LKX2E391MESZ40

The LKX2E391MESZ40 from Nichicon is a snap‑in aluminum electrolytic capacitor designed for general‑purpose power filtering in audio equipment and switching power supplies. Its 390 µF capacitance at 250 V rating, combined with a compact φ22 × 40 mm can and snap‑in mounting, delivers robust ripple handling and thermal endurance for demanding electronic power systems.

Engineered for use across industrial and consumer power applications, this polarized capacitor balances high ripple capability with long life at elevated temperatures, making it suitable for designs that require reliable smoothing and energy storage under continuous load.

Key Features

• Capacitance & Voltage — 390 µF rated capacitance with a 250 V nominal voltage, suitable for mid‑range DC bus and smoothing duties.
• Construction & Mounting — Snap‑in, radial-can package (φ22 × 40 mm) for secure board mounting and efficient assembly in power assemblies.
• Ripple Current Performance — Rated ripple current of 1.3 A at 120 Hz and 1.95 A at 50 kHz, supporting effective AC ripple smoothing across common power‑supply frequencies.
• Temperature Range & Endurance — Operates from −40°C to +105°C with an endurance rating of 2000 hours at 105°C when subjected to DC bias plus rated ripple current.
• Leakage & Tolerance — Specified leakage current of 930 µA and capacitance tolerance of ±20%, enabling predictable performance in power‑management designs.
• Regulatory Compliance — RoHS‑compliant construction for use in equipment requiring restricted substance conformance.

Typical Applications

• Audio Equipment — Provides bulk energy storage and power‑rail smoothing to support stable supply rails for audio amplifiers and signal chains.
• Switching Power Supplies — Used for input/output filtering and energy buffering where high ripple current capability and thermal endurance are required.
• General Power Filtering — Suitable for industrial and consumer power systems needing reliable smoothing and decoupling under continuous load.

Unique Advantages

• High Ripple Capacity: Measured ripple ratings of 1.3 A (120 Hz) and 1.95 A (50 kHz) reduce voltage ripple and improve regulator stability under variable load.
• Wide Operating Temperature: −40°C to +105°C rating ensures operation across common environmental conditions without derating of basic functionality.
• Long High‑Temperature Life: 2000 hours endurance at 105°C under DC bias plus rated ripple current supports long‑term reliability in heat‑stress applications.
• Snap‑in Packaging: Radial snap‑in can simplifies board assembly and provides secure mechanical retention for power modules and chassis‑mounted supplies.
• RoHS Compliance: Meets restricted substance requirements for regulatory conformity in modern electronic products.

Why Choose LKX2E391MESZ40?

The LKX2E391MESZ40 combines a practical capacitance and voltage rating with snap‑in packaging and validated ripple performance to address common power‑filtering needs in audio equipment, switching power supplies, and general power systems. Its specified leakage, tolerance, and elevated‑temperature endurance provide design predictability for engineers targeting reliable, long‑running power rails.

This part is suitable for designers and procurement teams seeking a proven aluminum electrolytic solution from Nichicon that balances ripple handling, thermal durability, and regulatory compliance for volume production environments.

Request a quote or submit an inquiry to receive pricing, availability, and ordering information for the LKX2E391MESZ40. Our team can provide lead‑time and packaging details to support your production planning.