LHX2W391MELC40

The LHX2W391MELC40 is an aluminum electrolytic, snap-in terminal capacitor from Nichicon's LHX series, engineered for long-life performance at elevated temperatures. It delivers a high-voltage, high-capacitance solution for general-purpose electronic equipment that requires sustained reliability and thermal endurance.

Key value propositions include 450 V rating, 390 µF capacitance, snap-in radial can packaging, and verified long-life endurance at 125°C—making it appropriate where robust high-temperature operation and defined ripple handling are required.

Key Features

• Electrical Performance — 390 µF nominal capacitance with ±20% tolerance and 450 V rated voltage, providing substantial energy storage for high-voltage circuits.
• Ripple Handling — Rated ripple current of 1.7 A (120 Hz, 125°C) and 2.431 A at 50 kHz, enabling specified AC ripple dissipation under rated conditions.
• Thermal & Endurance — Operating temperature range of –40°C to +125°C with an endurance specification of 5000 hours at 125°C under DC bias plus rated ripple current.
• Leakage and Loss Characteristics — Leakage current specification consistent with datasheet limits (approx. 1.25 mA for this part) and tan δ ≤ 0.20 (120 Hz, 20°C) for controlled dissipation.
• Mechanical & Mounting — Snap-in radial can package (35 × 40 mm) for secure board mounting and straightforward assembly into power modules and equipment chassis.
• Environmental Compliance — RoHS compliant (2011/65/EU, (EU)2015/863), supporting regulatory requirements for restricted substances.

Typical Applications

• General-purpose electronic equipment — Designed for use in equipment where a 450 V, 390 µF polarized capacitor is required and long-life performance is needed.
• High-temperature systems — Suited to applications demanding sustained operation at elevated temperatures thanks to its –40°C to +125°C rating and 5000-hour endurance at 125°C.
• Power supply filtering and bulk energy storage — Provides defined ripple current capability (1.7 A at 120 Hz, higher at elevated frequency) for DC link filtering and energy buffering in power circuits.

Unique Advantages

• High-temperature endurance: 5000 hours rated at 125°C supports long-life operation and contributes to equipment reliability in elevated-temperature environments.
• High-voltage, high-capacitance combination: 450 V and 390 µF deliver substantial stored energy in a single component, reducing the number of parts required for high-voltage designs.
• Verified ripple specifications: Published ripple current values at 120 Hz and frequency-scaled values for higher frequencies enable predictable thermal and lifetime planning.
• Snap-in radial can packaging: Robust mechanical mounting for secure installation in power assemblies and ease of PCB integration.
• Regulatory compliance: RoHS conformity helps streamline regulatory acceptance and product documentation.

Why Choose LHX2W391MELC40?

The LHX2W391MELC40 positions itself as a reliable, long-life aluminum electrolytic option for designers who need a high-voltage, high-capacitance, snap-in solution rated for elevated temperatures. Its combination of 450 V rating, 390 µF capacitance, and 5000-hour endurance at 125°C addresses design requirements where sustained thermal performance and defined ripple handling are important.

This part is ideal for engineers specifying components for general-purpose equipment that demands predictable electrical behavior, mechanical robustness from snap-in mounting, and RoHS compliance for regulatory alignment. Its documented specifications make it straightforward to evaluate for long-term system reliability and thermal budgeting.

Request a quote or contact our sales team to discuss availability, lead times, and pricing for the LHX2W391MELC40.