LQR2W122MSEF

The LQR2W122MSEF is a screw-terminal aluminum electrolytic capacitor from Nichicon’s LQR series, specified at 1.2 mF (1200 µF) and 450 V. It is a radial can with screw terminals designed for high-speed charge–discharge environments and applications with fluctuating voltages.

This part is targeted at industrial power systems that require high-voltage energy storage and robust charge–discharge performance, such as AC servomotor regenerative circuits, general inverters, and rectifier circuits using voltage doublers.

Key Features

• Capacitance & Rated Voltage — 1.2 mF (1200 µF) nominal capacitance at a rated voltage of 450 V with a tolerance of ±20% (measured at 120 Hz, 20°C).
• Screw Terminal, Radial Can Package — Screw-terminal mounting provides secure, low-resistance bolted connections suited for industrial assemblies; package dimensions are L: 8 × D: 5.1 cm.
• High-speed Charge–Discharge Design — Engineered for high-frequency regenerative voltage and rapid charge–discharge cycles; specified as 85°C high speed charge–discharge performance.
• Ripple Current Capability — Rated ripple current of 5.2 A at 120 Hz and 7.28 A at 10 kHz for handling AC components in power circuits.
• Operating Temperature & Endurance — Operational range from −25°C to +85°C with endurance rated to 5000 hours at 85°C under DC bias plus rated ripple current.
• Charge–Discharge Endurance — Specified to withstand 20 million charge–discharge cycles (ΔV = rated voltage × 0.3, 3 Hz) while meeting capacitance, tan δ and leakage current criteria.
• Low-temperature Performance — Impedance stability at low temperature with Z(−25°C)/Z(+20°C) ≤ 8.
• Leakage Current Specification — After 5 minutes at rated voltage, leakage current is specified as not more than 3√(V) μA or 5 mA, whichever is smaller (at 20°C).
• Environmental Compliance — Compliant with RoHS Directive (2011/65/EU, (EU)2015/863).

Typical Applications

• AC Servomotor Regenerative Circuits — Handles high-frequency regenerative voltage during braking and energy recovery in motor drives.
• General Inverters — Provides high-voltage energy storage and ripple smoothing for inverter DC-link stages in industrial drives.
• Voltage Doubler Rectifier Circuits — Suitable for rectifier stages that use voltage-doubling topologies where stable high-voltage capacitance is required.
• Equipment in Voltage-Fluctuating Environments — Designed for systems exposed to fluctuating supply voltages that demand robust charge–discharge performance.

Unique Advantages

• High-voltage capability: 450 V rating supports demanding DC-link and regenerative applications without series stacking.
• Robust ripple handling: Specified ripple currents at 120 Hz and 10 kHz accommodate both low- and high-frequency AC components common in power electronics.
• Durable operational life: 5000 hours endurance at 85°C and charge–discharge endurance testing (20 million cycles) provide measurable longevity for industrial use.
• Screw-terminal mounting: Provides secure, mechanically robust connections suitable for high-current wiring and serviceability in the field.
• Low-temperature impedance stability: Maintains usable impedance characteristics down to −25°C, supporting wide ambient operating conditions.
• RoHS compliance: Meets the stated RoHS directives for environmental and regulatory alignment.

Why Choose LQR2W122MSEF?

LQR2W122MSEF is positioned for industrial power-electronics designs that require a high-voltage, high-capacitance electrolytic capacitor with proven charge–discharge endurance and ripple-handling capability. Its screw-terminal radial can package and measurable endurance ratings make it suitable for inverter DC-link, regenerative braking systems, and rectifier stages exposed to voltage fluctuations.

Engineered as part of the Nichicon LQR series, this capacitor delivers specified performance metrics (capacitance, ripple current, temperature range, and endurance) that help designers assess lifetime and reliability for long-running industrial applications.

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