LQS2G271MELA40

The LQS2G271MELA40 from Nichicon is a snap‑in terminal aluminum electrolytic capacitor in the LQS series, specified at 270 µF and 400 V. It is designed for high‑speed charge/discharge and high frequency regenerative voltage applications, where robust ripple handling and thermal endurance at elevated temperatures are required.

Suited to power electronics applications such as AC servomotor drives, general inverters, voltage‑doubler rectifier circuits and equipment operating in areas with fluctuating supply voltage, this polarized radial can offers a combination of high voltage rating, 105°C operating temperature and series‑proven endurance.

Key Features

• Capacitance & Voltage: 270 µF capacitance at a rated voltage of 400 V, with ±20% tolerance (–20% to +20%).
• High‑Temperature Operation: Rated for operation from –25°C to +105°C, enabling use in elevated ambient temperature environments.
• High Speed Charge‑Discharge: Snap‑in terminal, designed for high speed charge/discharge cycles and high frequency regenerative voltages.
• Ripple Current Capability: Rated ripple current of 1.22 A at 120 Hz and 1.745 A at 50 kHz, supporting AC and high frequency ripple conditions.
• Endurance: Endurance specified as 3000 hours at 105°C with DC bias plus rated ripple current; capacitance change is within ±20% after endurance test.
• Leakage Current & Dissipation Factor: Leakage current meets I ≤ 3√(C·V) (μA) after 5 minutes at 20°C; tan δ (dissipation factor) at 400 V is specified up to 0.15.
• Package & Mounting: Radial can, snap‑in mounting for board or chassis installation; physical size approximately L: 4.0 cm × D: 2.5 cm.
• RoHS Compliance: Compliant to RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• AC Servomotor Drives: Handles high frequency regenerative voltages and rapid charge/discharge cycles common in motor control inverters.
• General Inverters and Power Converters: Provides bulk energy storage and ripple filtering in inverters and converter stages operating at elevated temperatures.
• Voltage‑Doubler Rectifier Circuits: Suitable for rectifier topologies that require high voltage, high ripple endurance capacitors.
• Equipment in Fluctuating Voltage Environments: Designed for systems subject to frequent voltage swings where stable capacitance and leakage behavior are necessary.

Unique Advantages

• High Thermal Endurance: 3000 hours rated life at 105°C provides predictable performance in hot operating conditions.
• Designed for High Frequency Stress: Specified ripple currents at both 120 Hz and 50 kHz demonstrate suitability for AC and high frequency applications.
• Robust Charge‑Discharge Durability: Meets series charge‑discharge endurance tests (50 million cycles at specified conditions) with capacitance retention and controlled tan δ change.
• Clear Electrical Limits: Leakage current formula and tan δ specification (0.15 at 400 V) enable straightforward electrical design margining.
• Industry‑Oriented Form Factor: Snap‑in radial can simplifies mounting for power assemblies and facilitates secure mechanical retention under vibration and thermal stress.

Why Choose LQS2G271MELA40?

The LQS2G271MELA40 combines a 400 V rating and 270 µF capacitance with snap‑in mounting and a 105°C temperature rating to address demanding power electronics tasks. Its specified ripple currents, leakage current limit, and endurance characteristics make it a practical choice for designs requiring reliable energy buffering and frequent charge/discharge cycles.

This part is well suited to engineers building inverters, motor drives, and rectifier circuits who need a verified, RoHS‑compliant electrolytic capacitor with documented electrical and thermal performance from a recognized manufacturer and series (Nichicon LQS).

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