LQSW6271MELA40

The LQSW6271MELA40 is a Nichicon LQS-series snap-in aluminum electrolytic capacitor specified for high-voltage power applications. It delivers 270 µF at a 420 V rating in a radial can with snap-in terminals and is designed for high-speed charge–discharge environments.

Typical use cases include high-frequency regenerative voltage circuits for AC servomotors and general inverters, equipment operating in fluctuating-voltage areas, and rectifier circuits such as voltage doublers. The device is RoHS compliant and targeted at industrial power-electronics designs requiring robust high-voltage bulk capacitance.

Key Features

• Rated Performance: 270 µF capacitance at 420 V nominal, polarized design—provides bulk energy storage for high-voltage DC link and regenerative circuits.
• High-temperature endurance: Rated for operation from –25°C to +105°C with an endurance specification of 3000 hours at 105°C under rated bias and ripple.
• High-speed charge–discharge capability: Engineered for high-speed charge–discharge operation; endurance test specified for 50 million charge–discharge cycles (charge–discharge voltage difference = rated voltage + 0.35 V, cycle 6 Hz) at room temperature.
• Ripple current handling: Specified ripple current of 1.25 A at 120 Hz and 1.788 A at 50 kHz, supporting both low- and high-frequency power stages.
• Leakage and dissipation characteristics: Leakage current specified as I ≤ 3√(C·V) µA after 5 minutes at 20°C; tangent of loss angle (tan δ) max for 420 V is 0.15 (measured at 120 Hz, 20°C).
• Practical mounting: Snap-in terminal, radial can package for secure board mounting and mechanical stability in power assemblies.
• Regulatory compliance: RoHS compliant (2011/65/EU, (EU)2015/863).

Typical Applications

• Industrial motor drives: Bulk DC-link and regenerative energy buffering for AC servomotor controllers and drive inverters.
• General inverters: Energy storage and smoothing in inverter front-ends where high-voltage, high-frequency charge–discharge behavior is required.
• Voltage-doubler rectifier circuits: Suitable for rectifier and voltage-doubler designs that demand stable high-voltage capacitance.
• Equipment in fluctuating-voltage environments: Provides resilience to supply variations and transient events in industrial power systems.

Unique Advantages

• High-voltage capability: 420 V rating enables use in high-voltage DC-link and regenerative circuits without series stacking.
• Designed for long-term thermal stress: 3000-hour rated life at 105°C supports sustained operation in hot enclosures and demanding industrial conditions.
• Proven charge–discharge robustness: Endurance validated to 50 million charge–discharge cycles (rated voltage + 0.35 V, 6 Hz), demonstrating stability under repetitive regenerative loads.
• Broad ripple performance: Specified ripple currents at both 120 Hz and 50 kHz make the part suitable across mains-frequency and high-frequency converter topologies.
• Ease of board integration: Snap-in radial can package provides a secure mechanical connection for high-vibration or high-current assemblies.
• Regulatory readiness: RoHS compliance supports deployment in regions requiring restricted-substance conformity.

Why Choose LQSW6271MELA40?

The LQSW6271MELA40 combines a high 420 V rating with 270 µF capacitance and snap-in packaging to address demanding power-electronics tasks where rapid charge–discharge cycles and elevated operating temperatures are common. Its specified ripple performance and defined endurance make it suitable for designers building industrial drives, inverter systems, and rectifier circuits that require reliable high-voltage bulk capacitance.

As part of Nichicon’s LQS series, this capacitor offers verifiable electrical and endurance characteristics—leakage current limits, tan δ specification, and long-term life at 105°C—providing predictable behavior for engineering qualification and sustained field operation.

Request a quote or submit a parts inquiry for LQSW6271MELA40 to receive pricing, lead time, and availability details for your next power-electronics design.