LQR2W472MSEHBB

The Nichicon LQR2W472MSEHBB is a high-capacitance, screw-terminal aluminum electrolytic capacitor rated at 4700 µF and 450 V. It is part of the LQR series designed for high-speed charge–discharge and high-frequency regenerative voltage applications.

Engineered for power electronics, the part addresses demanding inverter and servo-drive environments where large energy storage, high ripple handling, and long endurance at elevated temperature are required.

Key Features

• High Capacitance and Voltage: 4700 µF at 450 V nominal, providing substantial energy storage for power conversion and DC-link applications.
• Screw Terminal Mounting: Radial can with screw terminals (M5 bolt nominal for φ76.2 cases) for secure, low-impedance electrical and mechanical connections.
• Ripple Current Ratings: Specified ripple current of 16.3 A at 120 Hz and 22.82 A at 100 kHz to support continuous AC and high-frequency ripple conditions.
• Endurance and Charge–Discharge Durability: 5000 hours endurance at 85 °C under DC bias plus rated ripple current; qualified for 20 million charge–discharge cycles at room temperature with ΔV = rated × 0.3 (3 Hz).
• Leakage Current Specification: After 5 minutes at rated voltage, leakage is not more than 3√V (µA) or 5 mA, whichever is smaller (at 20 °C).
• Operating Temperature Range: Rated for −25 °C to +85 °C operation, with low-temperature impedance characteristics specified (Z(−25 °C)/Z(+20 °C) = 8 max.).
• Mechanical Footprint: Case diameter φ76.2 mm with length 130 mm (L: 13 × D: 7.62 cm), suitable for chassis-mounted power assemblies.
• Polarized, ±20% Tolerance: Polarized aluminum electrolytic with capacitance tolerance ±20% at 120 Hz, 20 °C.
• RoHS Compliant: Meets RoHS directive requirements.

Typical Applications

• Industrial Inverters and Servo Drives: Suited for high-frequency regenerative voltage and DC-link smoothing in AC servomotor and inverter power stages.
• Rectifier and Voltage Doubler Circuits: Designed for use in rectifier circuits where large capacitance and high voltage handling are required.
• Power Conversion Assemblies: Provides bulk energy storage and ripple filtering in converters and power-supply modules operating in voltage-fluctuating environments.

Unique Advantages

• High Energy Density at Elevated Voltage: 4700 µF at 450 V enables substantial DC-link energy storage in a single can-style package.
• Specified High- and Low-Frequency Ripple Handling: Explicit ripple current ratings at 120 Hz and 100 kHz allow designers to size capacitors against both mains-frequency and high-frequency switching ripple.
• Long-Term High-Temperature Endurance: 5000 hours at 85 °C under rated conditions supports robust operation in thermally stressed power systems.
• Proven Charge–Discharge Durability: Qualified for extended charge–discharge cycles (20 million cycles at room temperature, ΔV = rated × 0.3), making it suitable for frequent switching applications.
• Secure Screw-Terminal Connections: M5 screw terminals on the φ76.2 case enable reliable, low-resistance connections for high-current power paths.
• Clear Leakage and Impedance Specifications: Leakage current limits and low-temperature impedance ratio are published for predictable performance across environments.

Why Choose LQR2W472MSEHBB?

The LQR2W472MSEHBB combines high capacitance and high voltage in a screw-terminal aluminum electrolytic package tailored for demanding power-electronics use. With defined ripple current ratings at both low and high frequencies, explicit leakage and impedance specifications, and a 5000-hour endurance at 85 °C, it supports robust DC-link, regenerative, and rectifier applications in industrial equipment.

This part is appropriate for engineers designing inverter stages, servo drives, and other power conversion systems that require durable, high-energy capacitors with secure mechanical and electrical connections. The Nichicon LQR series documentation provides the technical limits and endurance characteristics needed for reliable design and long-term operation.

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