LGX2W181MELC25

The LGX2W181MELC25 is a snap-in terminal aluminum electrolytic capacitor from Nichicon's LGX series, designed for long-life power applications. It delivers 180 µF capacitance at a 450 V rating and is optimized for rectifier circuits in general inverters and switching power supplies.

Built for durability in demanding thermal environments, this capacitor is specified for operation from −25 °C to +105 °C with a 5000-hour endurance at 105 °C under rated ripple current, providing predictable performance in industrial and power-conversion designs.

Key Features

• Electrical Performance — Rated capacitance 180 µF with ±20% tolerance and a rated voltage of 450 V, suitable for high-voltage smoothing and energy-storage tasks.
• Ripple-Current Capability — Rated ripple current of 1.1 A at 120 Hz and 1.573 A at 50 kHz, enabling reliable handling of AC ripple in rectifier and switching circuits.
• High-Temperature Long Life — Endurance specified as 5000 hours at 105 °C under DC bias plus rated ripple current; capacitance change remains within ±20% after the test.
• Wide Operating Temperature — Specified operation from −25 °C to +105 °C, with impedance stability characterized at low temperatures (Z(−25 °C)/Z(+20 °C) up to 8 for the 400–500 V range).
• Leakage and Dissipation Characteristics — Leakage current governed by I ≤ 3√(C·V) μA after 5 minutes at 20 °C; tangent of loss angle (tan δ) for 450 V items is specified with a maximum of 0.20 (measured at 120 Hz, 20 °C).
• Package & Mounting — Snap-in radial can package for secure PCB retention and robust mechanical mounting in power assemblies.
• Environmental Compliance — Compliant with the RoHS directive (2011/65/EU, (EU)2015/863).
• Physical Size & Marking — Physical dimensions L: 2.5 × D: 3.5 cm; sleeve printed with white lettering on a black background for easy identification.

Typical Applications

• Switching Power Supplies — Bulk smoothing and ripple filtering in high-voltage switching regulators and power converters where 450 V rating and high ripple capability are required.
• General Inverter Rectifiers — DC-link and rectifier circuits in general inverter systems that demand long-term stability at elevated temperature.
• Industrial Power Electronics — Energy storage and filtering in industrial converters and control equipment operating up to 105 °C.

Unique Advantages

• Long-life assurance: Rated for 5000 hours at 105 °C under rated ripple current, delivering predictable aging characteristics for extended service intervals.
• High-voltage capability: 450 V rating supports designs requiring elevated DC bus voltages without step-up circuitry.
• Measured ripple ratings: Specified ripple currents at 120 Hz and 50 kHz allow designers to size capacitors against actual operating ripple conditions.
• Low-temperature stability: Impedance limits at −25 °C provide quantifiable behavior for designs that must operate across wide ambient ranges.
• RoHS compliance: Meets 2011/65/EU and (EU)2015/863 requirements for hazardous-substance reduction.
• Snap-in mounting: Radial, snap-in can package eases PCB assembly and secures the component in high-vibration or mechanically demanding systems.

Why Choose LGX2W181MELC25?

LGX2W181MELC25 combines a high 450 V rating with 180 µF capacitance and validated ripple-handling to meet the needs of power-conversion and inverter rectifier designs. Its long-life specification at 105 °C and measurable electrical characteristics make it suitable for engineers who require predictable, documented performance under elevated temperature and ripple stress.

This part is appropriate for design teams and procurement sourcing capacitors for industrial power electronics and high-voltage switching supplies that prioritize endurance, electrical transparency, and RoHS-compliant components from an established series.

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