LQSW6561MELC45

The LQSW6561MELC45 is a Nichicon LQS series aluminum electrolytic capacitor in a snap‑in radial can package, designed for high‑speed charge–discharge applications. It delivers 560 µF capacitance at a 420 V rating with polarized terminals and snap‑in mounting for secure PCB installation.

Engineered for inverter and motor drive environments, this capacitor is suited to high‑frequency regenerative voltages (AC servomotor, general inverter), equipment operating in fluctuating voltage areas, and rectifier circuits such as voltage doublers. Key differentiators include 105°C rated operation, high ripple handling, and endurance under repeated charge–discharge cycles.

Key Features

• Electrical Rating — 560 µF nominal capacitance at 420 V DC with capacitance tolerance ±20% (measured at 120 Hz, 20°C).
• High‑Temperature Operation — Rated operating temperature range from −25°C to +105°C for sustained performance in elevated ambient conditions.
• High Speed Charge–Discharge Endurance — Series specification for charge–discharge endurance: after 50 million cycles (6 Hz, charge–discharge voltage δV = rated voltage + 0.35) the capacitance change remains within ±20% and leakage/tan δ remain within specified limits.
• Long Life at Elevated Temperature — Designed for 3000 hours at 105°C with DC bias plus rated ripple current applied, meeting endurance characteristics for capacitance, tan δ and leakage current.
• Ripple Current Capability — Rated ripple current 2.1 A at 120 Hz and 3.003 A at 50 kHz, supporting both low‑frequency and high‑frequency inverter/regenerative loads.
• Leakage & Loss Characteristics — Leakage current defined by I ≤ 3√(C·V) µA after 5 minutes at 20°C; tan δ (max.) 0.15 at 420 V (measured at 120 Hz, 20°C) for predictable dissipation behavior.
• Package & Mounting — Radial can with snap‑in terminals for reliable mechanical retention in power electronics assemblies; physical size L: 4.5 × D: 3.5 cm for board planning.
• RoHS Compliance — Conforms to RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• Industrial Inverters and Drives — Supports high‑frequency regenerative voltages in general inverter and AC servomotor systems where robust charge–discharge capability is required.
• Motor Control Electronics — Used in DC link and energy buffering applications to tolerate voltage fluctuation and regenerative events in motor controllers.
• Rectifier and Power Conversion — Suitable for rectifier circuits including voltage doubler topologies that require stable high‑voltage capacitance and ripple handling.

Unique Advantages

• High‑Voltage, High‑Capacitance Combination — 420 V rated voltage combined with 560 µF capacitance provides substantial energy storage for power conversion stages without exceeding specified limits.
• Designed for Repetitive Stress — Specified endurance for 50 million charge–discharge cycles supports designs exposed to frequent regenerative events and cycling.
• Thermal Reliability — 105°C rated operation and a 3000‑hour endurance at 105°C give designers confidence for sustained high‑temperature deployments.
• Dual‑Band Ripple Performance — Specified ripple current at both 120 Hz and 50 kHz addresses requirements across low and high frequency switching environments.
• Secure Snap‑In Mounting — Snap‑in terminals simplify assembly and offer reliable mechanical retention for rugged power electronics assemblies.
• Standards Compliance — RoHS conformity supports environmental and regulatory requirements for commercial and industrial equipment.

Why Choose LQSW6561MELC45?

LQSW6561MELC45 is positioned for engineers building inverter, motor drive and power conversion systems that require a high‑voltage aluminum electrolytic capacitor with strong charge–discharge endurance, elevated temperature capability, and solid ripple handling. Its combination of 420 V rating, 560 µF capacitance, snap‑in package, and series‑level endurance data make it a practical choice for designs exposed to regenerative currents and voltage fluctuations.

This part is suited for teams focused on reliability and predictable long‑term behavior in demanding power electronics. Using a component with defined leakage, tan δ, and lifecycle characteristics helps simplify validation and supports robust system lifetimes.

Request a quote or submit a quotation request to evaluate LQSW6561MELC45 for your next power electronics design.