LAS2G391MELB40ZB

The LAS2G391MELB40ZB is a 390 µF, 400 V aluminum electrolytic capacitor in a snap‑in terminal radial can designed for general‑purpose power applications. It delivers high ripple current handling in a compact φ30 × 40 mm case and is designed for equipment operating where supply voltages can fluctuate.

Engineered for elevated operating temperatures, this capacitor is specified for continuous use up to 105°C with confirmed endurance at rated ripple current, and includes enhanced safety features for abnormal overvoltage conditions. The part is RoHS compliant (2011/65/EU, (EU)2015/863).

Key Features

• Capacitance & Voltage: 390 µF nominal capacitance with a rated voltage of 400 V and capacitance tolerance ±20% at 120 Hz, 20°C.
• High Temperature Endurance: Rated for operation from −25°C to +105°C and specified to withstand 2000 hours of D.C. bias plus rated ripple current at 105°C.
• Ripple Current Performance: Rated ripple current 1.55 A at 120 Hz and 1.782 A at 10 kHz; frequency coefficients apply (e.g., 1.00 at 120 Hz, 1.15 at 10 kHz or more).
• Safety & Reliability: Improved safety features for abnormally excessive voltage; the pressure relief vent is designed to operate without producing dangerous conditions. Endurance criteria: capacitance change within ±20%, tan δ ≤ 200% of initial, leakage current ≤ initial after endurance test.
• Package & Mounting: Snap‑in terminal radial can (φ30 × 40 mm / L: 4 × D: 3 cm) with printed white lettering on a black sleeve for clear identification.
• Leakage Current Specification: Leakage current follows the datasheet formula (I ≤ 3√C µA after 5 minutes at 20°C) and meets shelf‑life recovery requirements after recommended voltage treatment.
• Regulatory Compliance: RoHS compliant (2011/65/EU, (EU)2015/863).

Typical Applications

• General‑purpose power filtering: Bulk decoupling and smoothing in power modules where a 400 V rating and 390 µF capacitance are required.
• Equipment subject to voltage fluctuation: Suited for systems operating in environments with unstable supply voltages due to its improved abnormal‑voltage safety features.
• High‑temperature installations: Applications that require reliable performance at elevated temperatures up to 105°C and long endurance at rated ripple current.

Unique Advantages

• Compact footprint with high ripple capacity: Smaller case size yet higher ripple current capability compared with the LAQ series, enabling space savings without sacrificing performance.
• Validated 2000‑hour endurance at 105°C: Provides predictable long‑term behavior under high temperature and ripple conditions—capacitance change and leakage remain within defined limits.
• Designed for abnormal voltage events: Enhanced safety measures and a pressure relief vent reduce the risk of hazardous failure modes during overvoltage stress.
• Frequency‑aware ripple handling: Ripple current coefficients are provided across frequency (e.g., 0.88 at 50 Hz to 1.15 at 10 kHz+), allowing designers to size for real operating spectra.
• Easy installation: Snap‑in radial can package simplifies board mounting for high‑current power designs.
• RoHS compliance: Meets current RoHS requirements for use in regulated assemblies.

Why Choose LAS2G391MELB40ZB?

LAS2G391MELB40ZB combines high capacitance (390 µF) and a 400 V rating in a compact snap‑in can aimed at power systems requiring robust ripple handling and high‑temperature endurance. The part’s 2000‑hour qualification at 105°C under rated ripple current, coupled with explicit safety performance criteria and frequency coefficients for ripple current, makes it suitable for engineers designing equipment that must tolerate fluctuating supply conditions.

This capacitor is well suited to designers and procurement teams seeking a reliable, RoHS‑compliant electrolytic solution that balances size, ripple capability, and defined long‑term performance characteristics—backed by datasheet‑specified endurance and safety parameters.

If you would like pricing, lead‑time information, or a formal quote for LAS2G391MELB40ZB, please request a quote or contact our sales team to discuss availability and requirements.