LAK2D391MELB25

The LAK2D391MELB25 is a snap-in terminal aluminum electrolytic capacitor from Nichicon’s LAK series, specified for 390 µF capacitance at a 200 V rating. It is a radial can, snap-in package designed for general-purpose applications and equipment operating in environments with fluctuating voltage.

Engineered for high-temperature endurance, this capacitor is rated for operation from -25°C to +105°C and is specified to withstand 2000 hours of rated ripple current at 105°C, delivering reliable performance where sustained ripple and elevated ambient temperatures are expected.

Key Features

• Electrical Specification — 390 µF nominal capacitance with a rated voltage of 200 V and capacitance tolerance of ±20% at 120 Hz, 20°C.
• High-temperature Endurance — Rated for operation up to 105°C and specified to tolerate 2000 hours of D.C. bias plus rated ripple current at 105°C with defined limits on capacitance change, tan δ, and leakage current.
• Ripple Current Capability — Specified ripple current of 1.2 A at 120 Hz and 1.44 A at 10 kHz, suitable for applications where AC ripple is present on a DC bus.
• Mounting and Package — Snap-in terminal, radial can package for secure board mounting in through-hole assemblies.
• Safety Features — Improved safety measures for abnormally excessive voltage and a pressure-relief vent designed to operate without dangerous conditions such as flames or case dispersion.
• Environmental Compliance — Compliant with RoHS directives (2011/65/EU, (EU)2015/863).
• Polarized — Polarized electrolytic capacitor suitable for DC applications requiring polarity-aware components.
• Compact Dimensions — Radial can dimensions: L: 2.5 × D: 3 cm (length × diameter), suitable for space-conscious through-hole layouts.

Typical Applications

• General-purpose power electronics — Bulk capacitance for smoothing and energy reservoir tasks in DC circuits where general-purpose capacitors are specified.
• Equipment in fluctuating-voltage environments — Designed for use in systems exposed to voltage variation, leveraging improved safety features for abnormal voltage conditions.
• Snap-in PCB assemblies — Through-hole snap-in terminal package enables secure mechanical retention for assemblies subjected to vibration or handling.
• High-temperature installations — Applications requiring sustained operation at elevated temperatures up to 105°C with extended ripple endurance.

Unique Advantages

• High-temperature ripple endurance: Specified to withstand 2000 hours of rated ripple current at 105°C, providing predictable long-term behavior under thermal stress.
• Robust ripple handling: Rated ripple currents of 1.2 A (120 Hz) and 1.44 A (10 kHz) help manage AC components on DC rails in demanding circuits.
• Enhanced safety design: Improved protection against abnormally excessive voltage and a pressure-relief vent reduce the risk of hazardous failure modes.
• Snap-in mounting for secure retention: Radial, snap-in can simplifies installation on through-hole PCBs and helps maintain mechanical stability.
• Regulatory compliance: RoHS conformity supports designs targeting regulated markets and reduces materials compliance overhead.
• Clear specification set: Manufacturer-backed parameters (capacitance, voltage, temperature range, ripple endurance) enable straightforward selection and verification during design reviews.

Why Choose LAK2D391MELB25?

LAK2D391MELB25 combines a 390 µF capacitance and 200 V rating in a snap-in aluminum electrolytic package designed for reliable performance at elevated temperatures. Its endurance specification—2000 hours at 105°C under rated ripple current—along with dedicated safety features makes it well suited for general-purpose power electronics and equipment exposed to supply fluctuations.

Manufactured by Nichicon as part of the LAK series, this component provides clear, verifiable electrical and mechanical specifications for engineers and procurement teams requiring robust, RoHS-compliant capacitors for through-hole assemblies.

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