LQS2V681MELC40

The LQS2V681MELC40 is an aluminum electrolytic capacitor in a snap‑in terminal radial can designed for high‑speed charge/discharge applications. It is rated 350 V with 680 µF capacitance and ±20% tolerance, and is specified for operation from –25 °C to +105 °C.

Built for power‑electronics environments, this part is suited to high‑frequency regenerative voltages, inverters and AC servomotor circuits, fluctuating‑voltage equipment, and rectifier/voltage‑doubler circuits. It delivers verified endurance under thermal and charge/discharge stress and is RoHS compliant.

Key Features

• Capacitance & Voltage — 680 µF nominal capacitance at a 350 V rating with ±20% tolerance for bulk energy storage and DC link use.
• High‑Temperature Rating — Rated for operation up to 105 °C with a specified endurance of 3000 hours at 105 °C under DC bias plus rated ripple current.
• High‑Speed Charge/Discharge Endurance — Qualified for charge/discharge endurance testing of 50 million cycles (room temperature, charge/discharge voltage = rated voltage + 0.35 V, 6 Hz), with capacitance, tan δ and leakage current meeting specified limits afterward.
• Ripple Current Capability — Specified ripple current handling of 1.7 A at 120 Hz and 2.431 A at 50 kHz to support high‑frequency power circuits.
• Electrical Losses and Leakage — tan δ (max) 0.15 at 350 V (120 Hz, 20 °C); leakage current specified by I ≤ 3√(C·V) µA after 5 minutes at 20 °C.
• Package & Mounting — Radial, snap‑in can package for secure board mounting in power assemblies; polarized design for DC link and rectifier use.
• Temperature Stability — Category temperature range –25 °C to +105 °C and impedance ratio Z(–25 °C)/Z(+20 °C) ≤ 8 for 350–450 V ratings (120 Hz measurement).
• Compliance — RoHS compliant (2011/65/EU, (EU)2015/863).

Typical Applications

• AC Servo Drives & Motor Control — Bulk energy storage and regenerative voltage buffering in servo and motion control systems.
• General Inverters — DC link and smoothing capacitor for inverter stages where high ripple and frequent charge/discharge cycles occur.
• Regenerative Circuits — High‑frequency regenerative voltage handling in power conversion and energy recovery circuits.
• Rectifier / Voltage Doubler Circuits — Suited for rectifier stages and voltage‑doubler configurations requiring reliable high‑voltage capacitors.
• Industrial Power Equipment — Systems operating in fluctuating‑voltage environments that demand thermal endurance and high cycle life.

Unique Advantages

• Rated for High DC Voltage: 350 V rating enables use in DC link and high‑voltage power sections without speculative derating.
• Designed for High‑Frequency Stress: Explicit charge/discharge endurance testing (50 million cycles) and measured high‑frequency ripple current ratings support demanding switching applications.
• High Temperature Endurance: 3000 hours at 105 °C under rated stress provides predictable lifetime behavior in hot operating environments.
• Measured Loss and Leakage Limits: tan δ and leakage current specifications (including I ≤ 3√(C·V) µA) give clear electrical performance expectations for design verification.
• Practical Snap‑In Form Factor: Radial snap‑in can simplifies secure PCB mounting for power assemblies and cabinetized equipment.
• RoHS Compliance: Meets applicable RoHS directives, supporting regulatory requirements for restricted substances.

Why Choose LQS2V681MELC40?

The LQS2V681MELC40 combines a 350 V rating, substantial 680 µF capacitance, and high‑temperature endurance to meet the needs of industrial power electronics where repeated charge/discharge cycles and ripple current are routine. Its snap‑in radial can design and clear electrical limits (tan δ, leakage, ripple current) make it straightforward to evaluate and integrate into DC link, inverter and regenerative circuits.

This part is suited for engineers and procurement targeting robust, validated capacitors for inverter drives, regenerative systems and industrial power supplies where thermal endurance and cycle life must be quantified and documented.

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