LQS2V471MELC30

The LQS2V471MELC30 is a snap‑in terminal aluminum electrolytic capacitor from Nichicon's LQS series, specified for high‑speed charge–discharge applications. It provides 470 µF nominal capacitance at 350 V with polarized construction and is designed for use where high frequency regenerative voltages and fluctuating system voltages are present.

Engineered for demanding power‑electronics environments, this capacitor supports operation from −25°C to +105°C, a rated lifetime of 3000 hours at 105°C, defined leakage limits, and measured ripple current values for both low and high frequencies.

Key Features

• Capacitance & Voltage — 470 µF rated capacitance at 350 V with ±20% tolerance, providing bulk energy storage for power conversion and regenerative circuits.
• High‑temperature operation — Rated for operation from −25°C to +105°C and qualified for 3000 hours at 105°C under rated conditions.
• High‑speed charge–discharge endurance — Specified endurance for charge–discharge behavior: after 50 million cycles (δV = rated voltage + 0.35, 6 Hz) at room temperature, capacitance remains within ±20% and leakage/tan δ remain within specified limits.
• Endurance under bias — Endurance defined for DC bias plus rated ripple current applied for 3000 hours at 105°C with capacitance change within ±20% and controlled tan δ and leakage current.
• Ripple current performance — Rated ripple current of 1.4 A at 120 Hz and 2.002 A at 50 kHz for managing AC and high‑frequency ripple in inverter and servo systems.
• Low leakage specification — Leakage current specified as I ≤ 3√(C·V) (µA) after 5 minutes at rated voltage and 20°C, enabling predictable standby and charged‑state behavior.
• Snap‑in radial can package — Snap‑in terminal mounting (radial, can – snap‑in) for robust mechanical attachment; physical size L: 3 × D: 3.5 cm with a maximum seated height of 1.181 inch.
• Environmental compliance — Compliant with the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• AC servomotor drives — Handles high‑frequency regenerative voltages and rapid charge–discharge cycles typical in servo motor power stages.
• General inverters — Provides bulk energy buffering and ripple management for inverter DC link and regenerative functions.
• Voltage‑doubler rectifier circuits — Suited for rectifier topologies and voltage‑doubler circuits that require high voltage rating and stable capacitance under stress.
• Equipment in fluctuating‑voltage environments — Designed for systems exposed to wide or rapidly changing supply voltages where robust endurance and leakage characteristics are required.

Unique Advantages

• High thermal endurance: Rated to +105°C with a defined 3000‑hour life at that temperature to support sustained high‑temperature operation.
• Proven charge–discharge durability: Endurance validated for 50 million charge–discharge cycles, keeping capacitance and leakage within specified limits after cycling.
• Frequency‑aware ripple capability: Ripple current ratings at both 120 Hz and 50 kHz enable predictable performance across low and high frequency operating regimes.
• Predictable leakage behavior: Leakage current governed by the I ≤ 3√(C·V) formula for straightforward design margin calculations.
• Robust mechanical mounting: Snap‑in radial can simplifies secure installation in power electronics assemblies.
• RoHS compliant: Meets current RoHS directives for restricted substances.

Why Choose LQS2V471MELC30?

The LQS2V471MELC30 delivers a combination of high voltage (350 V), substantial capacitance (470 µF), and a snap‑in package optimized for power‑electronics applications that demand reliable high‑speed charge–discharge performance. Its rated operating range (−25°C to +105°C), defined ripple current values, and explicit endurance and leakage specifications make it suitable for inverter, servo, and rectifier designs where predictable long‑term behavior is required.

As part of Nichicon's LQS series, this capacitor provides engineers with clearly defined electrical and mechanical parameters to simplify integration and lifetime planning in systems exposed to regenerative voltages and fluctuating supplies.

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