LQR2W123MSEJBB

The LQR2W123MSEJBB is a high-capacitance aluminum electrolytic capacitor in a screw-terminal radial-can package, part of Nichicon's LQR series. It provides 12,000 µF nominal capacitance at a 450 V rating and is designed for power-electronics environments that demand high ripple handling and long-term endurance.

This part is suited to high-frequency regenerative voltage applications such as AC servomotor drives and general inverters, equipment operating in areas with fluctuating line voltage, and rectifier circuits including voltage-doubler topologies. Key value drivers include its high ripple-current capability, low ESR at high frequency, and defined endurance characteristics.

Key Features

• Capacitance and Voltage — 12,000 µF nominal capacitance with a 450 V rated voltage and capacitance tolerance of ±20% (measured at 120 Hz, 20°C).
• Low ESR and High ripple capability — Equivalent series resistance of 3.4 mΩ at 100 kHz; rated ripple current of 49.7 A at 100 kHz and 35.5 A at 120 Hz to support high-frequency regenerative duty.
• Endurance and charge–discharge durability — Rated lifetime of 5,000 hours at 85°C with DC bias plus rated ripple current. Charge–discharge endurance tested to 20 million cycles (ΔV = rated × 0.3, 3 Hz) with limits on capacitance, tan δ, and leakage current preserved.
• Operating temperature range — Specified for operation from −25°C to +85°C.
• Screw-terminal radial can package — Screw terminal mounting offers secure electrical and mechanical connections for industrial power assemblies.
• Leakage current specification — After 5 minutes at rated voltage, leakage current is limited to ≤ 3√(V) µA or 5 mA (whichever is smaller) at 20°C, providing predictable power loss characteristics.
• RoHS compliance — Compliant with the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• AC servomotor drives — Energy buffering and regenerative-voltage handling in servo inverters and motor-control DC-link circuits.
• General inverters — DC-link smoothing and ripple management in inverter power stacks, especially where voltage fluctuations occur.
• Voltage-doubler rectifier circuits — Suited for rectifier stages that use voltage-doubler topologies for higher DC-link voltages.

Unique Advantages

• High-voltage capability: 450 V rating enables use in elevated DC-link and regenerative circuits.
• High-frequency performance: Low ESR (3.4 mΩ at 100 kHz) combined with high ripple-current ratings supports efficient handling of high-frequency switching currents.
• Long-term reliability: 5,000 hours at 85°C endurance plus charge–discharge qualification to 20 million cycles helps ensure stable performance in continuous-duty industrial applications.
• Secure, serviceable connections: Screw terminals simplify installation and provide robust electrical connections for maintenance and field service.
• Predictable leakage behavior: Defined leakage current limits after voltage application help designers estimate standby and loss currents.
• Regulatory conformity: RoHS compliance supports environmentally constrained procurement requirements.

Why Choose LQR2W123MSEJBB?

LQR2W123MSEJBB combines high capacitance and a 450 V rating with low high-frequency ESR and robust ripple-current capability, making it well suited for inverter, servo, and rectifier DC-link applications that experience high-frequency regenerative currents and voltage fluctuations. Its endurance specifications and charge–discharge qualification provide measurable reliability for continuous-duty industrial systems.

As a Nichicon LQR series screw-terminal capacitor, it addresses the needs of engineers designing industrial power electronics who require predictable leakage behavior, secure screw-terminal connections, and components rated for extended operation at elevated temperatures.

If you would like pricing or availability, request a quote or contact sales to submit your requirements and receive a formal quote for LQR2W123MSEJBB.