LASW6271MELB40

The LASW6271MELB40 is a Nichicon snap-in aluminum electrolytic capacitor designed for high-voltage, high-temperature power applications. It delivers 270 µF capacitance at a 420 V rating in a compact snap-in can, optimized for electrical systems that experience voltage fluctuation and elevated operating temperatures.

With a 105°C permissible operating range and engineered safety features for abnormal over-voltage conditions, this component targets general-purpose power filtering, energy storage and smoothing duties where long endurance and elevated ripple capability are required.

Key Features

• Electrical specification: 270 µF capacitance at 420 V DC with polarization and a capacitance tolerance of ±20% (120 Hz, 20°C).
• High-temperature endurance: Rated for operation from −25°C to +105°C and guaranteed to withstand 2000 hours of D.C. bias plus rated ripple current at 105°C.
• Ripple current capability: Rated ripple current of 1.1 A at 120 Hz and 1.265 A at 10 kHz; frequency coefficients for the series (400–420–450 V) include 0.88 at 50 Hz, 0.90 at 60 Hz, 1.00 at 120 Hz, 1.10 at 1 kHz and 1.15 at 10 kHz or more.
• Safety and reliability: Improved safety features for abnormally excessive voltage and a pressure-relief vent designed to operate in normal conditions without flame, ignition or dispersion of case fragments.
• Package and mounting: Snap-in terminal, radial can (snap-in) package for secure board mounting and reliable mechanical retention.
• Environmental compliance: RoHS compliant (2011/65/EU, (EU)2015/863).
• Compact size: Smaller case size relative to the LAQ series, with physical dimensions L: 4 × D: 3 cm for space-constrained designs.

Typical Applications

• Industrial power supplies: Bulk filtering and smoothing in high-voltage AC–DC and DC–DC power supplies where 420 V rating and high ripple handling are required.
• Voltage-fluctuation-prone equipment: Systems operating in environments with unstable line voltage benefit from the capacitor's improved safety features and endurance at elevated temperatures.
• Power conversion modules: Energy storage and ripple suppression in inverters, converters and other power conversion stages that demand long-life capacitors at 105°C.

Unique Advantages

• High-voltage capability: 420 V rating enables use in medium-voltage filtering and storage applications without series stacking.
• Long high-temperature life: 2000-hour endurance at 105°C under rated ripple current improves reliability in hot operating environments.
• Enhanced ripple performance: Measured ripple current ratings at both low and high frequencies plus published frequency coefficients allow confident ripple budgeting across a wide frequency range.
• Built-in safety design: Pressure-relief vent and design provisions for abnormal voltage reduce risk of unsafe failure modes during over-voltage events.
• Space-efficient snap-in package: Smaller case size and snap-in mounting simplify board layout while providing secure mechanical attachment for high-vibration environments.
• Regulatory compliance: RoHS conformity supports environmental and regulatory requirements for modern electronic equipment.

Why Choose LASW6271MELB40?

LASW6271MELB40 positions itself as a robust, compact solution for designers needing a 420 V, 270 µF aluminum electrolytic capacitor capable of sustained operation at 105°C. Its combination of high ripple capability, long endurance under rated conditions and enhanced safety features makes it well suited to power supplies, converters and systems subjected to voltage fluctuations.

For engineering teams focused on reliability and predictable end-of-life performance, this Nichicon snap-in capacitor provides verifiable specifications for capacitance tolerance, ripple current, frequency scaling and leakage behavior, while meeting RoHS environmental requirements.

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