LAQ2G391MELC40ZB

The LAQ2G391MELC40ZB is a snap‑in terminal aluminum electrolytic capacitor from Nichicon’s LAQ series. It delivers 390 µF capacitance at a 400 V rating in a compact radial, snap‑in can sized φ35 × 40 mm, designed for general‑purpose power applications.

Key value comes from its high operating temperature capability (–25°C to 105°C), robust ripple‑current handling at both low and high frequencies, and a 2000‑hour endurance rating at 105°C—features that support reliable bulk filtering and energy buffering in demanding environments.

Key Features

• Type & Construction Snap‑in terminal aluminum electrolytic capacitor in a radial, can‑style package (φ35 × 40 mm) for secure mounting and compact power designs.
• Capacitance & Voltage 390 µF nominal capacitance with a 400 V rated voltage and ±20% tolerance at 120 Hz, 20°C.
• High‑Temperature Endurance Rated for operation from –25°C to 105°C with a specified endurance of 2000 hours at 105°C under D.C. bias plus rated ripple current.
• Ripple Current Performance Low‑frequency ripple current: 1.59 A (120 Hz). High‑frequency ripple current: 1.829 A (10 kHz), enabling effective smoothing across a range of operating frequencies.
• Leakage Current Specification Measured leakage current of 1180 µA; the series datasheet also specifies the general leakage formula I ≤ 3√C (µA) after 5 minutes at 20°C.
• Safety & Reliability Designed with a pressure‑relief vent to prevent dangerous conditions under abnormal voltage stress; part of a series specified for permissible abnormal voltage at 105°C.
• Compliance RoHS‑compliant construction for regulatory environmental requirements.

Typical Applications

• Power supply bulk filtering — 400 V rating and 390 µF capacitance provide bulk energy storage and smoothing for general‑purpose power supplies.
• DC link and energy buffering — High ripple‑current capability at 120 Hz and 10 kHz supports energy buffering and decoupling in power conversion stages.
• Industrial and commercial equipment — 105°C endurance and snap‑in mounting offer reliable performance under elevated temperature and vibration conditions common in industrial systems.

Unique Advantages

• High voltage capability: 400 V rating lets designers use fewer or smaller capacitors for high‑voltage circuits.
• Robust ripple handling: Specified ripple currents at both low and high frequencies enable effective filtering across switching and line frequencies.
• Long high‑temperature life: 2000 hours at 105°C provides predictable ageing characteristics for designs exposed to sustained elevated temperatures.
• Snap‑in radial package: Secure mechanical mounting for power assemblies while keeping board space and assembly practical.
• Measurable leakage behavior: Clear leakage current value (1180 µA) and the datasheet leakage formula support margin and reliability calculations.
• RoHS compliant: Meets environmental material requirements for modern commercial and industrial products.

Why Choose LAQ2G391MELC40ZB?

The LAQ2G391MELC40ZB combines a compact snap‑in can, high voltage rating, and strong ripple‑current capability with a 105°C endurance profile—making it a practical choice for engineers designing general‑purpose power systems that require reliable bulk capacitance under elevated temperatures. Its specified leakage, tolerance, and safety venting provide the measurable characteristics needed for conservative design and lifetime planning.

This part is suitable for customers seeking a durable, high‑voltage electrolytic capacitor for industrial and commercial power applications where stable capacitance, ripple handling, and RoHS compliance are important considerations.

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