating under fluctuating supply conditions.
• Voltage doubler rectifier circuits — Suitable for use in rectifier stages where stable DC bus capacitance and high ripple tolerance are required.
• Equipment exposed to fluctuating voltages — Provides energy storage and transient smoothing where supply variation is frequent.

Unique Advantages

• High ripple handling: Rated ripple currents at both low and high frequencies reduce thermal stress and support high-speed regenerative events.
• Low ESR: 150 mΩ at 120 Hz minimizes I2R losses and improves efficiency during rapid discharge and recharge cycles.
• Durable under thermal stress: 5,000 hours at 85°C rating provides predictable service life in elevated-temperature installations.
• Proven charge–discharge endurance: Qualification for 20 million cycles at ΔV = 0.3×rated ensures reliability in cyclic power applications.
• Screw-terminal mounting: Solid mechanical and electrical connection simplifies installation for high-current DC bus assemblies.
• RoHS compliance: Meets current RoHS requirements for use in regulated markets.

Why Choose LQR2G392MSEGBN?

The LQR2G392MSEGBN is positioned for power-electronic designs that require reliable, high-voltage DC energy storage with strong charge–discharge performance. Its combination of 400 V rating, high ripple capability across frequencies, and measured low ESR makes it suitable for inverter and motor-drive systems where regenerative events and fluctuating voltages are common.

Designed and manufactured by Nichicon, this screw-terminal aluminum electrolytic capacitor is a practical choice for engineers seeking a robust, serviceable capacitor solution with documented endurance and thermal performance for medium-term deployment in industrial power systems.

Request a quote or submit an inquiry to discuss pricing, availability and how the LQR2G392MSEGBN can be integrated into your power system designs.