LQR2G123MSEJBB

The LQR2G123MSEJBB is an aluminum electrolytic capacitor in a screw-terminal radial can designed for power electronics applications. It provides 12,000 µF nominal capacitance at a 400 V rated voltage and is part of Nichicon's LQR series optimized for high-speed charge–discharge environments.

Engineered for use in AC servomotor regenerative circuits, general inverters, voltage-doubler rectifiers and other equipment exposed to fluctuating voltages, this capacitor delivers high ripple-current capability and extended endurance at elevated operating temperatures while meeting RoHS requirements.

Key Features

• High Capacitance / Voltage — 12,000 µF nominal capacitance with a 400 V rated voltage for bulk energy storage in power electronic systems.
• Screw Terminal Mounting — Radial can with screw terminals for secure, low-resistance connections in high-current assemblies.
• High Ripple Current Capability — Rated ripple current of 37.6 A at 120 Hz and 52.64 A at 10 kHz to support high-frequency and regenerative loads.
• Wide Operating Temperature Range — Specified for -25 °C to +85 °C operation with endurance characterized at 85 °C.
• Durability and Endurance — Rated endurance of 5,000 hours at 85 °C under DC bias plus rated ripple current; charge–discharge endurance tested to 20 million cycles (ΔV = rated × 0.3, 3 Hz).
• Electrical Stability — Capacitance tolerance ±20% (120 Hz, 20 °C) and leakage current limits defined (after 5 minutes ≤ 3√V µA or 5 mA, whichever is smaller).
• Low-Temperature Impedance — Impedance ratio Z(-25 °C)/Z(+20 °C) specified as 8, maintaining performance in cooler environments.
• Regulatory Compliance — RoHS compliant (2011/65/EU, (EU)2015/863).

Typical Applications

• AC Servomotor Regenerative Circuits — Provides bulk energy buffering and high-frequency charge/discharge capability required for regenerative braking and energy capture.
• Inverter Power Stages — Supports general inverter DC bus filtering and transient energy demands in motor drives and industrial inverters.
• Voltage-Doubler Rectifiers — Suited for rectifier circuits using voltage-doubler configurations where reliable high-voltage capacitance is required.
• Equipment in Fluctuating-Voltage Environments — Designed to tolerate voltage variations while maintaining capacitance and leakage specifications.

Unique Advantages

• Large energy storage density: 12,000 µF at 400 V provides substantial bulk capacitance for DC bus stabilization and transient support.
• Designed for high-frequency operation: High ripple-current ratings at both 120 Hz and 10 kHz make it suitable for regenerative and high-speed switching environments.
• Proven thermal endurance: 5,000 hours at 85 °C under rated conditions demonstrates long-term stability in elevated-temperature applications.
• Robust charge–discharge cycling: Verified to withstand 20 million charge–discharge cycles (ΔV = 0.3 × rated), reducing replacement frequency in cycling applications.
• Secure, serviceable connections: Screw-terminal radial can package enables reliable mechanical and electrical connections in high-current assemblies.
• Regulatory compliance: RoHS conformity supports deployment in regions requiring restricted-substance compliance.

Why Choose LQR2G123MSEJBB?

The LQR2G123MSEJBB combines high capacitance and high-voltage capability with screw-terminal robustness, making it well suited for industrial power electronics where regenerative energy handling, high ripple currents and long-term endurance are required. As a member of the Nichicon LQR series, it is specified for sustained performance at elevated temperatures and for demanding charge–discharge duty cycles.

This capacitor is ideal for designers of inverters, motor drives, and rectifier circuits who require reliable bulk energy storage, secure field wiring, and documented endurance and ripple-current specifications to inform thermal and reliability margins.

Request a quote or contact sales to discuss availability, lead times and pricing for the LQR2G123MSEJBB.