LQR2W472MSEH

The LQR2W472MSEH is a screw-terminal, aluminum electrolytic capacitor in Nichicon's LQR series designed for high-speed charge–discharge applications. This polarized, radial can capacitor provides 4700 µF (4.7 mF) capacitance at a 450 V rating with an operating temperature range of −25 °C to 85 °C.

It is intended for power-electronics applications that require high-frequency regenerative voltage handling and robust ripple performance, such as AC servomotor drives, general inverters, voltage-doubler rectifiers and equipment operating in voltage-fluctuating environments. The part is RoHS compliant.

Key Features

• Capacitance & Voltage — 4700 µF nominal capacitance with a 450 V rated voltage and ±20% tolerance at 120 Hz, 20 °C.
• High-speed charge–discharge design — Built for repeated charge–discharge cycles; datasheet endurance test specifies performance after 20 million cycles (ΔV = rated voltage × 0.3, 3 Hz) at room temperature.
• Ripple current capability — Rated ripple current of 16.3 A at 120 Hz and 22.82 A at 10 kHz supports high-frequency and low-frequency ripple demands in inverter and regenerative systems.
• Temperature & endurance — Operates from −25 °C to +85 °C with an endurance rating of 5000 hours at 85 °C under DC bias plus rated ripple current.
• Leakage current specification — After 5 minutes’ application of rated voltage, leakage current is limited to 3√(V) µA or 5 mA, whichever is smaller (at 20 °C), per datasheet.
• Package & mounting — Radial can with screw terminals for secure mechanical and electrical connections; physical size L: 13 cm × D: 7.62 cm and seated height up to 5.118 inch.
• Regulatory — 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 encountered in servo systems.
• General inverters — Provides energy buffering and ripple handling for inverter DC-link and regenerative circuits.
• Voltage-doubler rectifier circuits — Suited for rectifier circuits using voltage-doubler topologies where stable high-voltage capacitance is required.
• Equipment in voltage-fluctuating environments — Designed for systems subject to frequent voltage variation, providing endurance and leakage characteristics appropriate for such conditions.

Unique Advantages

• High-voltage capability: 450 V rating enables use in high-voltage DC-link and rectifier applications without series stacking.
• Large energy storage in a screw-terminal package: 4700 µF capacitance offers substantial energy buffering while providing robust mechanical attachment through screw terminals.
• Dual-frequency ripple performance: Explicit ripple current ratings at 120 Hz and 10 kHz allow designers to assess performance across low- and high-frequency domains.
• Proven endurance under stress: Specified endurance of 5000 hours at 85 °C under DC bias plus rated ripple current, and validated charge–discharge endurance (20 million cycles at ΔV = 0.3×V), support long-term reliability in demanding power applications.
• predictable leakage behavior: Leakage current limits after initial voltage application help with system-level power-loss budgeting and safety assessments.

Why Choose LQR2W472MSEH?

The LQR2W472MSEH combines high capacitance and a 450 V rating with screw-terminal robustness and high-speed charge–discharge capability, making it suitable for inverter, servo and regenerative power designs that demand reliable energy storage and ripple handling. Its endurance and specified leakage behavior provide measurable, application-relevant performance metrics useful for system design and qualification.

This part is a fit for engineers and procurement teams specifying capacitors for high-frequency regenerative circuits, voltage-doubler rectifiers and equipment operating in voltage-fluctuating environments who require documented endurance and ripple current data from a known capacitor family.

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