LAKW6271MELB45

The LAKW6271MELB45 is a snap-in terminal aluminum electrolytic capacitor from Nichicon's LAK series, specified at 270 µF and 420 V. It is designed for general-purpose power applications where high-voltage capability, elevated operating temperature, and enhanced safety under abnormal voltage conditions are required.

Key use cases include power conversion and smoothing in equipment exposed to voltage fluctuations; the part delivers extended voltage range support and endurance performance that helps maintain reliability in demanding power environments.

Key Features

• High Voltage Rating — Rated for 420 V, suitable for high-voltage bulk filtering and smoothing tasks.
• Capacitance and Tolerance — 270 µF nominal capacitance with ±20% tolerance at 120 Hz, 20°C.
• High-Temperature Endurance — Specified operating temperature range of -25°C to +105°C with endurance demonstrating 2000 hours application of rated ripple current at 105°C.
• Ripple Current Performance — Rated ripple current: 1.1 A at 120 Hz and 1.265 A at 10 kHz, supporting AC ripple handling across common power frequencies.
• Safety and Abnormal Voltage Handling — Improved safety features for abnormally excessive voltage; pressure relief vent operation is designed to avoid flames, ignition, or case dispersion under fault conditions.
• Package and Mounting — Radial can, snap-in terminal type for secure chassis or PCB mounting in power assemblies.
• Leakage and Loss Characteristics — Leakage current specified by I ≤ 3√CV (µA) after 5 minutes at 20°C; tangent of loss angle (tan δ) maximum 0.20 at 120 Hz, 20°C.
• Regulatory Compliance — Compliant with RoHS directive (2011/65/EU, (EU)2015/863).
• Size — Size dimension: L: 4.5 × D: 3 cm (as specified for this part).

Typical Applications

• Industrial Power Supplies — Bulk filtering and smoothing for high-voltage AC/DC and DC/DC converters in industrial systems.
• Voltage-Fluctuation-Prone Equipment — Designed for equipment used in areas with fluctuating supply voltage, leveraging enhanced safety features and extended voltage range.
• Power Conversion and Inverters — Energy storage and ripple suppression in power conversion stages where high-voltage capacitors are required.
• UPS and Large-Capacity Filters — Bulk energy smoothing in uninterruptible power supplies and large filter networks operating at elevated temperatures.

Unique Advantages

• 420 V rating for high-voltage designs: Enables use in higher-voltage filter and smoothing circuits without stepping up component count.
• Designed for elevated temperature endurance: 2000 hours at 105°C under rated ripple current helps maintain performance in hot operating environments.
• Measured ripple capability across frequencies: Specified ripple current at both 120 Hz and 10 kHz supports performance across low and high ripple frequency conditions.
• Enhanced safety under abnormal voltages: Improved safety features and a pressure relief vent reduce risk of flame or part dispersion during fault conditions.
• Snap-in radial package: Provides robust mechanical mounting for high-stress power assemblies and simplifies installation compared with loose-lead styles.
• RoHS compliant: Meets current RoHS directives for environmentally conscious designs.

Why Choose LAKW6271MELB45?

The LAKW6271MELB45 positions itself as a reliable, high-voltage electrolytic solution for designers who need robust energy storage and ripple handling at elevated temperatures. With 270 µF capacitance at 420 V, specified endurance at 105°C, and constructive safety features for abnormal voltage events, it addresses common failure modes in demanding power systems.

This part is well suited for engineers developing industrial power supplies, converters, and equipment operating in fluctuating-voltage environments who require verifiable specifications for capacitance, ripple current, temperature endurance, and safety behavior—all delivered by Nichicon's LAK series design.

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