LAKW6271MELC40

The LAKW6271MELC40 is a Nichicon LAK series aluminum electrolytic capacitor in a radial, snap‑in can package. It is a polarized, high‑voltage capacitor rated 420 V with 270 µF nominal capacitance and ±20% tolerance, designed for general‑purpose use where voltage fluctuations and elevated operating temperatures occur.

This part is specified for operation from −25°C to 105°C and is designed to withstand 2000 hours application of rated ripple current at 105°C. It includes improved safety measures for abnormally excessive voltage and is RoHS compliant.

Key Features

• High Voltage Rating: Rated voltage of 420 V and part of the LAK series offering extended voltage options (200 V, 400 V, 420 V) for high‑voltage applications.
• Nominal Capacitance: 270 µF with ±20% tolerance, suitable for smoothing and bulk energy applications in power circuits.
• High‑Temperature Endurance: Operating temperature range −25°C to 105°C with a specified endurance of 2000 hours at 105°C under rated ripple current.
• Snap‑In Radial Can Package: Snap‑in terminal mounting for secure PCB or chassis installation in power assemblies.
• Ripple Current Ratings: Specified ripple current of 1.1 A at 120 Hz and 1.265 A at 10 kHz, supporting AC ripple handling across common power frequencies.
• Leakage Current Specification: Leakage current limited to I ≤ 3√CV (µA) after 5 minutes at 20°C, as defined in the series datasheet.
• Safety and Pressure Relief: Improved safety features for abnormal over‑voltage conditions and a pressure relief vent designed to operate without dangerous failure modes under test conditions listed in the LAK series documentation.
• RoHS Compliant: Conforms to RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• Industrial Power Supplies: Bulk filtering and ripple suppression in power supplies operating in environments with fluctuating line voltages.
• Power Conversion Modules: DC link or smoothing capacitor for high‑voltage converters and related power electronics requiring 420 V capability and high‑temperature endurance.
• Backup and UPS Systems: Energy smoothing and decoupling in uninterruptible power and backup systems exposed to elevated temperatures.
• General‑Purpose High‑Voltage Equipment: Replacement or design‑in for equipment requiring a high‑voltage, high‑temperature aluminum electrolytic capacitor with snap‑in mounting.

Unique Advantages

• Extended Voltage Capability: 420 V rating provides headroom for high‑voltage filtering and bulk energy storage in demanding power designs.
• Validated High‑Temperature Life: Endurance tested for 2000 hours at 105°C with rated ripple current, giving predictable behavior in hot enclosures.
• Snap‑In Mechanical Reliability: Radial, snap‑in can packaging enables robust mounting for power assemblies where secure mechanical connection is critical.
• Measured Ripple Performance: Published ripple current values at 120 Hz and 10 kHz help engineers size capacitors to meet AC ripple requirements across frequencies.
• Defined Leakage and Loss Limits: Leakage current and tan δ limits are specified in the series documentation, supporting predictable circuit performance after initial voltage application.
• Safety‑Focused Design: Improved safety features and pressure relief behavior reduce the risk of hazardous failure under abnormal voltage conditions.

Why Choose LAKW6271MELC40?

The LAKW6271MELC40 offers a combination of high voltage rating (420 V), sizable capacitance (270 µF), and durable thermal endurance up to 105°C, making it suitable for power designs that face voltage fluctuation and elevated operating temperatures. Its snap‑in radial can package simplifies installation in power assemblies while delivering defined ripple and leakage characteristics for predictable circuit behavior.

As part of Nichicon’s LAK series, this capacitor is positioned for engineers and procurement teams seeking a RoHS‑compliant, safety‑aware aluminum electrolytic solution for general‑purpose high‑voltage power applications.

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