LQS2G221MELZ45

The LQS2G221MELZ45 is a 220 µF, 400 V aluminum electrolytic capacitor in a snap-in radial can designed for high-speed charge–discharge applications. Built to operate from −25°C to +105°C and qualified for sustained operation at elevated temperatures, it targets power-electronics systems that require robust energy buffering under fluctuating voltages.

Typical use cases include high-frequency regenerative voltage environments such as AC servomotors and inverters, rectifier/voltage-doubler circuits, and general-purpose industrial power electronics where a polarized, high-voltage bulk capacitor is required.

Key Features

• High-voltage, high-capacitance: 220 µF rated at 400 V for bulk energy storage in mid/high-voltage power rails.
• Snap-in radial can package: Snap-in terminals and radial can construction for secure PCB mounting and robust mechanical retention.
• High-temperature operation: Rated for continuous operation from −25°C to +105°C with a specified endurance of 3000 hours at 105°C under D.C. bias plus rated ripple current.
• High-speed charge–discharge capability: Designed for high-speed charge–discharge duty and tested for charge–discharge endurance up to 50 million cycles under specified conditions.
• High-frequency ripple handling: Ripple current ratings of 1.1 A at 120 Hz and 1.573 A at 50 kHz, supporting both mains-frequency and high-frequency inverter/regenerative applications.
• Polarized design with controlled electrical loss: Polarized capacitor with tan δ specified (0.15 max. at 400 V, 120 Hz) and leakage current limited per the datasheet formula I ≤ 3√(C·V).
• RoHS compliant: Conforms to RoHS directive requirements.

Typical Applications

• AC servo drives: Energy absorption and regenerative voltage smoothing in servo and motion-control systems.
• Inverters and motor drives: Bulk DC-link and buffering for general inverter topologies operating with fluctuating supply voltages.
• Rectifier / voltage-doubler circuits: Use as the rectifier smoothing capacitor in voltage-doubler and high-voltage rectifier stages.
• Industrial power electronics: General-purpose energy storage where polarized high-voltage capacitors are required and elevated temperature endurance is needed.

Unique Advantages

• 400 V rating with substantial capacitance: Provides significant energy storage for DC-link and smoothing duties without resorting to parallel arrays of smaller capacitors.
• Designed for charge–discharge endurance: Series-tested for long charge–discharge cycling (50 million cycles at defined conditions), making it suitable for repetitive regenerative and pulsed-power applications.
• High-temperature reliability: 3000-hour endurance at 105°C under rated stress conditions supports prolonged operation in hot industrial environments.
• High-frequency ripple capability: Specified ripple ratings at 120 Hz and 50 kHz allow designers to size for both low- and high-frequency ripple content in power converters.
• Secure snap-in mounting: Snap-in terminals simplify board assembly and provide mechanical robustness in vibration-prone installations.
• RoHS compliance: Meets contemporary environmental directive requirements for restricted substances.

Why Choose LQS2G221MELZ45?

The LQS2G221MELZ45 combines high-voltage capability, substantial capacitance, and a snap-in radial package engineered for demanding power-electronics environments. Its high-temperature rating, specified endurance at 105°C, and validated charge–discharge behavior make it suitable for designs that require reliable energy buffering under fluctuating voltages and high-frequency regenerative events.

Choose this capacitor for industrial inverter, servo drive, and rectifier applications where long-term thermal endurance, high-frequency ripple handling, and a secure PCB mounting solution are priorities.

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