LQS2G271MELZ50

The LQS2G271MELZ50 from Nichicon is a snap-in terminal aluminum electrolytic capacitor designed for high-speed charge–discharge applications. As part of the LQS series, it provides a 270 µF capacitance at 400 V with a compact radial can snap‑in package tailored for power electronics systems.

Engineered for demanding environments, this capacitor suits high-frequency regenerative circuits, general inverters and equipment exposed to fluctuating voltages. Key value propositions include 105 °C rated operation, high charge–discharge endurance, and RoHS compliance.

Key Features

• Capacitance & Voltage — 270 µF nominal capacitance rated at 400 V for bulk energy storage and smoothing in power circuits.
• High‑temperature operation — Specified operating range –25 to +105 °C to support elevated ambient and internal operating temperatures.
• Snap‑in radial can package — Snap‑in terminal mounting provides secure board attachment for high-current power assemblies.
• High speed charge–discharge endurance — Series-specified charge–discharge endurance test of 50 million cycles at room temperature (6 Hz, voltage difference = rated voltage + 0.35 V) with limits on capacitance change, tan δ and leakage current.
• 3000‑hour endurance at 105 °C — Rated endurance where capacitance change remains within ±20% after D.C. bias plus rated ripple current applied for 3000 hours at 105 °C.
• Ripple current capability — Specified ripple current of 1.22 A at 120 Hz and 1.745 A at 50 kHz suitable for AC and high‑frequency applications.
• Leakage current specification — Series leakage current limit I ≤ 3√(C·V) (μA) after 5 minutes’ application of rated voltage at 20 °C.
• Tolerance and polarization — Capacitance tolerance ±20% and polarized construction for typical electrolytic usage.
• RoHS compliant — Conforms to RoHS directive (2011/65/EU, (EU)2015/863).
• tan δ performance — For the 400 V rating, tan δ (max.) is specified as 0.15 (measurement at 120 Hz, 20 °C).

Typical Applications

• AC servomotor regenerative circuits — Handles high-frequency regenerative voltages and supports energy recapture in servo drives.
• General inverters and motor drives — Provides bulk smoothing and transient handling for inverter DC link and power conversion stages.
• Voltage‑fluctuation environments — Suited for equipment operating in areas with unstable supply voltages where robust surge and fluctuation tolerance is required.
• Rectifier and voltage doubler circuits — Applicable to rectifier stages and voltage doubler configurations requiring reliable high‑voltage electrolytic capacitance.

Unique Advantages

• Designed for high-frequency stress: Endurance and ripple current specs (1.22 A at 120 Hz; 1.745 A at 50 kHz) target demanding AC and high‑frequency applications.
• High-temperature durability: 105 °C rating with 3000 h endurance under rated conditions supports long-term performance in hot operating environments.
• Robust charge–discharge capability: Series-tested for 50 million charge–discharge cycles, maintaining capacitance and leakage within specified limits.
• Secure snap‑in mounting: Radial can with snap‑in terminals provides mechanical stability for power PCBs and simplifies assembly.
• Predictable electrical limits: Defined tan δ and leakage current formulas enable straightforward thermal and loss budgeting in designs.
• Regulatory compliance: RoHS conformity supports regulatory and environmental requirements for electronic equipment.

Why Choose LQS2G271MELZ50?

The LQS2G271MELZ50 integrates high-voltage (400 V) capacitance, elevated temperature rating (–25 to +105 °C), and snap‑in mounting to address power electronics designs that require reliable energy storage under frequent charge–discharge cycles. As part of Nichicon’s LQS series, it is aimed at applications such as inverters, servo drives and rectifier circuits where regenerative events and voltage fluctuations demand robust capacitors.

For engineers and procurement teams building power conversion systems, this part delivers specified ripple current handling, long-term endurance, and clear electrical limits to support predictable system behavior and service life.

Request a quote or submit a design inquiry to receive pricing, availability, and technical support for incorporating the LQS2G271MELZ50 into your next power electronics project.