LQS2W271MELB35

The LQS2W271MELB35 is a snap-in terminal aluminum electrolytic capacitor designed for high-voltage power electronics. It delivers 270 µF at a 450 V rating in a radial, can-style snap-in package sized 30 × 35 mm and is intended for high-frequency charge–discharge and regenerative applications.

Engineered for demanding power circuits, the part offers high ripple handling, a wide operating temperature range of −25°C to 105°C, and endurance specified to 3000 hours at 105°C. Typical use cases include inverters, AC servomotor drives, and equipment operating in voltage-fluctuating environments where robust high-voltage energy storage is required.

Key Features

• Rated Capacitance & Voltage — 270 µF nominal capacitance at 450 V, suitable for high-voltage DC bus and energy-storage applications.
• High Ripple Capability — Rated ripple current of 1.23 A at 120 Hz (low frequency) and 1.759 A at 50 kHz (high frequency) to support power-conversion ripple demands.
• Loss Factor (tan δ) — tan δ (DF) 0.20 at 120 Hz (20°C) for the 450 V rating, supporting predictable AC performance.
• Leakage Current — Specified leakage current of 1040 µA, measurable after rated-voltage application conditions.
• Thermal & Endurance — Rated for operation from −25°C to +105°C with an endurance rating of 3000 hours at 105°C under DC bias plus rated ripple current.
• Robust Charge–Discharge Endurance (Series) — The LQS series is specified for charge–discharge endurance (50 million cycles at designated conditions) per the series datasheet.
• Polar Snap-In Package — Radial, can-style snap-in terminals for secure PCB mounting and high-current connections; supplied in tray packing for mass production.
• Regulatory — RoHS compliant per the product information.

Typical Applications

• AC Servomotor Drives — Energy buffering and regenerative voltage handling in servo drive DC buses where frequent charge–discharge events occur.
• General Inverters — DC link and smoothing capacitor for inverters that require high-voltage, high-ripple capability.
• Voltage-Fluctuating Equipment — Systems operating in environments with variable supply voltages, benefiting from the capacitor’s voltage stability and endurance.
• Rectifier / Voltage Doubler Circuits — High-voltage energy storage and smoothing in rectifier topologies and voltage-doubling arrangements.

Unique Advantages

• High-Voltage Energy Storage: 450 V rating with 270 µF capacitance provides significant DC-bus energy density for power-electronic systems.
• Designed for High Ripple: Dual ripple specifications (120 Hz and 50 kHz) support both mains-frequency smoothing and high-frequency switching environments.
• Elevated Temperature Endurance: 3000 hours at 105°C under rated conditions for sustained performance in thermally demanding enclosures.
• Snap-In Mounting: Radial snap-in terminals enable secure mechanical and electrical installation for high-current PCB assemblies.
• Predictable AC Losses: Specified tan δ (0.20 at 450 V, 120 Hz) helps engineers model loss and thermal behavior accurately.
• RoHS Compliant: Meets RoHS directive requirements for use in regulated markets.

Why Choose LQS2W271MELB35?

The LQS2W271MELB35 positions itself as a practical choice for power-electronics designers requiring high-voltage, high-ripple capacitors with proven thermal endurance. Its combination of 450 V rating, 270 µF capacitance, and snap-in mounting addresses the core needs of inverters, servo drives, and regenerative circuits where energy density and reliability over time are critical.

Backed by the LQS series specifications—including charge–discharge endurance characteristics and 3000-hour life at 105°C—this part suits production designs that demand predictable electrical behavior, secure installation, and RoHS compliance.

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