LQR2W272MSEH

The LQR2W272MSEH is a screw-terminal aluminum electrolytic capacitor from Nichicon's LQR series, rated at 2.7 mF (2700 µF) and 450 V. It is designed for high-speed charge–discharge applications and energy buffering in systems subject to frequent voltage fluctuation.

Typical use cases include high-frequency regenerative voltage handling for AC servomotors and general inverters, as well as rectifier circuits such as voltage doubler configurations. The device is RoHS compliant and intended for demanding industrial power-electronics environments.

Key Features

• Capacitance and Voltage: 2.7 mF (2700 µF) nominal capacitance at a rated voltage of 450 V, with ±20% tolerance at 120 Hz, 20 °C.
• High-speed charge–discharge behavior: Engineered for fast charge–discharge cycles and validated by endurance testing (20 million charge–discharge cycles at ΔV = rated voltage × 0.3, 3 Hz cycle, room temperature).
• Ripple current capability: Rated ripple current performance of 10 A at 120 Hz (low frequency) and 14 A at 10 kHz (high frequency) to support regenerative and high-frequency inverter loads.
• Thermal and lifetime specifications: Operating temperature range −25 °C to +85 °C with endurance specified as 5000 hours at 85 °C under D.C. bias plus rated ripple current.
• Leakage and impedance characteristics: Leakage current specified after 5 minutes' application of rated voltage not to exceed 3√(V) µA or 5 mA (whichever is smaller) at 20 °C; impedance stability at low temperature with Z(−25 °C)/Z(+20 °C) ≤ 8.
• Mechanical and mounting: Screw-terminal radial can package with screw terminals for secure, low-inductance connections. Physical size: L: 8.00 cm × D: 7.62 cm, with a seated height maximum of 3.15 inches.
• Durability and standards: Endurance and shelf-life behavior meet the LQR series specifications for capacitance, tan δ, and leakage after specified aging and test procedures; RoHS compliant (2011/65/EU, (EU)2015/863).

Typical Applications

• AC servo drives / regenerative systems: Energy buffering and handling of high-frequency regenerative voltage in servo motor drives.
• General inverters and motor controllers: DC-link and smoothing use in inverter architectures where high-speed charge–discharge performance is required.
• Rectifier and voltage-doubler circuits: Suited for rectifier stages that employ voltage-doubler topologies and experience significant voltage fluctuation.
• Industrial equipment in fluctuating-voltage environments: Robust operation in systems exposed to frequent voltage changes or transient energy flows.

Unique Advantages

• High-voltage energy storage: 450 V rating with 2.7 mF capacitance provides substantial DC energy storage for power-electronics applications.
• Fast charge–discharge endurance: Validated endurance up to 20 million charge–discharge cycles under specified test conditions, supporting repeated regenerative events.
• Broad ripple handling: Specified ripple current at both low (120 Hz) and high (10 kHz) frequencies to accommodate a range of switching and regenerative loads.
• Thermal durability: Rated for continuous operation up to 85 °C with a 5000-hour endurance rating at that temperature, helping ensure long-term stability in industrial environments.
• Secure, serviceable connections: Screw-terminal radial can package simplifies installation and maintenance while providing reliable electrical contact.
• Regulatory compliance: RoHS compliant per the listed directives, supporting environmental and regulatory requirements.

Why Choose LQR2W272MSEH?

The LQR2W272MSEH delivers a combination of high-voltage capability, large capacitance and proven high-speed charge–discharge endurance tailored for inverter, servo drive, and rectifier applications. Its specified ripple current performance across low and high frequencies, secure screw-terminal mounting and defined lifetime at elevated temperature make it suitable for demanding industrial power-electronics designs.

Manufactured by Nichicon as part of the LQR series, this capacitor is aimed at engineers seeking a robust, serviceable energy-storage component for systems that experience frequent regenerative or fluctuating voltage events.

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