LQS2V121MELZ25

The LQS2V121MELZ25 is an aluminum electrolytic, snap‑in terminal capacitor from Nichicon's LQS series. It delivers 120 µF nominal capacitance at a 350 V rated voltage in a compact 22 × 25 mm radial can designed for high‑speed charge/discharge and board-level snap‑in mounting. Typical use cases include high‑frequency regenerative circuits and inverters where voltage fluctuation tolerance and high ripple handling are required.

Key Features

• High Voltage Rating: 350 V rated voltage for DC bus and high‑voltage power supply applications.
• Capacitance and Tolerance: 120 µF nominal with ±20% tolerance (measured at 120 Hz, 20°C), suitable for energy storage and smoothing duties.
• Compact Snap‑In Package: Radial, can‑type snap‑in mounting with dimensions φ22 × 25 mm for secure PCB installation and compact power assemblies.
• Wide Operating Temperature: Rated for –25°C to +105°C operation, supporting demanding thermal environments.
• Endurance and Lifetime: Designed for 3,000 hours at 105°C under rated conditions; endurance specifications include charge/discharge behavior verified for 50 million cycles at 6 Hz with controlled performance changes.
• Ripple Current Capability: 750 mA at 120 Hz (rated ripple) and 1.073 A at 50 kHz for handling both low‑ and high‑frequency ripple loads.
• Leakage Current Specified: Leakage current meets I ≤ 3√(C·V) µA after 5 minutes at 20°C, enabling predictable bias characteristics.
• Loss Angle (tan δ): tan δ max. 0.15 at 350 V (measured at 120 Hz, 20°C), supporting stable AC performance.
• RoHS Compliant: Compliant with RoHS directives (2011/65/EU, (EU)2015/863).

Typical Applications

• AC Servo Drives and Regenerative Inverters: Suited for high‑frequency regenerative voltage handling in AC servomotor and general inverter circuits.
• Power Supplies with Voltage Fluctuation: Designed for equipment operating in environments with fluctuating voltages where stable DC bus smoothing is needed.
• Rectifier and Voltage Doubler Circuits: Appropriate for rectifier circuits, including voltage doubler configurations requiring high‑voltage capacitors.
• General Purpose Power Electronics: Useful as a general‑purpose high‑voltage electrolytic in industrial power assemblies and DC link applications.

Unique Advantages

• High DC Voltage Capability: 350 V rating enables use in higher‑voltage power rails without series stacking.
• Robust Thermal Performance: –25°C to +105°C range with a 3,000‑hour lifetime at 105°C supports reliable operation in harsh thermal environments.
• Proven Charge/Discharge Endurance: Verified endurance for 50 million charge/discharge cycles at 6 Hz with controlled changes in capacitance, tan δ, and leakage current.
• Effective Ripple Management: Rated ripple current of 750 mA at 120 Hz and 1.073 A at 50 kHz helps reduce heating and extend service life under AC ripple stress.
• Board‑Ready Snap‑In Mounting: Snap‑in radial can simplifies PCB assembly and provides mechanical stability for power module installations.
• Predictable Leakage Behavior: Leakage current specified by I ≤ 3√(C·V) µA after initial application, aiding margining and bias calculations.

Why Choose LQS2V121MELZ25?

The LQS2V121MELZ25 combines a high 350 V rating with compact 120 µF capacitance and snap‑in packaging to deliver a dependable solution for high‑voltage power electronics. Its specification set — including wide operating temperature, defined ripple current at both low and high frequencies, and documented endurance and leakage limits — makes it suitable for engineers designing inverters, servo drives, rectifier stages, and other industrial power systems where voltage swings and frequent charge/discharge events occur.

This part offers long‑term value through predictable electrical behavior, mechanical board‑mount convenience, and RoHS compliance, making it a practical choice for production designs that require reliable high‑voltage capacitors from a recognized series.

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