LQR2W821MSEC

The Nichicon LQR2W821MSEC is a screw-terminal aluminum electrolytic capacitor delivering 820 µF capacitance at a 450 V rating. It is part of the LQR series and is engineered for high-speed charge–discharge environments and robust power-conditioning roles.

Suited to applications such as inverters, AC servomotor regenerative circuits and equipment operating in voltage-fluctuating environments, this radial can capacitor provides high-voltage energy storage with a compact φ35 × 110 mm form and screw-terminal mounting for secure connections.

Key Features

• Capacitance & Voltage: 820 µF nominal capacitance at 450 V rated voltage, with a tolerance of ±20% (measured at 120 Hz, 20°C).
• High-speed charge–discharge design: LQR series construction optimized for high-frequency regenerative voltage and rapid charge–discharge cycles.
• Power handling / Ripple capability: Rated ripple current of 3.9 A at 120 Hz and 5.46 A at 100 kHz, supporting AC and high-frequency load conditions.
• Loss characteristics: Tangent of loss angle (tan δ) of 0.15 (measured at 20°C, 120 Hz), enabling predictable dissipation behavior.
• Endurance: Rated endurance of 5000 hours at 85°C when subjected to D.C. bias plus rated ripple current; meets specified post-test limits for capacitance, tan δ and leakage.
• Charge–discharge durability: Series-level qualification for charge–discharge endurance (20 million cycles, ΔV = rated voltage × 0.3, 3 Hz) without significant degradation.
• Leakage current specification: After 5 minutes’ application of rated voltage, leakage current does not exceed 3√V (µA) or 5 mA, whichever is smaller (at 20°C).
• Operating environment: Rated for −25°C to +85°C; RoHS compliant.
• Package & mounting: Radial can with screw terminals (φ35 screw-terminal type) and dimensions approximately 11.0 × 3.5 cm (L × D), supplied in cardboard packing.

Typical Applications

• AC servomotor regenerative circuits: Provides high-voltage energy buffering and rapid charge–discharge capability for regenerative events in servo drives.
• Inverter power stages: Supports voltage smoothing and energy storage in general inverter designs exposed to fluctuating line or load voltages.
• Voltage-doubler rectifier circuits: Suitable for rectifier and voltage-doubling topologies where high DC voltage storage and reliability are required.
• Voltage-fluctuation tolerant equipment: Used where equipment experiences frequent voltage variation and requires stable high-voltage capacitance and ripple handling.

Unique Advantages

• High-voltage energy storage: 450 V rating combined with 820 µF capacitance supplies substantial stored energy for power conditioning tasks.
• Screw-terminal reliability: Screw-terminal mounting provides secure, low-resistance connections suitable for high-current ripple paths.
• Designed for fast charge–discharge: LQR series construction targets high-frequency regenerative and rapid cycling use cases to maintain performance under dynamic loads.
• Long endurance at elevated temperature: 5000-hour rated life at 85°C under rated conditions supports sustained operation in demanding thermal environments.
• Predictable electrical behavior: Specified tan δ and leakage current limits enable predictable dissipation and leakage budgeting in designs.
• Regulatory compliance: RoHS compliant, aligning with restricted-substance requirements.

Why Choose LQR2W821MSEC?

The Nichicon LQR2W821MSEC positions itself as a robust, high-voltage aluminum electrolytic solution for engineers needing dependable energy storage and ripple capability in power-conversion systems. With 820 µF at 450 V, specified tan δ, defined leakage limits and 5000-hour endurance at 85°C, it is well-suited to inverter, servo and rectifier designs that demand predictable electrical performance and charge–discharge durability.

This part is appropriate for design teams seeking a screw-terminal radial can capacitor from the LQR family—delivering measurable specifications for ripple current, temperature range and long-term endurance to support reliable system operation.

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