LQS2W181MELB30

The LQS2W181MELB30 is a snap‑in terminal aluminum electrolytic capacitor designed for high‑speed charge‑discharge applications. It delivers 180 µF capacitance at a 450 V rating in a radial, snap‑in can package and is polarized for DC use.

Engineered for industrial power electronics, this capacitor is suited for high‑frequency regenerative voltages, general inverters and rectifier circuits such as voltage doublers. It is rated to operate from –25°C to 105°C and is RoHS compliant.

Key Features

• Capacitance & Voltage — 180 µF rated capacitance at 450 V with a tolerance of ±20% (–20% to +20%).
• High‑Temperature Operation — Continuous operating range from –25°C to 105°C with a specified endurance of 3000 hours at 105°C.
• High‑Speed Charge‑Discharge — Snap‑in terminal design for rapid charge and discharge; series specification includes validation for 50 million charge‑discharge cycles (6 Hz, δV = rated voltage + 0.35) with defined retention limits.
• Ripple Current Capability — Specified ripple current of 870 mA at 120 Hz and 1.244 A at 50 kHz to support both low‑ and high‑frequency switching environments.
• Mounting & Package — Radial, can-type snap‑in package for secure panel or PCB installation in power modules.
• Environmental Compliance — Compliant with RoHS directives (2011/65/EU, (EU)2015/863).

Typical Applications

• AC servomotor regenerative circuits — Handles high‑frequency regenerative voltage for energy recapture and smoothing in servo drives.
• General inverters — Provides bulk energy storage and ripple filtering in inverter DC link and switching stages.
• Voltage‑doubler rectifier circuits — Suited for use in rectifier circuits requiring robust DC storage in doubled‑voltage topologies.
• Equipment in fluctuating‑voltage environments — Designed to cope with voltage variations common in industrial power systems and utility‑unstable locations.

Unique Advantages

• High‑voltage energy buffering: 450 V rating combined with 180 µF capacitance provides substantial DC link energy storage for power electronics designs.
• Validated charge‑discharge durability: Series endurance testing includes 50 million charge‑discharge cycles with capacitance and leakage limits defined, supporting designs with frequent switching events.
• Frequency‑capable ripple handling: Specified ripple currents at both 120 Hz and 50 kHz enable use across a range of switching frequencies and regenerative scenarios.
• Thermal endurance for harsh enclosures: Rated to 105°C with a 3000‑hour endurance specification, helping maintain performance in elevated ambient or enclosed installations.
• Quick, secure mounting: Snap‑in radial can simplifies mechanical installation for power modules and cabinet‑mounted assemblies.
• Compliance‑ready: RoHS conformity supports deployment in regions requiring restricted‑substance compliance.

Why Choose LQS2W181MELB30?

The LQS2W181MELB30 positions itself as a robust aluminum electrolytic solution for industrial power electronics that require high voltage, reliable charge‑discharge performance and thermal endurance. Its combination of 450 V rating, substantial capacitance and validated lifecycle behavior makes it a practical choice for inverter DC links, regenerative servo circuits and voltage‑doubler rectifiers operating in challenging electrical and thermal environments.

For designers and procurement teams, the LQS2W181MELB30 offers quantifiable endurance (50 million charge‑discharge cycles) and a defined 3000‑hour lifetime at 105°C, delivering predictable long‑term behavior and compliance with current RoHS requirements.

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