LAR2G391MELB40

The LAR2G391MELB40 from Nichicon is a snap‑in terminal aluminum electrolytic capacitor specified for high‑voltage, general‑purpose power applications. It delivers 390 µF capacitance at a 400 V rating in a radial, can‑type snap‑in package designed for robust PCB retention and power‑rail filtering.

Designed for sustained operation up to 105°C, this part is built to withstand 2000 hours of rated ripple current at 105°C and includes features that reduce short incidence under overvoltage conditions. The capacitor is RoHS compliant for environmental compliance.

Key Features

• High voltage rating — 400 V Supports high‑voltage DC rails for power supplies and industrial converters.
• Capacitance — 390 µF ±20% Bulk energy storage and filtering with a ±20% capacitance tolerance (measured at 120 Hz, 20°C).
• Snap‑in terminal, radial can package Snap‑in mounting provides secure mechanical retention for PCB assembly in power modules and chassis‑mounted designs.
• 105°C endurance — 2000 hours Specified to withstand 2000 hours of DC bias plus rated ripple current at 105°C with defined post‑test limits (capacitance within ±20%, tan δ ≤ 200% of initial, leakage ≤ initial).
• Ripple current capability Rated ripple current examples: 1.55 A at 120 Hz and 2.216 A at 50 kHz (frequency coefficient data available in the series datasheet).
• Low‑temperature performance For the 400 V range, impedance stability is specified with Z(−25°C)/Z(+20°C) ≤ 8 (measured at 120 Hz).
• Leakage current specification Initial leakage current meets I ≤ 3√(C·V) µA after 5 minutes’ application of rated voltage at 20°C (C in µF, V in V).
• Overvoltage safety behavior The series shows reduced incidence of short when subjected to 1.5× rated voltage with limited current; more than 60% of capacitors pass defined safety criteria (pressure relief vent operation or no opening for 10 minutes without short and flame).
• RoHS compliant Conforms to the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• Power supplies — Bulk filtering and smoothing on high‑voltage DC rails where 400 V capacitance is required.
• Industrial converters and inverters — Energy storage and ripple suppression in power conversion stages operating at elevated temperatures.
• Motor drive electronics — DC link and intermediate bus capacitors providing energy buffering and ripple control.
• General‑purpose high‑voltage systems — Applications that require robust, polarized electrolytic capacitance with snap‑in mounting for secure PCB installation.

Unique Advantages

• High voltage capability: 400 V rating permits use on higher DC bus rails without series strings.
• Designed for elevated temperature operation: 2000‑hour endurance at 105°C under rated ripple current provides predictable life performance in hot environments.
• Snap‑in mechanical reliability: Radial snap‑in terminals deliver strong PCB retention for power modules and vibration‑prone assemblies.
• Measurable ripple performance: Specified ripple current values at 120 Hz and 50 kHz allow engineers to size components against real ripple conditions.
• Safer overvoltage response: Series design reduces incidence of short under 1.5× rated voltage with defined safety pass criteria tied to pressure‑relief behavior.
• Regulatory compliance: RoHS conformity simplifies environmental and regulatory acceptance.

Why Choose LAR2G391MELB40?

LAR2G391MELB40 is positioned for designers who need a high‑voltage, robust electrolytic capacitor that balances bulk capacitance with elevated‑temperature endurance and secure snap‑in mounting. Its 400 V rating and 390 µF capacitance suit power supplies, converters, and other high‑voltage power systems where reliable ripple handling and predictable life at 105°C are required.

With defined leakage, impedance, and endurance specifications drawn from the LAR series datasheet, this Nichicon part delivers verifiable performance characteristics engineers can use directly in system design, qualification, and BOM selection.

Request a quote or submit an inquiry to receive pricing and availability information for LAR2G391MELB40 and to discuss sample and volume requirements.