LKX2G121MESA25

The LKX2G121MESA25 is a snap‑in aluminum electrolytic capacitor designed for audio equipment and switching power supply applications. It delivers 120 µF at a 400 V rating in a compact φ25 × 25 mm can with snap‑in terminals for secure board mounting.

Engineered for elevated operating conditions, this RoHS‑compliant part is specified for operation from −25°C to +105°C with an endurance rating of 2000 hours at 105°C, making it suitable where stability and long‑term reliability under heat are required.

Key Features

• Capacitance & Voltage — 120 µF rated capacitance at 400 V, with a capacitance tolerance of ±20%.
• High‑Temperature Endurance — Rated lifetime of 2000 hours at 105°C (endurance tested under rated DC bias plus ripple current).
• Low Loss (tan δ) — tanδ specified at 0.15 (measurement context per datasheet: 120 Hz, 20°C), supporting stable performance in audio and power circuits.
• Ripple Current Capability — Low frequency ripple current 0.73 A (730 mA at 120 Hz) and high frequency ripple current 1.044 A at 50 kHz to support filtering in supply rails and decoupling duties.
• Leakage Current — Specified leakage current of 650 µA.
• Mounting & Package — Snap‑in radial can (φ25 × 25 mm) for robust, low‑profile board installation; supplied in tray packing for production use.
• Polarized — Suitable for DC filter and energy storage roles where polarity is defined.
• Regulatory — RoHS compliant.

Typical Applications

• Audio Equipment — Bulk filtering and power smoothing in audio power supplies where low loss and stable capacitance support sound quality.
• Switching Power Supplies — Output filtering and energy storage for high‑voltage rails, leveraging the 400 V rating and robust ripple current handling.
• General Purpose Power Systems — DC bus smoothing and decoupling in industrial and commercial power electronics that operate up to 105°C.

Unique Advantages

• High‑voltage capability: 400 V rating enables use on higher DC rails without series stacking, simplifying board design.
• Compact can size: φ25 × 25 mm footprint provides high capacitance in a space‑efficient package for constrained layouts.
• Designed for elevated temps: 2000 h endurance at 105°C offers predictable performance in high‑temperature operating environments.
• Frequency‑range ripple support: Specified ripple current at both low and high frequencies (120 Hz and 50 kHz) helps assure reliable filtering across switching and line frequencies.
• Production ready packaging: Tray packing suited for automated assembly and consistent handling during manufacturing.

Why Choose LKX2G121MESA25?

The LKX2G121MESA25 combines a high 400 V rating with 120 µF capacitance in a compact snap‑in aluminum can engineered for audio and switching power supply applications. Its specified low loss (tanδ 0.15), defined leakage (650 µA), and ripple current figures provide measurable performance parameters for design validation and reliability planning.

This part is positioned for engineers and purchasers seeking a RoHS‑compliant, production‑ready electrolytic capacitor that balances high‑voltage capability, thermal endurance, and straightforward snap‑in mounting for power and audio electronics.

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