LQSW6121MELZ30

The LQSW6121MELZ30 from Nichicon is a snap‑in terminal aluminum electrolytic capacitor designed for high‑speed charge‑discharge and high frequency regenerative environments. It is a polarized, radial can (snap‑in) capacitor specified at 120 µF and 420 V, optimized for power electronics applications that experience voltage fluctuation and frequent charge cycles.

This capacitor addresses needs in industrial inverter and servo systems by combining high temperature capability (–25 °C to 105 °C), extended endurance at elevated temperature, and measurable ripple handling for both low and high frequency operation.

Key Features

• Snap‑In Terminal Package Robust radial can with snap‑in mounting for secure chassis or board installation in power assemblies.
• High Rated Voltage 420 V rated voltage suitable for inverter and rectifier circuits, including use in voltage doubler rectifier configurations.
• 120 µF Capacitance, ±20% Tolerance Provides energy storage and smoothing with a specified tolerance of −20% to +20% at 120 Hz, 20 °C.
• High Temperature Operation Operating range −25 °C to +105 °C and qualified for 3,000 hours at 105 °C under rated conditions.
• High Speed Charge‑Discharge Endurance Designed for charge‑discharge behavior; series endurance testing includes 50 million cycles at room temperature (cycle conditions specified by the series) with capacitance change within ±20%.
• Ripple Current Performance Rated ripple: 810 mA at 120 Hz and 1.158 A at 50 kHz, enabling use in both low‑ and high‑frequency power circuits.
• Leakage and Dissipation Characteristics Leakage current specification: I ≤ 3√(C·V) (µA) after 5 minutes at 20 °C; tan δ at 120 Hz and 20 °C is specified (max. 0.15 at 420 V).
• RoHS Compliant Meets RoHS directive requirements (2011/65/EU, (EU)2015/863), suitable for regulated markets.

Typical Applications

• AC Servo and Motor Drives Supports high frequency regenerative voltage environments found in AC servomotor control and feedback systems.
• General Inverters Used in inverter DC bus and smoothing stages where voltage fluctuates and rapid charge‑discharge is required.
• Rectifier and Voltage Doubler Circuits Suited for rectifier circuits including voltage doubler topologies where higher DC blocking voltage and energy buffering are required.
• Industrial Power Electronics Applicable to equipment operating in voltage‑fluctuating areas that require stable capacitance and long life at elevated temperatures.

Unique Advantages

• Engineered for High‑Frequency Regeneration: Series design targets high frequency regenerative voltages typical in servo and inverter systems, providing dependable performance under repetitive charge cycles.
• Wide Temperature Capability: Rated for −25 °C to +105 °C with 3,000 hours endurance at 105 °C, enabling deployment in hot industrial environments.
• Measured Ripple Handling: Specified ripple currents at both 120 Hz and 50 kHz make it practical for mixed‑frequency power stages without guesswork on allowable stress.
• Quantified Endurance and Stability: Series endurance data (50 million charge‑discharge cycles and defined end‑of‑test limits) gives predictable life and performance margins for system design.
• Secure Snap‑In Mounting: Snap‑in terminals provide mechanical stability for installations subject to vibration or handling during assembly.
• Regulatory Compliance: RoHS compliance supports use in regulated product lines and simplifies environmental documentation.

Why Choose LQSW6121MELZ30?

The LQSW6121MELZ30 positions itself as a practical power electronics capacitor for designers needing reliable high‑voltage energy storage with high speed charge‑discharge capability. Its 420 V rating, 120 µF capacitance, and specified ripple performance make it well suited to inverter, servo drive, and rectifier applications where voltage fluctuations and regenerative events are common.

With defined endurance at elevated temperature, series‑level charge‑discharge validation, and RoHS compliance from Nichicon, this capacitor delivers predictable performance and lifecycle characteristics for industrial power systems and other demanding use cases.

If you would like pricing, availability, or support for integration into your design, request a quote or contact sales with your project details and quantity requirements.