LGU2G391MELC

The LGU2G391MELC is a Nichicon LGU series aluminum electrolytic capacitor in a snap-in terminal radial can designed for general-purpose power applications. With a rated capacitance of 390 µF at 400 V and a snap-in mounting style, it addresses bulk energy storage and ripple suppression needs where high voltage handling and long-term thermal endurance are required.

This component is specified for operation from −25°C to +105°C and is built to withstand extended stress: it meets endurance requirements after 3000 hours at 105°C while supporting significant ripple current levels at both low and high frequencies.

Key Features

• Capacitance & Voltage — 390 µF nominal capacitance with a 400 V rated voltage and ±20% tolerance at 120 Hz, 20°C, suitable for high-voltage bulk storage and filtering.
• High Ripple Current Capability — Low-frequency ripple current of 1.6 A (120 Hz) and high-frequency ripple current of 2.288 A (100 kHz), enabling effective smoothing in applications with substantial AC ripple.
• Thermal Endurance — Designed for −25°C to +105°C operation with a rated lifetime of 3000 hours at 105°C when subjected to rated ripple and DC bias, supporting reliable long-term performance in elevated-temperature environments.
• Low Leakage — Specified leakage current of 1180 µA after voltage application, supporting designs that require controlled leakage behavior.
• Loss Factor Measurement — Tangent of loss angle (tan δ) measured at 20°C, 120 Hz; for the 400 V class the tan δ standard value applies as specified in the LGU series datasheet.
• Package & Mounting — Snap-in radial can (φ35 × 35L) for robust mechanical mounting and tray packing for handling and assembly.
• Regulatory — RoHS compliant as indicated for the LGU series.

Typical Applications

• General-purpose power filtering — Bulk smoothing and decoupling where 400 V rating and 390 µF capacitance deliver energy storage and ripple attenuation for high-voltage rails.
• High-voltage power supplies — DC link and output filtering in power conversion systems that require sustained ripple handling and thermal endurance up to 105°C.
• Industrial power modules — Energy buffering and ripple suppression in general-purpose industrial power equipment benefiting from snap-in mounting and tray packing for production assembly.

Unique Advantages

• Long-term thermal reliability: Rated for 3000 hours at 105°C under rated ripple and bias, enabling dependable operation in applications with sustained elevated temperatures.
• High ripple handling across frequencies: Explicit low- and high-frequency ripple current specs (1.6 A at 120 Hz, 2.288 A at 100 kHz) let designers size capacitors with clear thermal and performance margins.
• High-voltage capability: 400 V rating combined with 390 µF capacitance supports applications requiring substantial stored energy at elevated DC voltages.
• Robust mounting and assembly: Snap-in radial can package and tray packing simplify secure PCB mounting and volume handling for manufacturing workflows.
• Controlled leakage and loss characteristics: Specified leakage current and tan δ measurement conditions give predictable behavior for precision power designs.
• Environmental compliance: RoHS status supports deployment in environments requiring restricted substance compliance.

Why Choose LGU2G391MELC?

The LGU2G391MELC balances high-voltage energy storage with long-term thermal endurance and clear ripple-current specifications, making it a pragmatic choice for engineers designing general-purpose power systems that must tolerate elevated temperatures and continuous ripple stress. Its snap-in radial can package and tray packing support robust mechanical mounting and efficient assembly in production environments.

This part is well suited to customers seeking a proven electrolytic solution for high-voltage smoothing and bulk storage where predictable leakage, measured loss characteristics, and RoHS compliance are required. The LGU series backing provides standardized endurance and performance criteria you can design to and qualify against.

If you need pricing, availability, or a formal quote for LGU2G391MELC, submit a request and our team will respond with lead time and quantity options to support your design and production planning.