LLS2C391MELY

The LLS2C391MELY from Nichicon is a snap-in terminal aluminum electrolytic capacitor in the LLS series designed for general-purpose power applications. It delivers 390 µF capacitance at a 160 V rating with a polarized snap-in can package suitable for board-mounted power filtering and energy buffering.

Key value propositions include high ripple-current handling, long endurance at elevated temperature, and a compact φ20×30 mm can size for space-conscious power designs.

Key Features

• Capacitance & Voltage — 390 µF nominal capacitance with a 160 V rated voltage and ±20% tolerance at 120 Hz, 20°C.
• Snap-in Can Package — Radial, can-style snap-in termination for secure mechanical retention in high-vibration or vertically mounted boards; tray packing for production handling.
• Ripple Current Capability — Rated ripple currents of 1.63 A at 120 Hz (low frequency) and 2.445 A at 50 kHz (high frequency) to support power conversion and filtering duties.
• Low Dissipation Factor — tanδ (DF) of 0.15 maximum at 20°C and 120 Hz, supporting efficient energy transfer with controlled losses.
• Leakage Current — Specified leakage current of 740 µA, enabling predictable bias behavior in power circuits.
• Endurance — Designed to withstand 3000 hours of rated ripple current at 85°C, demonstrating long-term reliability under elevated-temperature ripple conditions.
• Operating Temperature — Rated for −40°C to +85°C operation to cover a wide range of industrial and commercial environments.
• Physical Size — Compact dimensions: φ20 × 30 mm (L: 3 cm × D: 2 cm), height seated max 1.181 inch, enabling dense board layouts.
• Compliance — RoHS compliant to support regulatory requirements for lead-free assemblies.

Typical Applications

• Power Supplies: Bulk smoothing and output filtering in medium-voltage power supplies where 160 V rating and high ripple capability improve voltage stability.
• Industrial Drives & Motor Control: DC-link and smoothing applications in motor controllers that require robust ripple handling and extended endurance at elevated temperature.
• UPS and Energy Buffering: Energy storage and discharge buffering in uninterruptible power systems and backup circuits, leveraging the capacitor’s capacitance and ripple ratings.
• Instrumentation & Control Systems: Decoupling and transient suppression in industrial instrumentation where reliable polarized capacitors with predictable leakage are needed.

Unique Advantages

• High-voltage, high-capacitance combination: 390 µF at 160 V supports compact designs that need substantial energy storage without oversized components.
• Designed for sustained ripple stress: 3000-hour endurance at 85°C with rated ripple current preserves performance in continuous-duty power applications.
• Dual-frequency ripple performance: Specified ripple currents at both 120 Hz and 50 kHz provide clear guidance for low- and high-frequency filtering requirements.
• Controlled dissipation: Low tanδ (0.15 at 120 Hz, 20°C) reduces internal heating and improves thermal stability under load.
• Robust package and handling: Snap-in radial can with tray packing simplifies assembly and provides secure PCB retention for production volumes.
• Regulatory readiness: RoHS compliance supports lead-free manufacturing flows.

Why Choose LLS2C391MELY?

LLS2C391MELY combines a high working voltage (160 V) with substantial capacitance (390 µF) in a compact snap-in aluminum can from Nichicon’s LLS series. Its specified low-frequency and high-frequency ripple current ratings, low dissipation factor, and 3000-hour endurance at 85°C make it well suited to continuous-duty power systems and industrial power designs that demand predictable lifetime performance.

This part is appropriate for engineers and buyers designing medium-voltage power supplies, motor drives, UPS systems, and industrial control equipment who need a reliable, production-ready polarized capacitor with clear thermal and ripple specifications.

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