LGNW6391MELB40

The LGNW6391MELB40 is a 390 µF, 420 V aluminum electrolytic capacitor in Nichicon’s LGN series. It is a snap‑in terminal, radial can device designed for general purpose electronic equipment where high voltage, elevated temperature endurance and compact packaging are required.

Built to withstand 3000 hours of rated ripple current at 105°C and compliant with RoHS (2011/65/EU, (EU)2015/863), this part delivers verified high‑temperature endurance and consistent electrical performance in demanding environments.

Key Features

• Rated Capacitance and Voltage — 390 µF nominal capacitance at a rated voltage of 420 V provides bulk energy storage for high‑voltage circuits.
• High‑Temperature Endurance — Specified to endure 3000 hours of rated ripple current at 105°C, ensuring stability under prolonged elevated temperature operation.
• Ripple Current Performance — Ripple capability specified as 1.61 A at 120 Hz and 2.302 A at 100 kHz, supporting both low‑ and high‑frequency ripple suppression requirements.
• Operating Temperature Range — Rated for operation from −25 °C to +105 °C, matching the 350–600 V category temperature specification for this voltage class.
• Compact Snap‑In Package — Radial, can‑style snap‑in mounting simplifies installation and provides a space‑efficient footprint (size approximately L: 4 × D: 3 cm).
• Capacitance Tolerance — ±20% tolerance at 120 Hz, 20 °C for predictable circuit behavior.
• RoHS Compliant — Meets RoHS directive (2011/65/EU, (EU)2015/863) for restricted substances.

Typical Applications

• General Purpose Electronic Equipment — Bulk energy storage and smoothing in high‑voltage circuits where a 420 V, 390 µF capacitor is required.
• High‑Temperature Power Systems — Suitable for applications that demand sustained ripple handling and endurance at elevated ambient temperatures up to 105 °C.
• Snap‑In Radial Mount Designs — For assemblies that use snap‑in cans to simplify insertion and secure mounting on power boards or modules.

Unique Advantages

• Proven High‑Temperature Endurance: 3000 hours at 105 °C under rated ripple current provides long‑term stability in hot operating conditions.
• High Voltage Capability: 420 V rating supports higher‑voltage power rails without the need for series stacking.
• Clear Ripple Specifications: Published ripple current values at 120 Hz and 100 kHz let designers size cooling and ripple margins accurately.
• Space‑Efficient Packaging: Snap‑in radial can format and a compact L × D footprint (≈ 4 × 3 cm) reduce board area compared with larger case options.
• Manufacturing‑Friendly Mounting: Snap‑in terminals enable reliable mechanical retention for automated or manual assembly processes.
• Regulatory Alignment: RoHS compliance supports environmental requirements for modern electronics production.

Why Choose LGNW6391MELB40?

The LGNW6391MELB40 combines a high 420 V rating with a 390 µF capacitance in a compact snap‑in aluminum electrolytic package engineered for sustained operation at up to 105 °C. Its defined ripple current performance and extended endurance make it suitable for designers needing predictable, long‑term smoothing and energy storage in high‑voltage, high‑temperature assemblies.

This part is well suited for teams designing robust industrial and power electronics where verified endurance, clear electrical limits, and a compact snap‑in form factor reduce integration risk and simplify BOM decisions. Backed by Nichicon’s LGN series specifications, it offers measured performance and regulatory compliance for production designs.

To request a quote or submit a component inquiry for the LGNW6391MELB40, please reach out to sales or quoting channels with your part quantity and delivery requirements.