LQS2W181MELZ45

The LQS2W181MELZ45 from Nichicon is a polarized aluminum electrolytic capacitor with 180 µF capacitance and a 450 V rated voltage in a snap‑in can package. It is engineered for high‑speed charge/discharge duty and high‑frequency power applications.

Designed for demanding power environments, this capacitor supports operation from –25°C to +105°C, delivers defined ripple current capacity, and is suited for regenerative and voltage‑fluctuating circuits. The part is RoHS compliant and built to the endurance requirements detailed in the LQS series specifications.

Key Features

• Capacitance and Voltage — 180 µF nominal capacitance with a 450 V rated voltage and ±20% tolerance at 120 Hz, 20°C.
• Snap‑in, Radial Can Package — Snap‑in terminal type and radial can (snap‑in) package for secure board mounting in power assemblies.
• High‑temperature Operation — Rated for continuous use from –25°C to +105°C with specified endurance up to 3000 hours at 105°C under D.C. bias plus rated ripple current.
• High‑speed Charge/Discharge Endurance — Specified to meet performance after 50 million charge/discharge cycles (6 Hz, δV = rated voltage + 0.35), with capacitance change within ±20%.
• Ripple Current Capability — Rated ripple current of 870 mA at 120 Hz and 1.244 A at 50 kHz to support high‑frequency inverter and regenerative circuits.
• Leakage and Loss Characteristics — Leakage current specified as I ≤ 3√(C·V) µA after 5 minutes at 20°C; tangent of loss angle (tan δ) maximum for 450 V is 0.20 (measured at 120 Hz, 20°C).
• Low‑temperature Stability — Impedance ratio Z(–25°C)/Z(+20°C) specified up to 8 for the 350–450 V range, supporting performance in fluctuating ambient temperatures.
• Physical Size — Compact can dimensions: L: 4.5 × D: 2.2 cm, facilitating integration into power modules and inverter assemblies.
• RoHS Compliant — Meets the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• AC Servomotor Drives — Used in high‑frequency regenerative voltage circuits to handle rapid charge/discharge events in motor drive systems.
• General Inverters — Supports inverter DC link and filtering where high ripple current and voltage stability are required.
• Voltage‑Doubler Rectifier Circuits — Suited for rectifier stages in voltage doubler configurations where robust high‑voltage capacitors are needed.
• Equipment in Fluctuating Voltage Environments — Appropriate for systems exposed to frequent voltage swings thanks to specified charge/discharge endurance and temperature rating.

Unique Advantages

• High Voltage Handling: 450 V rating enables use in DC link and high‑voltage power circuits.
• Thermal Reliability: Rated for –25°C to +105°C and endurance of 3000 hours at 105°C under specified conditions, supporting sustained operation in hot enclosures.
• Designed for Repetitive Charge/Discharge: Tested for 50 million charge/discharge cycles with controlled limits on capacitance change, tan δ, and leakage current.
• Measured Ripple Capability: Defined ripple current values at 120 Hz and 50 kHz provide clear design inputs for thermal and lifetime calculations.
• Board‑Ready Snap‑in Package: Snap‑in terminals and radial can format simplify mounting in power assemblies and reduce mechanical stress on PCB.
• Regulatory Compliance: RoHS compliance supports use in regulated markets and simplifies material management.

Why Choose LQS2W181MELZ45?

The LQS2W181MELZ45 combines a high 450 V rating with 180 µF capacitance in a snap‑in aluminum electrolytic package designed for high‑frequency, high‑stress power environments. Its documented ripple current capability, charge/discharge endurance, and high‑temperature rating make it well suited for designers of inverters, motor drives, and other systems that require reliable energy buffering under fluctuating voltages.

Engineered within Nichicon’s LQS series specifications and compliant with RoHS, this capacitor offers verifiable electrical and environmental characteristics to support robust, long‑term designs in industrial and power electronics applications.

Request a quote or contact sales to discuss availability, lead times, and to obtain detailed ordering information for the LQS2W181MELZ45.