LGW2W391MELC40

The LGW2W391MELC40 is a snap‑in terminal aluminum electrolytic capacitor designed for high‑ripple, high‑voltage power applications. It delivers 390 µF capacitance at a 450 V rating and is built for continuous operation up to 105°C, making it suitable for demanding industrial and power‑electronics environments.

This polarized, radial can (snap‑in) capacitor is intended for general‑purpose use where high ripple current endurance and reliable long‑term performance are required.

Key Features

• Capacitance & Voltage: 390 µF nominal capacitance with a 450 V rated voltage and ±20% tolerance, providing bulk energy storage for high‑voltage systems.
• High Ripple Current & Endurance: Designed for high ripple current; specified to withstand 3000 hours of rated ripple current at 105°C, supporting continuous heavy use.
• Ripple Current Performance: Rated ripple current of 2.42 A at 120 Hz and 3.461 A at 100 kHz, enabling effective filtering across low and high frequencies.
• Operating Temperature: Rated for operation from −25°C to 105°C (category for 400–450 V), suitable for elevated ambient conditions.
• Low‑temperature impedance behavior: Impedance ratio Z(−25°C)/Z(+20°C) = 8 for the 400–450 V category, useful for evaluating performance in cooler environments.
• Leakage and dissipation characteristics: Leakage current specified as I ≤ 3√(C·V) µA after 5 minutes at 20°C; tangent of loss angle (tan δ) max 0.20 at 450 V (120 Hz, 20°C).
• Package & Mounting: Radial can, snap‑in terminal package for secure PCB mounting; physical dimensions approximately L: 4.0 × D: 3.5 cm with seated height 1.575 inch.
• RoHS Compliance: Conforms to the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• Power supply bulk filtering: Bulk energy storage and smoothing in high‑voltage power supplies and converters where sustained ripple handling and high voltage rating are required.
• DC‑link capacitors in inverters and converters: DC‑link smoothing for industrial inverter stages and power conversion topologies that demand robust ripple endurance at elevated temperatures.
• Industrial power equipment: Use in industrial drives, UPS systems, and power conditioning equipment that operate continuously and require long endurance under ripple stress.

Unique Advantages

• Proven ripple endurance: Specified to endure 3000 hours of rated ripple current at 105°C, offering predictable lifespan under continuous ripple loading.
• High voltage capability: 450 V rating enables use in higher‑voltage power rails without series stacking, simplifying design.
• Broad ripple frequency handling: Specified ripple current at both 120 Hz and 100 kHz supports effective filtering across a wide frequency range.
• Robust thermal window: Rated for operation up to 105°C, allowing deployment in elevated ambient or internally heated enclosures.
• Secure PCB mounting: Snap‑in terminal radial can provides reliable mechanical retention for high‑vibration or high‑current PCB assemblies.
• Regulatory compliance: RoHS compliant for use in products targeting restricted‑substance requirements.

Why Choose LGW2W391MELC40?

The LGW2W391MELC40 combines high capacitance at a 450 V rating with a snap‑in package engineered for high ripple environments. Its 3000‑hour endurance at 105°C under rated ripple current provides a measurable reliability baseline for designers addressing continuous duty power systems.

This part is well suited for engineers designing high‑voltage power supplies, DC‑link networks, and industrial power equipment who require durable, RoHS‑compliant aluminum electrolytic capacitors from an established manufacturer.

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