LQSW6271MELB30

The LQSW6271MELB30 from Nichicon is a snap‑in terminal aluminum electrolytic capacitor in the LQS series, designed for high‑speed charge–discharge and high‑voltage DC applications. With a 270 µF capacitance at 420 V and a rated operating temperature up to 105°C, it is engineered for power electronics where reliable energy buffering and regenerative handling are required.

Typical use cases include high‑frequency regenerative circuits for AC servomotors and general inverters, rectifier circuits such as voltage doublers, and industrial equipment subject to voltage fluctuations. The part is RoHS compliant and supplied in a radial, snap‑in can package for board‑level mounting.

Key Features

• Capacitance & Voltage: 270 µF rated capacitance at 420 V for high‑voltage DC energy storage and smoothing.
• High‑temperature operation: Rated for –25°C to +105°C to support demanding thermal environments.
• High‑speed charge–discharge: Designed for rapid charge–discharge cycles and endurance under repetitive switching; series-level endurance characterized for charge–discharge behavior up to 50 million cycles at room temperature (see datasheet).
• Snap‑in radial can package: Snap‑in terminal mounting provides secure board retention and straightforward installation in power assemblies.
• Ripple current capability: Rated ripple current of 1.25 A at 120 Hz and 1.788 A at 50 kHz to support both low‑ and high‑frequency power ripple conditions.
• Reliability & lifetime: Endurance specified as 3000 hours at 105°C under DC bias plus rated ripple current, with defined limits for capacitance change, tan δ, and leakage current.
• Leakage current specification: Initial leakage current defined by I ≤ 3√(C·V) µA (measured after 5 minutes at 20°C), enabling predictable design margins.
• Polarized device: Polarized electrolytic construction—observe polarity in circuit installation.
• Regulatory compliance: RoHS compliant (2011/65/EU, (EU)2015/863).

Typical Applications

• Inverters & Motor Drives: Energy buffering and regenerative voltage handling for AC servomotor drives and general inverter systems.
• Regenerative Power Circuits: High‑speed charge–discharge capability makes it suitable for regenerative circuits that see frequent switching and polarity changes.
• Rectifier & Doubling Circuits: Well suited for rectifier circuits and voltage doubler topologies where stable high‑voltage capacitance is required.
• Industrial Equipment in Fluctuating Voltage Areas: Robust operation under fluctuating supply conditions where thermal and voltage stress are present.

Unique Advantages

• High‑voltage rating (420 V): Enables use in mid‑ to high‑voltage DC sections of power systems without series stacking.
• Temperature resilience to 105°C: Supports continuous operation in hot environments and helps maintain capacitance over extended use.
• Measured ripple performance: Specified ripple current values at both 120 Hz and 50 kHz give designers concrete data for thermal and ripple budgeting.
• Durability under repetitive cycling: Characterized endurance for millions of charge–discharge cycles provides predictable lifetime behavior in demanding switching applications.
• Predictable leakage behavior: Leakage current defined by a standard formula (I ≤ 3√CV) simplifies margin calculations during design validation.
• RoHS compliance: Conforms to applicable RoHS directives for use in regulated markets and projects.

Why Choose LQSW6271MELB30?

The LQSW6271MELB30 combines a high 420 V rating with 270 µF capacitance in a snap‑in aluminum electrolytic format optimized for high‑speed charge–discharge and ripple‑heavy environments. Its 105°C rating, defined endurance (3000 hours at 105°C under rated conditions), and measurable ripple current performance make it appropriate for power conversion, regenerative drive, and rectifier applications where thermal and electrical stress are concerns.

Designed and manufactured by Nichicon as part of the LQS series, this capacitor offers engineering teams clear, datasheet‑driven parameters for reliability forecasting and BOM selection in industrial and power electronics designs.

Request a quote or contact sales to discuss availability, lead times, and to submit a formal quote request for the LQSW6271MELB30.