LQSW6331MELB35

The LQSW6331MELB35 from Nichicon is an aluminum electrolytic capacitor in a snap‑in terminal radial can designed for high‑speed charge/discharge applications. It provides 330 µF capacitance at a 420 V rating and is built for environments with fluctuating voltage and high‑frequency regenerative pulses.

Part of the LQS series, this capacitor targets industrial power electronics such as inverters and AC servomotor drives where high ripple handling, thermal endurance, and robust charge/discharge behavior are required. It is RoHS compliant.

Key Features

• High Voltage & Capacitance — Rated at 420 V with 330 µF capacitance, suitable for energy buffering and high‑voltage filtering in power circuits.
• Snap‑in Terminal Package — Radial, can‑style snap‑in mounting for secure board retention and straightforward PCB assembly; physical size L: 3.5 × D: 3 cm.
• Wide Operating Temperature — Specified for –25 °C to +105 °C operation to handle elevated ambient conditions.
• High‑speed Charge/Discharge Endurance — Series endurance data covers charge‑discharge behavior for repetitive cycles; designed for equipment exposed to regenerative and fluctuating voltages.
• Thermal Endurance — Rated for 3000 hours at 105 °C under rated conditions per endurance specification.
• Ripple Current Capability — Rated ripple current of 1.42 A at 120 Hz and 2.031 A at 50 kHz for handling AC ripple in power applications.
• Loss and Leakage Characteristics — Tangent of loss angle (tan δ) specified at a maximum of 0.15 for 420 V; leakage current limited by I ≤ 3√(C·V) µA after 5 minutes at 20 °C.
• Regulatory Compliance — Compliant with the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• AC Servo Drives and Inverters — Energy buffering and smoothing for high‑frequency regenerative voltages in motor control systems.
• General Industrial Inverters — Bulk and ripple filtering in inverter DC link circuits exposed to fluctuating supply conditions.
• Voltage Doubler Rectifiers — Use in rectifier circuits where voltage doubler topologies require reliable high‑voltage capacitance.
• Power Electronics Subject to Fluctuating Voltage — Stabilization and charge/discharge cycling where voltage variations and repetitive pulses occur.

Unique Advantages

• High‑voltage energy storage: 420 V rating with 330 µF provides significant stored energy for DC link and filtering use without complex stacking.
• Engineered for repetitive cycling: Series charge/discharge endurance characteristics support designs with frequent regenerative events.
• Robust thermal performance: Operation to 105 °C and 3000‑hour endurance at temperature support sustained use in warm industrial environments.
• Measured ripple handling: Defined ripple current values at both low and high frequency (120 Hz and 50 kHz) let you size for real‑world AC stress.
• Snap‑in mounting for assembly: Snap‑in terminal construction simplifies board insertion and mechanical retention in power assemblies.
• RoHS compliant: Meets RoHS directives for regulatory alignment in many regional markets.

Why Choose LQSW6331MELB35?

The LQSW6331MELB35 combines a high 420 V rating and substantial 330 µF capacitance with a snap‑in package and elevated thermal endurance, making it well suited for industrial power electronics that face regenerative energy, high ripple, and fluctuating voltages. Its defined ripple current, leakage and loss specifications allow engineers to design predictable DC link and filtering stages.

Manufactured by Nichicon as part of the LQS series, this capacitor is aimed at designers of inverters, motor drives, and other high‑frequency power subsystems who require verifiable performance and long‑term thermal endurance in their systems.

Request a quote or contact sales to discuss pricing, availability, and technical details for the LQSW6331MELB35.