LQSW6221MELZ45

The LQSW6221MELZ45 is a Nichicon LQS series snap‑in aluminum electrolytic capacitor specified at 220 µF and 420 V, designed for high‑temperature, high‑frequency power applications. It is a polarized, radial can (snap‑in) capacitor engineered for robust charge–discharge performance up to 105°C.

This part is suited for power systems that require reliable handling of regenerative or fluctuating voltages—typical targets include AC servomotor regenerative circuits, general inverters, and rectifier configurations such as voltage doublers. Key value comes from its high‑temperature endurance, high‑speed charge–discharge capability, and defined ripple current performance across low and high frequency conditions.

Key Features

• Capacitance and Voltage: 220 µF rated capacitance at 420 V, with a tolerance of ±20% (measured at 120 Hz, 20°C).
• High‑Temperature Operation: Rated for continuous operation from −25°C to +105°C with a rated lifetime of 3000 hours at 105°C under specified DC bias and ripple conditions.
• High‑Speed Charge–Discharge Endurance: Engineered to withstand 50 million charge–discharge cycles (6 Hz, charge–discharge voltage = rated voltage + 0.35 V) with capacitance change within ±20% and leakage/tan δ within specified limits.
• Ripple Current Performance: Specified ripple current of 1.05 A at 120 Hz (low frequency) and 1.502 A at 50 kHz (high frequency) to support inverter and regenerative loads.
• Leakage and Loss Characteristics: Leakage current meets I ≤ 3√(C·V) µA (after 5 minutes at 20°C). Tangent of loss angle (tan δ) for 420 V is specified with a maximum of 0.15 (measured at 120 Hz, 20°C).
• Low‑Temperature Stability: Impedance stability specified with Z(−25°C)/Z(+20°C) ≤ 8 (measurement frequency 120 Hz) across rated voltages 350–450 V.
• Mounting & Package: Snap‑in terminal, radial can package for secure panel or chassis mounting in power assemblies.
• Physical Size: Body dimensions provided as L: 4.5 × D: 2.2 cm for layout and mechanical planning.
• Environmental Compliance: RoHS compliant (2011/65/EU, (EU)2015/863).

Typical Applications

• AC servomotor regenerative systems: Handles high‑frequency regenerative voltages and repeated charge–discharge cycles typical in servo drives.
• General inverters: Suitable for DC bus and energy buffering in inverter topologies where high voltage and elevated temperature endurance are required.
• Voltage‑doubler rectifier circuits: Designed for use in rectifier sections of voltage doubler configurations handling fluctuating input voltages.
• Equipment operating in voltage‑fluctuating environments: Provides stable capacitance and controlled leakage under fluctuating AC/DC conditions.

Unique Advantages

• High‑temperature reliability: Rated to 105°C with a specified 3000‑hour endurance at that temperature, enabling deployment in thermally demanding power electronics.
• Designed for high cycle life: Validated for 50 million charge–discharge cycles with controlled capacitance drift and leakage behavior, supporting long service intervals in cyclic systems.
• Dual‑frequency ripple capability: Ripple specifications at both 120 Hz and 50 kHz allow predictable performance across AC mains and switching frequencies.
• Measurable loss and leakage limits: Tangent of loss angle and leakage current are specified (tan δ ≤ 0.15 at 420 V; I ≤ 3√CV µA), aiding thermal and leakage budgeting in designs.
• Snap‑in mounting robustness: Radial snap‑in can simplifies mechanical retention in power assemblies while providing a stable electrical connection.
• RoHS compliance: Meets applicable RoHS directives, supporting regulatory requirements for commercial and industrial equipment.

Why Choose LQSW6221MELZ45?

The LQSW6221MELZ45 from Nichicon’s LQS series combines high voltage (420 V), elevated temperature capability (−25°C to +105°C), and proven charge–discharge endurance for power systems that experience regenerative energy and fluctuating voltages. Its defined ripple current ratings and loss/leakage specifications make it straightforward to integrate into inverter DC buses, servo drive circuits, and rectifier stages where predictable electrical behavior is required.

This part is intended for designers and procurement teams building robust industrial power electronics who need a high‑voltage electrolytic capacitor with documented endurance, thermal performance, and regulatory compliance. Its combination of mechanical snap‑in packaging and clear electrical limits supports reliable, serviceable system designs.

If you would like pricing, availability, or a formal quote for LQSW6221MELZ45, please submit a request to sales specifying part number and quantity, and our team will respond with the information you need.