LQS2G181MELA30

The LQS2G181MELA30 is a Nichicon LQS-series aluminum electrolytic capacitor in a snap‑in radial can package, rated 400 V and 180 µF. It is designed for power-electronics environments where high-frequency charge/discharge and voltage fluctuation tolerance are required.

Typical use cases include regenerative circuits for AC servomotors, general inverters, voltage-doubler rectifiers and other industrial power systems. The device combines a compact 25 mm × 30 mm form factor with a 105°C operating limit and a 3,000 hour life at 105°C.

Key Features

• Capacitance & Voltage: 180 µF nominal capacitance with a 400 V rated voltage and ±20% tolerance, providing energy storage for high-voltage power stages.
• High-temperature rating: Rated for operation from –25°C to +105°C with a specified endurance of 3,000 hours at 105°C.
• Snap‑in radial can package: 25 mm diameter × 30 mm length snap‑in can for secure board mounting in power modules and inverter assemblies.
• Ripple current capability: Specified ripple currents of 950 mA at 120 Hz and 1.359 A at 50 kHz, supporting both low- and high-frequency ripple environments.
• Charge–discharge endurance: Series-level endurance validated for repetitive charge/discharge behavior (50 million cycles, charge‑discharge voltage difference = rated voltage + 0.35 V, 6 Hz) with capacitance change within ±20% of initial value.
• Leakage and dissipation parameters: Leakage current specified as I ≤ 3√(C·V) µA after 5 minutes at rated voltage (20°C); tangent of loss angle (tan δ) max 0.15 at 400 V (measured at 120 Hz, 20°C).
• Polarized design & RoHS compliance: Polarized aluminum electrolytic capacitor constructed to meet RoHS (2011/65/EU, (EU)2015/863) requirements.

Typical Applications

• AC servomotor regenerative circuits: Energy buffering and high-frequency regenerative voltage handling in servo drives and motion-control systems.
• General inverters and motor drives: Bulk and smoothing capacitance for inverter DC-link and power conversion stages where voltage can fluctuate.
• Voltage-doubler rectifiers: Use in rectifier circuits that implement voltage doubling topology for mid- to high-voltage power supplies.
• Industrial power electronics: General-purpose power filtering and energy storage in industrial converters and control equipment.

Unique Advantages

• High-voltage capability: 400 V rating enables use in DC-link and high-voltage power assemblies without series stacking.
• High-temperature endurance: 3,000 hours at 105°C provides predictable service life in elevated-temperature enclosures and power racks.
• Designed for repetitive charge/discharge: Series-level validation for 50 million charge/discharge cycles supports applications with frequent regenerative events.
• Frequency-flexible ripple handling: Explicit ripple current specifications at both 120 Hz and 50 kHz allow designers to size capacitors for mixed-frequency ripple environments.
• Clear performance metrics: Defined leakage current formula (I ≤ 3√CV µA) and tan δ limits provide measurable electrical targets for design verification.
• RoHS compliant: Meets RoHS 2011/65/EU and (EU)2015/863 requirements for regulated substances.

Why Choose LQS2G181MELA30?

The LQS2G181MELA30 positions itself as a robust electrolytic solution for industrial power-electronics designs that demand high-voltage handling, high-temperature endurance, and repeated charge/discharge capability. Its 400 V rating, 180 µF capacitance and defined ripple/current endurance make it suitable for DC-link, regenerative and rectifier applications where predictable electrical behavior is required.

Designed and manufactured by Nichicon as part of the LQS series, this capacitor is aimed at engineers building inverter drives, servo systems and industrial power supplies who require clear, testable specifications for lifetime, leakage, tan δ and ripple current.

Request a quote or submit your requirements to discuss availability, pricing, and application-specific recommendations for the LQS2G181MELA30.