LQR2G392MSEHBB

The LQR2G392MSEHBB is a screw-terminal aluminum electrolytic capacitor from Nichicon's LQR series, rated at 3900 µF and 400 V. It is a radial can, screw-terminal type designed for high-frequency regenerative voltages and applications exposed to fluctuating supply conditions.

This capacitor is targeted at power electronics applications such as AC servomotor drives and general inverters, offering high ripple-handling capability, robust mounting, and endurance under elevated temperature and charge–discharge cycling.

Key Features

• Capacitance & Voltage — 3900 µF nominal capacitance at a rated voltage of 400 V, with a tolerance of −20% to +20% (measured at 120 Hz, 20°C).
• Package & Mounting — Screw terminal, radial can package (can with screw terminals) for secure electrical connections suitable for high-current bus and power assemblies.
• Operating Temperature — Rated for operation from −25°C to +85°C to support applications with moderate ambient temperature variation.
• Electrical Performance — Equivalent series resistance (ESR) of 150 mΩ at 120 Hz; specified ripple currents of 15.3 A at 120 Hz and 21.42 A at 100 kHz.
• Endurance & Reliability — Endurance specified as 5000 hours at 85°C under DC bias plus rated ripple current. Charge–discharge endurance tested to 20 million cycles (ΔV = rated × 0.3, 3 Hz) at room temperature.
• Leakage Current — After 5 minutes at rated voltage, leakage current is specified as not more than 3√V µA or 5 mA, whichever is smaller (measured at 20°C).
• Low-Temperature Stability — Impedance stability characterized with Z(−25°C)/Z(+20°C) ≤ 8 (rated voltage range 350–450 V in the series specification).
• Dimensions — Compact radial can footprint with body dimensions L: 9 cm × D: 7.62 cm for system layout planning.

Typical Applications

• AC Servomotor Drives — Supports high-frequency regenerative voltages in servo systems where robust energy buffering and high ripple capability are required.
• General Inverters — Suited for inverter DC-link and energy storage sections exposed to fluctuating supply conditions and high ripple current.
• Rectifier / Voltage Doubler Circuits — Designed for use in rectifier circuits including voltage-doubler topologies where sustained DC voltage and charge–discharge endurance are important.
• Equipment in Fluctuating Voltage Environments — Applicable to industrial equipment that experiences supply voltage variations, benefiting from the capacitor's rated voltage and endurance characteristics.

Unique Advantages

• High Ripple-Current Capability: Specified ripple currents of 15.3 A (120 Hz) and 21.42 A (100 kHz) enable reliable operation in high-stress power circuits.
• Robust Screw-Terminal Mounting: Screw terminals provide secure, low-resistance connections for high-current and high-vibration environments.
• Proven Endurance: Rated for 5000 hours at 85°C under DC bias plus rated ripple current, and validated to 20 million charge–discharge cycles, supporting long service life in cyclic applications.
• Low ESR: 150 mΩ ESR at 120 Hz helps reduce conduction losses and supports stable DC-link performance.
• Leakage Controlled: Leakage current limited to datasheet criteria (≤ 3√V µA or 5 mA after 5 minutes at 20°C), aiding predictable power-up behavior and thermal performance.
• Wide Operational Envelope: −25°C to +85°C operating range and low-temperature impedance characterization allow deployment across a range of industrial environments.

Why Choose LQR2G392MSEHBB?

The LQR2G392MSEHBB is positioned for engineers designing power-conversion systems that need a combination of high capacitance at 400 V, strong ripple-current performance, and mechanical reliability via screw terminals. Its endurance and charge–discharge qualifications make it suitable for applications where repeated energy cycling and fluctuating voltages are expected.

Engineers specifying this capacitor will benefit from clearly defined electrical and environmental specifications—ESR, ripple current ratings, leakage limits, and endurance data—allowing predictable integration into inverter, servo, and rectifier designs while leveraging the Nichicon LQR series characteristics.

Request a quote or submit a quotation request for the LQR2G392MSEHBB to discuss pricing, availability, and lead times for your project needs.