LKX2D391MESA25

The LKX2D391MESA25 is a snap-in terminal aluminum electrolytic capacitor from Nichicon’s LKX series, rated at 390 µF and 200 V. It is designed for power applications in audio equipment and switching power supplies where high-temperature stability and acoustic performance are important.

Built as a radial can with snap-in mounting, this part combines a compact 25 × 25 mm footprint with a 105°C operating range and a defined endurance specification for reliable long-term operation under rated ripple and bias conditions.

Key Features

• Capacitance & Voltage — 390 µF capacitance at a 200 V rated voltage with a tolerance of ±20% (–20%~20%).
• High-temperature rating — Rated for operation from –40°C to 105°C, supporting applications requiring elevated ambient tolerance.
• Endurance — Specified lifetime of 2000 hours at 105°C when subjected to D.C. bias plus rated ripple current, meeting LKX series endurance criteria.
• Ripple handling — Rated ripple current of 1.31 A at 120 Hz and 1.965 A at 50 kHz for effective smoothing in power rails and converters.
• Acoustic-focused materials — Selected materials intended to achieve superior acoustic sound, targeting audio equipment performance requirements.
• Package & mounting — Radial, can-style snap-in construction for secure vertical mounting in power assemblies and chassis-mounted power modules.
• Loss characteristics — tan δ 0.15 (measured at 120 Hz, 20°C) per LKX series specifications for this size and rating.
• Compliance — RoHS compliant (2011/65/EU, (EU)2015/863).
• Physical size — Compact 25 × 25 mm (L × D) body footprint for space-conscious power designs.

Typical Applications

• Audio equipment power rails — Provides smoothing and decoupling in audio amplifier and preamplifier power supplies where acoustic performance matters.
• Switching power supplies — Acts as an input/output filter and bulk storage capacitor for SMPS designs operating up to 200 V.
• General-purpose power filtering — Suitable for industrial and consumer electronics requiring polarized bulk capacitance and high-temperature endurance.

Unique Advantages

• Designed for audio fidelity — Materials selected to improve acoustic sound quality, supporting audio-focused power system design goals.
• High-temperature endurance — Rated for operation to 105°C with a 2000-hour endurance specification under rated conditions, helping maintain performance in demanding thermal environments.
• Robust ripple performance — Clear ripple current ratings at both low and high frequencies (1.31 A at 120 Hz; 1.965 A at 50 kHz) for reliable smoothing across application bandwidths.
• Secure snap-in mounting — Radial snap-in can design enables fast, reliable mechanical installation in power assemblies and PCB configurations.
• Compact footprint — 25 × 25 mm body provides substantial capacitance in a space-efficient package for constrained layouts.
• Regulatory compliance — RoHS conformity supports use in designs that require restricted substance compliance.

Why Choose LKX2D391MESA25?

The LKX2D391MESA25 delivers a combination of bulk capacitance, high-voltage rating and high-temperature endurance suited to audio and power supply applications. Its snap-in radial can package and defined ripple current characteristics make it practical for designers needing reliable smoothing and decoupling in compact, thermally challenging assemblies.

As part of Nichicon’s LKX series, this capacitor is intended for engineers and procurement teams seeking a RoHS-compliant, acoustically-considered component that matches the reliability and performance expectations of audio equipment and switching power supply designs.

Request a quote or contact sales to discuss availability, lead times, and pricing for the LKX2D391MESA25 and support your next power-system design.