LGX2G391MELB40

The LGX2G391MELB40 is a polarized aluminum electrolytic capacitor in Nichicon's LGX series featuring a snap‑in terminal. It delivers 390 µF capacitance at a 400 V rating and is designed for sustained operation up to 105°C.

Built for power‑electronics use, this long‑life component withstands 5000 hours of rated ripple current at 105°C and is suited to rectifier circuits in general inverters and switching power supplies. It is RoHS compliant.

Key Features

• Capacitance & Voltage: 390 µF rated capacitance at 400 V, suitable for energy storage and smoothing in high‑voltage power circuits.
• High‑Temperature Long Life: Endurance specified at 5000 hours when operated with rated ripple current at 105°C, providing extended service life in elevated temperatures.
• Snap‑In Package & Mounting: Snap‑in terminal type with radial can package for secure board mounting and reliable mechanical retention in power assemblies.
• Ripple Current Capability: Rated ripple current of 1.6 A at 120 Hz (low frequency) and 2.288 A at 50 kHz (high frequency), enabling handling of significant AC stress in rectifier and switching applications.
• Operating Range & Polarization: Polarized capacitor with an operating temperature range from −25°C to +105°C, matching many industrial power environments.
• Electrical Characteristics: Capacitance tolerance ±20% (at 120 Hz, 20°C) and leakage current defined as I ≤ 3√(C·V) µA after 5 minutes at 20°C per datasheet requirements.
• Form Factor: Compact physical dimensions (L: 4 × D: 3 cm) to fit smaller power modules while delivering high voltage and capacitance.
• Environmental Compliance: Compliant with the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• Switching Power Supplies: Energy storage and output filtering where 400 V rating and high ripple current capability improve regulation and lifetime.
• General Inverters: Used in rectifier stages of inverters to smooth DC rails and tolerate elevated operating temperatures.
• Power Conversion Modules: Suitable for board‑level power conversion assemblies that require compact, high‑voltage capacitors with long life.

Unique Advantages

• Designed for Long‑Term High‑Temperature Use: 5000‑hour endurance at 105°C reduces maintenance and replacement frequency in hot operating environments.
• High Voltage + High Capacitance: 400 V rating combined with 390 µF capacitance provides significant stored energy in a compact package for demanding power applications.
• Robust Ripple Handling: Specified ripple current values at both low and high frequencies support rectifier and switching workloads without excessive heating.
• Secure Snap‑In Mounting: Snap‑in terminals deliver reliable mechanical and electrical connections for high‑current board assemblies.
• Datasheet‑Defined Electrical Limits: Leakage current and tan δ limits are specified per the LGX series datasheet, enabling predictable design margins.
• RoHS Compliant: Meets applicable RoHS directives for environmentally constrained designs.

Why Choose LGX2G391MELB40?

LGX2G391MELB40 is positioned for engineers specifying reliable, long‑life capacitors for power electronics where a 400 V rating, substantial capacitance, and elevated temperature endurance are required. As part of Nichicon's LGX series, it pairs clear datasheet performance limits with snap‑in mounting for secure integration into rectifier and switching power topologies.

This part is well suited to designs that demand predictable ripple handling and extended high‑temperature operation, offering a straightforward specification for procurement and system reliability planning.

Request a quote or submit a request for pricing and availability to evaluate LGX2G391MELB40 for your next power electronics design.