LAK2G391MELC45ZB

The LAK2G391MELC45ZB is a snap‑in terminal aluminum electrolytic capacitor from Nichicon’s LAK series, offering 390 µF capacitance at a 400 V rating. Designed for general‑purpose use, it delivers high ripple handling and extended high‑temperature endurance for equipment operating in voltage‑fluctuating environments.

Key value comes from its combination of 2000 hours endurance at 105°C, enhanced safety measures for abnormal overvoltage conditions, and robust ripple current capability across low and high frequencies.

Key Features

• Capacitance & Voltage — 390 µF rated capacitance with a 400 V nominal voltage and ±20% tolerance (120 Hz, 20°C).
• High‑temperature Endurance — Rated for 2000 hours at 105°C when subjected to DC bias plus rated ripple current, meeting the LAK series endurance specification.
• Ripple Current Capability — 1.32 A at 120 Hz (low frequency) and 1.518 A at 10 kHz (high frequency) to support smoothing and filtering under varying load conditions.
• Leakage and Loss — Leakage current specified at 1180 µA and tangent of loss angle (tan δ) ≤ 0.20 at 20°C, 120 Hz.
• Safety Design — Improved safety features for abnormally excessive voltage and a pressure relief vent that operates without causing flames or dispersion of parts under defined test conditions.
• Package & Mounting — Radial can with snap‑in terminals for secure vertical mounting; size φ35 × 45 mm (D × L), tray packing for production handling.
• Operating Range & Compliance — Operating temperature −25°C to 105°C; RoHS compliant.

Typical Applications

• General‑purpose power filtering — Use where high-capacitance, high-voltage smoothing is required for general electronic equipment.
• Equipment in voltage‑fluctuating areas — Designed for applications that experience unstable supply conditions, benefitting from the LAK series’ enhanced overvoltage safety features.
• High‑temperature, high‑ripple environments — Suited for designs that require sustained ripple current handling and long endurance at elevated temperatures (2000 h at 105°C).

Unique Advantages

• High voltage capability: 400 V rating enables use in higher‑voltage circuits without adding series components.
• Robust ripple performance: Dual ripple specifications (1.32 A at 120 Hz, 1.518 A at 10 kHz) provide predictable behavior across common frequency ranges.
• Extended high‑temperature life: 2000 hours endurance at 105°C reduces replacement frequency in hot operating environments.
• Built‑in safety features: Pressure relief vent and improved protection for abnormal voltages increase operational safety under stress conditions.
• Secure snap‑in mounting: Radial snap‑in terminals allow fast, reliable mechanical installation for vertical chassis or board mounting.
• Standards compliance: RoHS conformity supports regulatory requirements for lead‑free assemblies.

Why Choose LAK2G391MELC45ZB?

The LAK2G391MELC45ZB combines high voltage rating, substantial capacitance, and validated endurance at elevated temperature to meet demanding general‑purpose and voltage‑fluctuating applications. Its ripple handling across low and high frequencies, defined leakage and dissipation characteristics, and series safety features provide engineers with a verifiable component choice for robust power filtering and energy‑storage needs.

This capacitor is suited for designs where predictable long‑term performance, mechanical stability via snap‑in mounting, and compliance with RoHS are required. Choosing this part supports reliable system operation in applications that demand sustained ripple handling and high‑temperature durability.

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