LQS2V681MELB50

The LQS2V681MELB50 from Nichicon is a snap‑in terminal aluminum electrolytic capacitor in the LQS series designed for high‑speed charge–discharge applications. With a 350 V rating and 680 µF capacitance, it targets power electronics where regenerative energy handling and voltage fluctuation tolerance are required.

Engineered for demanding thermal and cycling conditions, this capacitor supports operation from −25°C to 105°C, offers a 3000‑hour endurance at 105°C, and is RoHS compliant.

Key Features

• Capacitance & Voltage — 680 µF nominal capacitance at a rated voltage of 350 V with ±20% tolerance, suitable for bulk energy storage in power stages.
• High‑temperature endurance — Rated for operation from −25°C to 105°C with an endurance specification of 3000 hours at 105°C under DC bias plus rated ripple current.
• High‑speed charge–discharge capability — Designed for high speed charge–discharge behavior; endurance testing includes 50 million charge/discharge cycles (6 Hz) with capacitance change within ±20%.
• Ripple current performance — Rated ripple current of 1.7 A at 120 Hz and 2.431 A at 50 kHz, supporting both low‑ and high‑frequency ripple environments.
• Electrical characteristics and reliability — Leakage current follows I ≤ 3√(C·V) μA after 5 minutes at 20°C; tangent of loss angle (tan δ) maximum 0.15 at 350 V (measured at 120 Hz, 20°C).
• Mounting & package — Snap‑in terminal, radial can package with a 5 × 3 cm (L × D) dimension for secure PCB mounting in power assemblies.
• Regulatory — Compliant with the RoHS directive (2011/65/EU, (EU)2015/863).

Typical Applications

• AC servo and motor drives — Handles high‑frequency regenerative voltages and rapid charge/discharge events in servo and motor control inverters.
• General inverters — Bulk energy storage and ripple smoothing for inverter DC link circuits exposed to voltage fluctuation.
• Rectifier and voltage doubler circuits — Suitable for rectifier stages and voltage doubler configurations requiring robust high‑voltage capacitance.
• Equipment operating in fluctuating voltage environments — Provides stability and endurance where supply voltage varies and repeated energy recovery occurs.

Unique Advantages

• Robust high‑temperature performance — 3000‑hour rated lifetime at 105°C delivers predictable behavior in thermally stressed power systems.
• Designed for frequent cycling — Specified charge/discharge endurance (50 million cycles at room temperature conditions) helps ensure long service life in regenerative applications.
• High voltage capability — 350 V rating allows use in DC link and high‑voltage power stages without additional series components.
• Measurable ripple handling — Specified ripple currents at both 120 Hz and 50 kHz enable selection based on application frequency content.
• Verified electrical limits — Leakage and tan δ limits (I ≤ 3√CV and tan δ ≤ 0.15 at 350 V) provide concrete criteria for design margining and screening.
• RoHS compliance — Meets current RoHS requirements for use in regulated markets.

Why Choose LQS2V681MELB50?

The LQS2V681MELB50 combines high voltage (350 V), substantial capacitance (680 µF), and snap‑in packaging to address bulk energy storage and regenerative load demands in power electronics. Its high‑temperature rating and endurance testing under charge/discharge cycling make it a practical choice for inverter, servo, and rectifier circuits exposed to frequent energy recovery and voltage fluctuation.

This part is suited to engineers and procurement teams building robust power stages who need verifiable electrical limits (leakage, tan δ, ripple current) and documented endurance at elevated temperature. Sourced from Nichicon’s LQS series, it provides a specification‑driven option for designs that require predictable long‑term performance.

If you would like pricing or availability information, request a quote or submit an inquiry to receive a formal proposal and lead‑time details for the LQS2V681MELB50.