LQS2V391MELB35

The LQS2V391MELB35 is a Nichicon LQS series aluminum electrolytic capacitor in a snap-in, radial can package designed for high-speed charge–discharge environments. It provides 390 µF capacitance at a 350 V rating and is specified for continuous operation up to 105°C.

This part is targeted at power conversion and motor-drive applications where high-frequency regenerative voltages and fluctuating line conditions occur. Key values include high-frequency ripple handling, charge–discharge endurance, and RoHS compliance.

Key Features

• Capacitance & Voltage: 390 µF nominal capacitance with a rated voltage of 350 V, suitable for energy storage and DC link duties in power electronics.
• High-temperature Operation: Rated for operation from –25°C to +105°C, allowing deployment in higher-temperature power assemblies.
• High-speed Charge–Discharge: LQS series design optimized for high-speed charge–discharge behavior, with specific series-level endurance validation under repetitive cycling.
• Charge–Discharge Endurance: Series endurance specification demonstrates capacitance retention within ±20% after extensive cycling (50 million cycles at specified test conditions).
• Long Life at Elevated Temperature: Endurance specified after 3000 hours at 105°C with DC bias plus rated ripple current applied, with limits for capacitance, dissipation factor, and leakage current defined.
• Ripple Current Capability: Rated ripple currents include 1.3 A at 120 Hz and 1.859 A at 50 kHz, supporting both low- and high-frequency ripple environments.
• Package & Mounting: Snap-in terminal, radial can package (approximate size L: 3.5 × D: 3 cm) for secure board mounting in power assemblies.
• Polarized Design & Tolerance: Polar aluminum electrolytic capacitor with capacitance tolerance of –20% to +20%.
• RoHS Compliance: Compliant with the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• AC Servomotor Regenerative Circuits: Suited for handling high-frequency regenerative voltages in AC servomotor systems where rapid charge–discharge cycles occur.
• General Inverters and Drives: Designed for inverter DC link and filtering tasks in general-purpose motor drives and power conversion equipment.
• Voltage-Fluctuating Equipment: Intended for use in systems exposed to line or load voltage fluctuations, helping stabilize DC bus and absorb transient energy.
• Rectifier / Voltage Doubler Circuits: Suitable for rectifier circuits including voltage-doubler topologies, providing energy storage and smoothing in high-voltage sections.

Unique Advantages

• Designed for high-frequency operation: Explicit ripple current ratings at 120 Hz and 50 kHz support both traditional and high-frequency switching applications.
• Validated charge–discharge durability: Series-level testing verifies capacitance retention within ±20% after extensive charge–discharge cycling, supporting longevity in cycling-intensive systems.
• High-temperature endurance: Endurance characterization at 105°C for 3000 hours under DC bias plus rated ripple current supports reliability in demanding thermal environments.
• Snap-in mounting: Snap-in radial can construction provides a robust mechanical and electrical connection suitable for power electronics assemblies.
• Regulatory compliance: RoHS-compliant construction aligns with common environmental and regulatory requirements.

Why Choose LQS2V391MELB35?

The LQS2V391MELB35 combines a high-voltage 350 V rating and substantial 390 µF capacitance in a snap-in aluminum electrolytic package engineered for high-speed charge–discharge and elevated-temperature duty. Its specified ripple current performance and endurance characteristics make it a suitable choice for power conversion, inverter, and regenerative motor-drive designs that require reliable energy buffering under fluctuating voltage and frequent cycling.

Engineers specifying this Nichicon LQS series part will benefit from clear, measurable endurance and ripple-current data to evaluate lifetime and thermal performance for medium- to high-power applications, while maintaining RoHS compliance for broader regulatory alignment.

Request a quote or submit a procurement inquiry to check availability, lead times, and volume pricing for the LQS2V391MELB35.