LQS2W471MELC45

The LQS2W471MELC45 is a snap-in terminal aluminum electrolytic capacitor from Nichicon’s LQS series, designed for high-speed charge–discharge operation at elevated temperatures. It provides 470 µF capacitance at a 450 V rating and is polarized for DC applications.

Engineered for power electronics environments, this capacitor is suited to high-frequency regenerative voltages, general inverters and AC servomotor systems, equipment operating in voltage-fluctuating areas, and rectifier circuits such as voltage doublers. It is RoHS compliant and rated for operation up to 105°C.

Key Features

• Rated Capacitance and Voltage — 470 µF nominal capacitance at a 450 V rated voltage, with tolerance ±20% (measured at 120 Hz, 20°C).
• High-Temperature Operation — Category temperature range −25°C to +105°C and endurance specified for 3000 hours at 105°C under DC bias plus rated ripple current.
• High-Speed Charge–Discharge Capability — Designed for high-speed charge–discharge applications; endurance validated for 50 million charge–discharge cycles (cycle: 6 Hz, charge–discharge voltage = rated voltage + 0.35 V) at room temperature with defined post-test acceptance criteria.
• Ripple Current Ratings — Rated ripple current of 1.78 A at 120 Hz and 2.545 A at 50 kHz, suitable for both low- and high-frequency ripple environments.
• Electrical Stability Metrics — Leakage current specified as I ≤ 3√(C·V) µA after 5 minutes at 20°C; tangent of loss angle (tan δ) limit for 450 V is 0.20 (measured at 120 Hz, 20°C).
• Low-Temperature Stability — Impedance ratio Z(−25°C)/Z(+20°C) up to 8 across the 350–450 V range (measured at 120 Hz), supporting performance in cooler ambient conditions.
• Mechanical and Mounting — Snap-in radial can package for secure board mounting; physical size L: 4.5 × D: 3.5 cm and polarized construction for DC circuits.
• Environmental Compliance — Compliant to the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• AC Servomotor Regeneration — Handles high-frequency regenerative voltages in servomotor drives to support energy capture and smoothing in the DC bus.
• General Inverters — Suited for inverter DC-link filtering where high-voltage rating, ripple capability, and thermal endurance are required.
• Voltage-Fluctuating Equipment — Designed for systems operating in environments with variable supply voltages where robust voltage tolerance and stability matter.
• Rectifier and Voltage Doubler Circuits — Appropriate for rectifier stages and voltage-doubler topologies that demand high-voltage capacitors with reliable charge–discharge behavior.

Unique Advantages

• High-Voltage, High-Capacitance Combination — 470 µF at 450 V provides substantial energy storage for DC-link and smoothing roles in medium- to high-voltage power electronics.
• Thermal Endurance — Rated for continuous operation up to 105°C with a 3000-hour endurance specification under rated stress, enabling deployment in thermally demanding systems.
• Proven Charge–Discharge Durability — Endurance-tested for 50 million charge–discharge cycles with specified limits for capacitance change, tan δ, and leakage current, helping ensure long-term performance in cyclic applications.
• Dual-Frequency Ripple Handling — Specified ripple currents at 120 Hz and 50 kHz support both mains-related and high-frequency switching environments.
• Secure Snap-In Mounting — Radial snap-in can package enables robust mechanical retention on power PCBs commonly used in industrial equipment.
• Regulatory Compliance — RoHS compliance supports use in designs targeting restricted-substance requirements.

Why Choose LQS2W471MELC45?

The LQS2W471MELC45 balances high-voltage energy storage with high-temperature and high-cycle endurance, making it well suited for industrial power electronics such as inverters, servomotors, and rectifier circuits. Its combination of 470 µF at 450 V, proven charge–discharge durability, and defined ripple ratings provides designers with a component that addresses both electrical and thermal reliability concerns.

As part of Nichicon’s LQS series, this snap-in aluminum electrolytic capacitor is targeted at engineers and procurement teams seeking a robust solution for DC-link and regenerative applications where voltage fluctuation and frequent cycling are expected. The clear electrical limits and environmental compliance facilitate specification and long-term system planning.

Request a quote or submit a specification inquiry for the LQS2W471MELC45 to receive pricing, lead-time and availability details tailored to your project needs.