LQS2G561MELB50

The LQS2G561MELB50 is a snap‑in terminal aluminum electrolytic capacitor from Nichicon’s LQS series, designed for high‑speed charge–discharge applications. It delivers 560 µF capacitance at a 400 V rating in a radial can with snap‑in mounting, targeting power electronics where high frequency regenerative voltages and fluctuating line conditions are common.

Typical use cases include AC servomotor regenerative circuits, general inverter DC link and smoothing, and rectifier circuits such as voltage doublers. The part combines high operating temperature tolerance with tested endurance for demanding charge‑discharge cycles.

Key Features

• High voltage rating: 400 V rated voltage suitable for inverter and regenerative power stages within the LQS series voltage range (350–450 V).
• Capacitance and tolerance: 560 µF nominal capacitance with ±20% tolerance (measured at 120 Hz, 20 °C).
• High temperature capability: Operates across −25 °C to +105 °C and meets endurance requirements after 3000 hours at 105 °C when biased with rated ripple current.
• Charge–discharge durability: Engineered for high‑speed charge‑discharge performance; LQS series endurance testing includes 50 million charge–discharge cycles (6 Hz) with specified retention of electrical characteristics.
• Ripple current performance: Rated ripple current of 1.9 A at 120 Hz and 2.717 A at 50 kHz, supporting high‑frequency power applications.
• Snap‑in radial can package: Snap‑in terminals provide robust mechanical mounting for power assemblies and ease of installation on power distribution boards.
• RoHS compliant: Conforms to RoHS directive (2011/65/EU, (EU)2015/863).
• Leakage and dissipation: Leakage current meets series specification I ≤ 3√(C·V) μA (after 5 minutes at rated voltage, 20 °C); tangent of loss angle (tan δ) for 400 V is specified (max. 0.15 at 120 Hz, 20 °C).
• Compact footprint: Physical sizing approximately L: 5 cm × D: 3 cm for space‑conscious power assemblies.

Typical Applications

• AC servomotor regenerative circuits: Handles high‑frequency regenerative voltages encountered in servo drives, supporting rapid charge–discharge cycles.
• General inverters and motor drives: Used as DC link or smoothing capacitors in inverter topologies where stable performance at 400 V and elevated temperatures is required.
• Rectifier/voltage‑doubler circuits: Suitable for rectifier stages including voltage doubler configurations that require reliable high‑voltage capacitance.
• Equipment operating in fluctuating voltage environments: Designed to tolerate voltage variation and maintain electrical characteristics under frequent charge–discharge stress.

Unique Advantages

• Engineered for high‑speed cycling: Series endurance testing (50 million charge–discharge cycles) demonstrates retention of capacitance and electrical parameters under repeated cycling.
• High thermal endurance: Rated for continuous operation up to 105 °C with 3000‑hour endurance performance, supporting elevated ambient applications.
• High‑frequency ripple capability: Specified ripple current at 50 kHz supports modern inverter switching frequencies and regenerative streams.
• Secure snap‑in mounting: Snap‑in terminals simplify assembly and provide stable mechanical connection for high‑vibration power electronics.
• Clear electrical limits: Leakage current formula and tan δ limits are published for design verification and margin calculations.
• RoHS compliance: Meets RoHS (2011/65/EU, (EU)2015/863) requirements for environmentally constrained designs.

Why Choose LQS2G561MELB50?

The LQS2G561MELB50 is positioned for engineers designing power conversion and motor control systems who need a robust, high‑voltage aluminum electrolytic capacitor with proven charge–discharge endurance. With a 400 V rating, 560 µF capacitance, high ripple current capability, and elevated temperature endurance, it fits designs where regenerative events and voltage fluctuation are routine.

Backed by Nichicon’s LQS series specifications, this capacitor delivers verifiable electrical limits and lifecycle behavior that simplify specification and reliability planning for inverter, servo, and rectifier applications.

If you need pricing, availability, or a formal quote for LQS2G561MELB50, please request a quote or contact our sales team to discuss your project requirements and lead times.