LQS2W181MELA35

The LQS2W181MELA35 is an aluminum electrolytic, snap‑in terminal capacitor rated 450 V and 180 µF with ±20% tolerance. Designed for high‑temperature and high‑frequency environments, it supports continuous operation from −25°C to 105°C and is specified for 3000 hours at 105°C.

Suited to power‑electronics applications, this part is intended for use in high‑frequency regenerative voltage circuits for AC servomotors, general inverters, equipment operating in voltage‑fluctuating areas, and rectifier circuits such as voltage doublers. It is RoHS compliant.

Key Features

• High Voltage Rating — 450 V: Supports high‑voltage DC circuits and regenerative bus applications.
• Capacitance — 180 µF ±20%: Provides bulk energy storage for smoothing and pulse buffering in power conversion circuits.
• Temperature Range and Endurance: Rated for −25°C to 105°C with a 3000‑hour endurance at 105°C under DC bias plus rated ripple current.
• High‑speed Charge/Discharge Capability: Engineered for high‑frequency charge‑discharge behavior; tested for 50 million cycles at room temperature while maintaining specified electrical characteristics.
• Ripple Current Ratings: 870 mA at 120 Hz and 1.244 A at 50 kHz, supporting both low‑ and high‑frequency ripple conditions.
• Snap‑in Radial Can Package: Snap‑in terminal mounting provides secure board installation for power modules and inverter assemblies; package dimension roughly L: 3.5 × D: 2.5 cm.
• Leakage Current Specification: Leakage current meets I ≤ 3√(C·V) µA after 5 minutes at 20°C, enabling predictable standby and leakage behavior.
• RoHS Compliant: Conforms to the RoHS directive listed in the product data.

Typical Applications

• AC Servomotor Regenerative Circuits: Used in regenerative voltage paths to absorb and smooth high‑frequency energy returned to the DC link.
• General Inverters: Serves as DC link/bulk capacitance in inverter assemblies where stable high‑voltage capacitance is required.
• Voltage‑Doubler Rectifier Circuits: Suitable for rectifier stages employing voltage doubler topologies to provide required energy storage and ripple handling.
• Equipment Operating in Fluctuating Voltage Areas: Provides reliable smoothing and transient handling where supply voltages experience frequent variation.

Unique Advantages

• Voltage Headroom for Power Electronics: The 450 V rating accommodates high‑voltage DC bus designs without additional series parts.
• Designed for High‑Frequency Stress: Specified ripple current at 50 kHz and proven charge/discharge endurance make it suitable for aggressive switching environments.
• High‑Temperature Reliability: 105°C rating and 3000‑hour endurance at that temperature provide predictable long‑term performance in hot enclosures.
• Secure Snap‑in Mounting: Snap‑in terminals simplify assembly and provide robust mechanical retention for power modules and modules exposed to vibration.
• Predictable Leakage Performance: Leakage specified by I ≤ 3√(C·V) after initial application of rated voltage enables accurate system leakage budgeting.
• Standards‑level Compliance: RoHS compliance facilitates use in designs meeting current environmental directives.

Why Choose LQS2W181MELA35?

The LQS2W181MELA35 is positioned as a durable, high‑voltage bulk capacitor for power‑conversion and regenerative applications that need reliable energy buffering under high ripple and temperature stress. Its combination of 450 V rating, 180 µF capacitance, high‑frequency ripple capability, and proven endurance testing makes it suitable for engineers designing inverters, servo drives, and equipment exposed to fluctuating voltages.

This part is ideal for designs requiring a snap‑in radial can package with predictable leakage and thermal performance, and for teams prioritizing long‑term robustness and compliance with RoHS directives.

Request a quote or contact sales to discuss availability, lead times, and how LQS2W181MELA35 can meet the needs of your power‑electronics design.