LKX2W121MESY45

The LKX2W121MESY45 is a snap‑in aluminum electrolytic capacitor designed for use in switching power supplies for audio equipment. It delivers a 120 µF capacitance at a 450 V rating in a radial, can-type snap‑in package suited for secure PCB mounting.

Built from selected materials aimed at superior acoustic performance, this RoHS‑compliant capacitor targets designers who need high‑voltage filtering with 105°C temperature capability and defined long‑term endurance for reliable operation in audio power systems.

Key Features

• Capacitance & Voltage — 120 µF nominal capacitance with a 450 V rated voltage; capacitance tolerance ±20% (–20% to +20%).
• Package & Mounting — Radial, can-type snap‑in package for secure snap‑in PCB mounting in power supply assemblies.
• Temperature & Endurance — Operating temperature range −25°C to +105°C with an endurance rating of 2000 hours at 105°C under rated bias and ripple conditions.
• Ripple Current Performance — Rated ripple current of 720 mA at 120 Hz and 1.03 A at 50 kHz, suitable for filtering and decoupling in switching supplies.
• Polarization — Polar terminal configuration for DC power applications.
• Acoustic‑Focused Materials — Manufactured with selected materials intended to support superior acoustic sound in audio equipment applications.
• Environmental Compliance — Compliant with the RoHS directive (2011/65/EU,(EU)2015/863).
• Leakage Current Specification — Meets the datasheet leakage current criterion I ≤ 3√3V (µA) after 5 minutes at 20°C when rated voltage is applied.

Typical Applications

• Switch‑mode power supplies for audio equipment — High‑voltage smoothing and bulk storage where stable filtering at elevated temperatures is required.
• Audio amplifier power rails — DC link and supply filtering that benefits from materials chosen for acoustic performance.
• General high‑voltage power filtering — Use in industrial or consumer equipment requiring 450 V electrolytic capacitance and snap‑in mounting.

Unique Advantages

• High voltage capability: 450 V rating lets designers use a single capacitor for higher‑voltage DC rails, simplifying BOMs for power stages.
• 105°C endurance: Rated operation to 105°C with 2000 hours endurance at that temperature supports sustained performance in thermally demanding environments.
• Designed for audio quality: Selected materials and construction target improved acoustic characteristics for audio equipment applications.
• Robust ripple handling: Specified ripple currents at 120 Hz and 50 kHz provide quantifiable performance for both low‑ and high‑frequency switching environments.
• Secure snap‑in mounting: Radial, can snap‑in package ensures reliable mechanical retention for power supply assemblies.
• RoHS compliant: Meets current RoHS directives, simplifying regulatory compliance for finished products.

Why Choose LKX2W121MESY45?

The LKX2W121MESY45 combines a high 450 V rating with 120 µF capacitance in a snap‑in radial can tailored for audio switching power supplies where acoustic performance and thermal endurance matter. Its 105°C operating capability and 2000‑hour endurance at that temperature provide quantifiable reliability for designers addressing long‑term performance in compact power rails.

This part is suited to engineers specifying high‑voltage bulk and smoothing capacitors for audio and general‑purpose power systems who require RoHS compliance, secure snap‑in mounting, and explicit ripple/current and leakage specifications from the datasheet.

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