LQS2W331MELB40

The LQS2W331MELB40 from Nichicon is a snap‑in terminal aluminum electrolytic capacitor designed for high‑voltage power electronics. It combines a 330 µF capacitance with a 450 V rated voltage and is built for high‑speed charge/discharge applications.

Engineered for industrial power systems, this capacitor is suited to high‑frequency regenerative voltages and voltage‑fluctuating environments such as AC servomotor drives, general inverters, and rectifier circuits including voltage doubler configurations. It offers elevated temperature performance up to 105°C and RoHS compliance.

Key Features

• Core Construction — Aluminum electrolytic, polarized design providing 330 µF capacitance at a 450 V rating for high‑voltage energy storage.
• High‑Temperature Operation — Rated for operation from –25°C to +105°C, enabling use in demanding thermal environments.
• High‑Speed Charge/Discharge — Designed specifically for high‑speed charge/discharge cycles and high‑frequency regenerative voltages common in inverter and motor drive systems.
• Robust Endurance — Endurance characteristics include meeting specification after 50 million charge/discharge cycles (room temperature test) and 3000 hours at 105°C under DC bias plus rated ripple current.
• Ripple Current Capability — Rated ripple current of 1.38 A at 120 Hz and 1.973 A at 50 kHz to support high‑frequency applications.
• Snap‑In Mounting — Radial can with snap‑in terminals for secure board retention and straightforward assembly in power modules.
• Tolerance and Size — Capacitance tolerance ±20% and compact footprint with dimensions approximately L: 4 × D: 3 cm.
• Environmental Compliance — Compliant with the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• AC Servomotor Drives — Handles high‑frequency regenerative voltages and rapid charge/discharge demands in motor control systems.
• General Inverters — Provides bulk energy storage and ripple handling for inverter DC bus and regenerative loops.
• Voltage‑Doubler Rectifier Circuits — Suited for rectifier stages where fluctuating voltages and charge/discharge cycles are present.
• Equipment in Voltage‑Fluctuating Areas — Designed to tolerate supply variations common in industrial and utility‑connected equipment.

Unique Advantages

• High‑Voltage Capability: 450 V rating supports a wide range of power‑electronic designs that require elevated DC link voltages.
• High‑Temperature Reliability: Specified operation up to 105°C and 3000‑hour endurance at 105°C under rated conditions demonstrate suitability for thermally demanding installations.
• Designed for High‑Frequency Use: Ripple current ratings at both 120 Hz and 50 kHz make it effective for handling switching and regenerative currents in modern drives and inverters.
• Durable Charge‑Discharge Performance: Series‑level testing includes 50 million charge/discharge cycles at room temperature, supporting long operational life in cycling applications.
• Secure Snap‑In Mounting: Radial snap‑in package simplifies mechanical retention and board assembly in power modules and racks.
• Regulatory Compliance: RoHS compliance supports deployment in regions and products requiring restricted‑substance conformance.

Why Choose LQS2W331MELB40?

The LQS2W331MELB40 is positioned for designers of industrial power electronics who need a high‑voltage, high‑temperature electrolytic capacitor with proven charge/discharge endurance. Its combination of 450 V rating, 330 µF capacitance, high ripple current handling, and 105°C temperature capability makes it a practical choice for inverter, servo drive, and rectifier applications where supply voltage fluctuation and regenerative currents are present.

For teams focused on robust, maintenance‑friendly power designs, this capacitor delivers measurable electrical performance and environmental compliance from a recognized manufacturer, supporting longer life cycles and predictable behavior under specified test conditions.

Request a quote or contact sales to discuss availability, lead times, and how the LQS2W331MELB40 can fit into your power‑electronic design requirements.