LQS2V331MELB30

The LQS2V331MELB30 is a snap‑in terminal aluminum electrolytic capacitor from Nichicon's LQS series. It provides 330 µF capacitance at a 350 V rating in a φ30 × 30 mm can, configured for high‑speed charge/discharge and regenerative applications.

Designed for industrial power electronics, this capacitor is suited to AC servomotor drives, general inverters, voltage‑doubler rectifier circuits and equipment operating in fluctuating voltage environments, while meeting RoHS requirements.

Key Features

• Capacitance & Voltage: 330 µF rated capacitance at 350 V, with capacitance tolerance ±20% (120 Hz, 20°C).
• Snap‑in Terminal Package: Radial can with snap‑in mounting for robust mechanical retention in power assemblies; physical size approximately φ30 × 30 mm (L: 3 × D: 3 cm).
• High‑speed charge/discharge endurance: Series qualification includes charge/discharge endurance testing up to 50 million cycles (cycle 6 Hz, voltage difference = rated voltage + 0.35 V) at room temperature, maintaining capacitance within ±20% of initial value.
• High temperature and long life: Rated for operation from –25°C to +105°C with endurance of 3000 hours at 105°C under rated bias plus ripple current.
• Ripple current capability: Specified ripple current of 1.2 A at 120 Hz and 1.716 A at 50 kHz for handling AC ripple in power conversion applications.
• Electrical reliability parameters: Leakage current specified by I ≤ 3√(C·V) μA after 5 minutes at 20°C; tangent of loss angle (tan δ) max. 0.15 at 350 V (measured at 120 Hz, 20°C).
• Polarized design: Polarized aluminum electrolytic construction for DC and power‑electronics circuits.
• RoHS compliant: Meets RoHS directive (2011/65/EU, (EU)2015/863) requirements.

Typical Applications

• AC servo and motor drives: Handles high‑frequency regenerative voltage and frequent charge/discharge cycles common in servo inverters.
• General inverters and power converters: Provides energy buffering and ripple smoothing in inverter DC bus and intermediate circuits.
• Voltage‑doubler rectifier circuits: Suitable for rectifier configurations that require high DC voltage capacitors in compact snap‑in packages.
• Industrial equipment in fluctuating voltage areas: Built for systems exposed to variable input voltages where robust endurance and temperature performance are required.

Unique Advantages

• Designed for regenerative loads: Proven charge/discharge endurance (50 million cycles) minimizes downtime in applications with frequent energy recovery.
• High voltage capability: 350 V rating enables use in a wide range of power conversion topologies without series stacking.
• Compact snap‑in form factor: φ30 × 30 mm can with snap‑in terminals simplifies mechanical installation and board retention in power assemblies.
• High temperature endurance: 3000 hours at 105°C under rated conditions supports reliability in hot industrial environments.
• Verified ripple handling: Specified ripple current at both low and high frequency (120 Hz and 50 kHz) helps ensure stable DC bus performance across switching regimes.

Why Choose LQS2V331MELB30?

The LQS2V331MELB30 combines a high 350 V rating, substantial 330 µF capacitance and a snap‑in package engineered for high‑speed charge/discharge duty. Its specification set — including 105°C operation, 3000‑hour endurance, defined ripple current ratings and series charge/discharge qualification — makes it a practical choice for engineers specifying capacitors for inverter and regenerative power systems.

Manufactured by Nichicon as part of the LQS series and compliant with RoHS directives, this capacitor is suited to designers and procurement teams targeting reliable, specifiable components for industrial power electronics and variable‑voltage equipment.

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