LQS2G221MELB25

The LQS2G221MELB25 is a snap-in terminal aluminum electrolytic capacitor from Nichicon’s LQS series, rated 220 µF at 400 V. Engineered for high-speed charge–discharge performance and high-frequency regenerative environments, it targets power conversion and inverter applications that experience fluctuating voltages.

Its design delivers robust ripple handling and long-term endurance for industrial power electronics, making it suitable for general-purpose power systems where reliable energy storage and discharge are required.

Key Features

• Capacitance & Voltage — 220 µF nominal capacitance at a rated voltage of 400 V with ±20% tolerance (–20% ~ 20%).
• High-temperature operation — Rated for continuous operation from –25 °C to +105 °C, suited to demanding thermal environments.
• High-speed charge–discharge — Designed for rapid charge–discharge cycles; series-level endurance testing covers 50 million cycles under specified charge–discharge conditions.
• Ripple current performance — Specified ripple current of 1.1 A at 120 Hz and 1.573 A at 50 kHz, supporting both low- and high-frequency power applications.
• Endurance & lifetime — Endurance specification includes 3000 hours at 105 °C under rated conditions, with capacitance, tan δ and leakage current limits defined by the datasheet.
• Leakage and dissipation — Leakage current conforms to I ≤ 3√(C·V) µA after 5 minutes at 20 °C; tangent of loss angle (tan δ) max. 0.15 at 400 V (measured at 120 Hz, 20 °C).
• Mounting & package — Snap-in terminal, radial can package for secure PCB mounting in power assemblies.
• Regulatory — Compliant with RoHS (2011/65/EU, (EU)2015/863).

Typical Applications

• AC servo drives and inverters — Handles high-frequency regenerative voltages and rapid charge–discharge cycles common in motor control systems.
• General inverters and power converters — Provides stable energy storage and ripple handling in inverter DC-link and smoothing stages.
• Voltage-doubler rectifier circuits — Suitable for rectifier topologies such as voltage doublers where robust voltage fluctuation tolerance is required.
• Industrial equipment in fluctuating-voltage areas — Designed for systems exposed to variable input conditions where long endurance and temperature tolerance are needed.

Unique Advantages

• Designed for rapid cycling: Endurance testing and charge–discharge specifications support applications requiring frequent high-speed energy transfer.
• High-temperature reliability: 105 °C rated operation and a 3000-hour endurance at that temperature provide predictable long-term performance in hot environments.
• Wide ripple-frequency capability: Specified ripple current at both 120 Hz and 50 kHz enables use across low- and high-frequency power stages.
• Robust leakage and loss characteristics: Defined leakage current formula and tan δ limits at rated voltage ensure measurable electrical stability after formation and during service.
• Snap-in mounting for power assemblies: Snap-in terminals simplify secure installation into high-current power PCBs common in industrial systems.
• RoHS compliant: Meets current RoHS directives for environmental and material compliance.

Why Choose LQS2G221MELB25?

The LQS2G221MELB25 combines a 400 V rating with 220 µF capacitance in a snap-in aluminum electrolytic package tailored for high-speed charge–discharge and fluctuating-voltage environments. Its specified ripple current performance at multiple frequencies, proven endurance at elevated temperature, and controlled leakage and dissipation characteristics make it a pragmatic choice for engineers designing inverters, servo drives, and industrial power systems.

This part is suited for designers seeking a robust, series-backed capacitor with clear electrical limits and lifecycle data—ideal for applications that require predictable behavior under frequent cycling and thermal stress.

Request a quote or contact sales to discuss volume pricing, availability, or to request additional technical information for integrating the LQS2G221MELB25 into your design.