LGX2W391MELB50

The LGX2W391MELB50 is a snap‑in terminal aluminum electrolytic capacitor from Nichicon’s LGX series, rated 390 µF at 450 V. It is designed for high‑temperature, long‑life power applications and is RoHS compliant.

Engineered for rectifier circuits in general inverters and switching power supplies, this radial can (snap‑in) capacitor delivers sustained performance at elevated temperatures with proven endurance under rated ripple current conditions.

Key Features

• Capacitance & Voltage — 390 µF capacitance at a rated voltage of 450 V, with a capacitance tolerance of ±20% (120 Hz, 20°C).
• High‑temperature, Long Life — Endurance specified as 5000 hours at 105°C with DC bias plus rated ripple current; after test, capacitance change within ±20% and leakage current remains within initial specification.
• Operating Temperature Range — Specified for operation from −25°C to +105°C for broad thermal margin in industrial power systems.
• Ripple Current Capability — Rated ripple current of 1.67 A at 120 Hz and 2.388 A at 50 kHz, supporting smoothing and filtering in high‑stress power rails.
• Snap‑In Radial Can Package — Snap‑in terminal mounting for secure board fixation in power assemblies; package case listed as radial, can – snap‑in.
• Leakage and Dissipation Characteristics — Leakage current conforms to I ≤ 3√(C·V) after 5 minutes’ application of rated voltage (20°C); tan δ (loss tangent) maximum for 450 V class is 0.20 (120 Hz, 20°C).
• Low‑temperature Stability — Impedance ratio Z(−25°C)/Z(+20°C) for the 400–500 V range specified up to 8, ensuring predictable behavior in cooler environments.
• Polarized Device — Polarized electrolytic construction for DC filtering and energy storage applications.
• Dimensions — Physical size dimension listed as L: 5 × D: 3 cm and a maximum seated height of 1.969 inches for board layout considerations.

Typical Applications

• Inverter Rectifier Circuits — Used on rectifier stages to smooth DC and handle sustained ripple current in general inverter systems.
• Switching Power Supplies — Provides bulk filtering and energy storage for high‑voltage switch‑mode power supplies operating up to 450 V.
• Industrial Power Electronics — Suitable for power supply filtering and DC link applications where long life at elevated temperature is required.

Unique Advantages

• Designed for long service at high temperature: 5000‑hour endurance at 105°C under rated ripple current provides predictable lifetime in demanding thermal environments.
• High voltage capability: 450 V rating supports high‑voltage rail designs without requiring series stacking of lower‑voltage parts.
• Robust ripple handling: Specified ripple current values at both low and high frequency (1.67 A at 120 Hz, 2.388 A at 50 kHz) help reduce thermal stress and improve reliability in power circuits.
• Practical snap‑in mounting: Snap‑in terminals offer secure mechanical retention for power PCBs and simplify assembly in high‑vibration environments.
• Predictable electrical stability: Leakage current, tan δ, and impedance‑vs‑temperature characteristics are specified to aid design verification and thermal management.
• RoHS compliant: Meets RoHS directive requirements for restricted substances, supporting regulatory adherence in finished products.

Why Choose LGX2W391MELB50?

The LGX2W391MELB50 combines high‑voltage capability and a snap‑in radial can package with a long‑life, high‑temperature specification. Its 390 µF/450 V rating, defined ripple current performance, and 5000‑hour endurance at 105°C make it well suited to engineers designing rectifier stages, DC link filters, and switching power supplies where sustained thermal and electrical stress are expected.

This part is appropriate for design teams seeking a proven electrolytic solution with clear electrical and thermal specifications, RoHS compliance, and snap‑in mounting for reliable board installation and serviceability.

Request a quote or contact sales to discuss availability, lead times, and pricing for the LGX2W391MELB50.