LQR2W392MSEJ

The LQR2W392MSEJ is a screw-terminal aluminum electrolytic capacitor from Nichicon’s LQR series, rated at 3900 µF and 450 V. It is designed for high-speed charge–discharge environments and for use where voltage can fluctuate.

Typical use cases include high-frequency regenerative circuits for AC servomotors and general inverters, equipment operating in voltage-fluctuating areas, and rectifier circuits such as voltage doubler topologies. Its specification set focuses on high-voltage DC-link capability, ripple handling, and endurance at elevated temperature.

Key Features

• Capacitance & Voltage — 3.9 mF (3900 µF) nominal capacitance with a 450 V rated voltage.
• Screw Terminal Package — Radial can with screw terminals for secure mechanical and electrical connections; package case described as radial, can − screw terminals with dimensions L: 9 × D: 9 cm.
• Operating Temperature — Specified operating range of −25 °C to +85 °C.
• Elevated-Temperature Endurance — Rated for 5000 hours at 85 °C under DC bias plus rated ripple current with defined post-test limits (capacitance within ±20%, tan δ ≤ 300% of initial, leakage ≤ initial specified value).
• High-Speed Charge–Discharge & Ripple Handling — Ripple current specified at 13.6 A (120 Hz) and 19.04 A (10 kHz), supporting high-frequency regenerative applications.
• Leakage Current Specification — After 5 minutes’ application of rated voltage, leakage current is not more than 3√V (µA) or 5 mA, whichever is smaller (at 20 °C), per datasheet definition.
• Low-Temperature Stability — Impedance stability characterized with Z(−25 °C)/Z(+20 °C) ≤ 8.
• Charge–Discharge Durability — Endurance tested for 20 million charge–discharge cycles (ΔV = rated voltage × 0.3, cycle 3 Hz) at room temperature with specified capacitance, tan δ and leakage retention.
• Regulatory Compliance — Compliant to the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• AC Servo Drives & Regenerative Systems — Energy buffering and smoothing for high-frequency regenerative voltages in motor drives.
• General Inverters — DC-link and smoothing capacitor in inverter topologies exposed to fluctuating supply voltages.
• Rectifier Circuits / Voltage Doublers — Suited for rectifier circuits using voltage doubler configurations where higher DC voltages are present.
• Equipment in Voltage-Fluctuating Areas — Components for systems that must tolerate variable input conditions and regenerative events.

Unique Advantages

• High Voltage Capability: 450 V rating supports DC-link and high-voltage inverter designs without up-rating component count.
• Designed for Regenerative Loads: Specified ripple current at both 120 Hz and 10 kHz enables use in high-frequency charge–discharge and regenerative circuits.
• Durability at Elevated Temperature: 5000-hour endurance at 85 °C with defined limits for capacitance, dissipation factor and leakage current preserves long-term performance under stress.
• Screw-Terminal Connectivity: Robust screw-terminal package facilitates secure, low-resistance connections for high-current DC-link applications.
• Validated Charge–Discharge Endurance: Tested for 20 million cycles at defined ΔV and frequency, supporting designs with frequent charge–discharge events.
• RoHS-Compliant: Meets RoHS directives for environmental and regulatory requirements.

Why Choose LQR2W392MSEJ?

The LQR2W392MSEJ provides a combination of high-voltage rating, substantial capacitance (3900 µF), and ripple-current capability that addresses the needs of industrial power electronics such as servo drives, inverters and rectifier circuits. Its screw-terminal format and defined endurance and leakage specifications make it a practical choice for engineers designing DC-link and regenerative energy-handling systems.

Engineered within Nichicon’s LQR series specifications, this capacitor targets applications where sustained performance under elevated temperature, frequent charge–discharge cycling, and fluctuating voltages are required. The documented endurance, leakage and impedance characteristics help reduce design uncertainty and support longer in-service life.

Request a quote or submit an inquiry for pricing and availability to receive application-specific support and delivery information for the LQR2W392MSEJ.