LQS2G391MELA50

The LQS2G391MELA50 is a Nichicon LQS series snap-in aluminum electrolytic capacitor specified for high-speed charge–discharge applications. It is a polarized, snap-in terminal can designed for power-electronics environments that require high voltage handling and elevated operating temperature.

Engineered for AC servomotor regenerative circuits, general inverters and rectifier/voltage-doubler circuits, this capacitor delivers 390 µF at 400 V with rated operation up to 105°C and RoHS compliance.

Key Features

• Capacitance & Voltage — 390 µF nominal capacitance at a rated voltage of 400 V; capacitance tolerance is −20% to +20%.
• High-temperature operation — Rated for operation from −25°C to +105°C to support elevated-temperature power-electronics environments.
• High-speed charge–discharge design — Part of the LQS series specified for high speed charge–discharge behavior and suitability for high-frequency regenerative voltages.
• Endurance — Specified endurance of 3000 hours at 105°C under DC bias plus rated ripple current.
• Ripple current capability — Rated ripple current of 1.55 A at 120 Hz and 2.216 A at 50 kHz, suitable for both low- and high-frequency applications.
• Mounting & package — Snap-in terminal, radial can (snap-in) package for mechanical stability and straightforward board or chassis installation; size dimension listed as L: 5 × D: 2.5 cm with a seated height max of 1.969 inch.
• Polarized — Polar capacitor construction for DC bias applications.
• Environmental compliance — RoHS compliant (2011/65/EU, (EU)2015/863).

Typical Applications

• AC servomotor regenerative circuits — Handles high-frequency regenerative voltages and fast charge–discharge cycles common in servo drives.
• General inverter systems — Supports DC-bus smoothing and energy recovery functions in inverter topologies operating at elevated temperatures.
• Voltage-doubler rectifier circuits — Suitable for rectifier stages that use voltage-doubler arrangements where high voltage ratings and reliable ripple handling are required.
• Equipment in voltage-fluctuating environments — Designed to tolerate fluctuating system voltages while maintaining capacitance and leakage characteristics over long endurance periods.

Unique Advantages

• Designed for high-frequency regenerative loads: Specified for high-speed charge–discharge operation, making it appropriate for servo and inverter regenerative energy flows.
• High voltage margin: 400 V rating accommodates demanding DC-bus and rectifier applications.
• Temperature resilience: −25°C to +105°C operating range and 3000-hour endurance at 105°C provide stability in hot power-electronics environments.
• Dual-frequency ripple capability: Ripple current ratings at both 120 Hz and 50 kHz support a range of switching and line-frequency conditions.
• Robust snap-in packaging: Radial snap-in can simplifies mechanical installation and retention in power assemblies.
• Regulatory compliance: RoHS compliance supports restriction-of-hazardous-substances requirements.

Why Choose LQS2G391MELA50?

The LQS2G391MELA50 combines a high 400 V rating, substantial 390 µF capacitance and a design optimized for high-speed charge–discharge behavior in a snap-in aluminum electrolytic package. Its temperature rating to 105°C and 3000-hour endurance make it suitable for power-electronics designs that demand thermal reliability and sustained ripple handling.

This capacitor is well suited for engineers building inverter drives, servo power stages and rectifier circuits in equipment exposed to voltage fluctuations. As part of Nichicon’s LQS series, it provides clearly specified electrical and mechanical parameters to simplify component selection and system-level reliability assessments.

Request a quote or contact sales to discuss availability, lead times and volume pricing for the LQS2G391MELA50.