LAR2W391MELB50

The LAR2W391MELB50 from Nichicon is a snap-in terminal aluminum electrolytic capacitor rated 450 V with a nominal capacitance of 390 µF. It is a general-purpose, high-voltage electrolytic designed for bulk energy storage, filtering and smoothing in higher-voltage assemblies.

Built for elevated-temperature operation, the LAR series specifies endurance at 105°C and includes design features aimed at reducing short incidence under overvoltage conditions. The part combines high voltage capability, long life specification and snap-in mechanical mounting for robust board-level installation.

Key Features

• Capacitance and Voltage — 390 µF nominal capacitance at a rated voltage of 450 V, suitable for higher-voltage DC circuits requiring bulk capacitance.
• Snap-in Terminal Package — Radial, can-type snap-in mounting simplifies board assembly and provides secure mechanical retention for through‑hole installations.
• High-temperature Endurance — Rated for 2000 hours at 105°C under DC bias plus rated ripple current; capacitance change remains within ±20% after endurance testing.
• Ripple Current Ratings — Specified ripple current of 1.61 A at 120 Hz and 2.302 A at 50 kHz to support AC ripple handling in power applications.
• Leakage and Loss Characteristics — Leakage current governed by I ≤ 3√CV (µA) after 5 minutes at 20°C; tangent of loss angle (tan δ) for 450 V rated parts specified up to 0.20 at 120 Hz, 20°C.
• Operating Temperature Range — Rated operation from −25°C to +105°C for 400–450 V parts, matching elevated-temperature environments.
• Safety and Overvoltage Behavior — Series-level design reduces incidence of shorts under overvoltage; safety performance specifies behavior when 1.5× rated voltage is applied with limited current.
• Regulatory Compliance — RoHS compliant as indicated in product data.
• Physical Size — Compact φ30 × 50 mm can (approx. 5 × 3 cm), designed for tray packing and mass production placements.

Typical Applications

• Power supplies — Bulk filtering and smoothing in higher-voltage DC power supplies where 450 V rating and 390 µF capacitance are required.
• Industrial power electronics — Energy storage and ripple handling in industrial converters and power modules operating up to 450 V.
• Uninterruptible power supplies (UPS) and energy buffers — High-voltage bulk capacitance for short-term energy buffering and decoupling.

Unique Advantages

• High-voltage capability: 450 V rating enables use in elevated-voltage circuits without series stacking.
• Designed for elevated-temperature service: 2000 hours endurance at 105°C supports reliable operation in hot operating environments.
• Predictable ripple performance: Specified ripple current values at 120 Hz and 50 kHz allow engineers to size capacitors against measured ripple loads.
• Snap-in mounting robustness: Radial snap-in terminals provide strong board retention for mass-production assembly and mechanical stability.
• Overvoltage safety behavior: Series-level measures reduce the incidence of shorting under overvoltage conditions and define passing criteria for overvoltage testing.
• RoHS compliance: Conforms to RoHS requirements for lead-free assemblies.

Why Choose LAR2W391MELB50?

The LAR2W391MELB50 is positioned for designs that require robust, high-voltage bulk capacitance with elevated-temperature endurance. Its 450 V rating, 390 µF capacitance and documented ripple current capability make it suitable for higher-voltage power systems where long-term stability at 105°C is important.

This part is appropriate for engineers and procurement teams building industrial and commercial power electronics where predictable leakage, loss characteristics and overvoltage behavior are required. The combination of snap-in mounting, tray packing for mass production and RoHS compliance supports scalable assembly and regulatory needs.

For pricing, lead-time and volume-quantity inquiries, request a quote or contact our sales team to discuss technical requirements and available support options.