LKX2G121MESZ30

The LKX2G121MESZ30 is a snap-in aluminum electrolytic capacitor in Nichicon’s LKX series, specified at 120 µF and 400 V. It is designed for use in audio equipment and switching power supplies where high-voltage bulk capacitance, elevated-temperature endurance and reliable ripple handling are required.

Built to operate up to +105°C (category specification for 400 V parts), this radial, can-type snap-in capacitor combines a compact φ22 × 30 mm envelope with RoHS compliance for use in general-purpose and audio-focused power circuits.

Key Features

• Capacitance & Voltage — 120 µF nominal capacitance at a 400 V rated voltage, providing high-voltage bulk energy storage for power rails and filter stages.
• Snap-in Radial Can Package — Snap-in mounting and radial can construction (φ22 × 30 mm) for secure PCB installation in power assemblies.
• High-Temperature Endurance — Endurance rated at 2000 hours at 105°C under D.C. bias plus rated ripple current; suitable for sustained elevated-temperature operation.
• Ripple Current Capability — Rated ripple current of 0.73 A (Arms) at 120 Hz and 1.044 A at 100 kHz, supporting both mains-frequency and high-frequency switching environments.
• Loss Characteristics — Tangent of loss angle (tan δ) of 0.15 (measured at 120 Hz, 20°C), indicating the specified dissipation characteristic for this part.
• Tolerance & Polarization — Capacitance tolerance ±20% and polarized construction for proper use in DC circuits.
• Operating Temperature Range — Specified for −25°C to +105°C (category temperature range for 400 V and 450 V items), matching the endurance rating for high-temperature applications.
• Shelf Life — Shelf life specified as 1000 hours at 105°C with subsequent voltage treatment per JIS C 5101-4, supporting storage and assembly workflows.
• RoHS Compliant — Conforms to RoHS directives for use in regulated assemblies.

Typical Applications

• Audio Equipment — Bulk and smoothing capacitance in audio power supplies; materials and construction are chosen within the LKX series to support audio-focused implementations.
• Switching Power Supplies — Bulk energy storage and output filtering where 400 V rating and high ripple capability are required for switching topologies.
• Industrial Power Electronics — General-purpose high-voltage filtering and decoupling in industrial and bench power systems.

Unique Advantages

• High-voltage capability: 400 V rating allows use in higher-voltage rails and mains-derived power supplies without series stacking.
• Designed for elevated temperatures: 2000-hour endurance at 105°C provides predictable long-term performance in hot operating environments.
• Broad ripple handling: Specified ripple currents at 120 Hz and 100 kHz enable reliable performance across both low- and high-frequency ripple spectra.
• Audio-focused material selection: LKX series materials are selected to support audio equipment applications, aligning part selection with acoustic-sensitive designs.
• Snap-in mounting for robust assembly: Snap-in terminals simplify mechanical retention and board-level installation in power modules and assemblies.
• Regulatory readiness: RoHS compliance supports integration into assemblies requiring hazardous-substance conformity.

Why Choose LKX2G121MESZ30?

The LKX2G121MESZ30 delivers 120 µF of high-voltage capacitance in a compact φ22 × 30 mm snap-in can, combining 400 V rating with endurance tested at 105°C. Its specified ripple current characteristics and controlled tan δ make it appropriate for audio equipment and switching power supply designs that require reliable bulk storage and filtering under sustained thermal stress.

This part is well suited to engineers specifying high-voltage electrolytic bulk capacitors for general-purpose power electronics where predictable long-term performance, RoHS compliance and secure snap-in mounting are priorities. The LKX2G121MESZ30 supports design longevity and straightforward integration into existing power assemblies.

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