LGUW6391MELB

The LGUW6391MELB is a snap‑in terminal aluminum electrolytic capacitor from Nichicon's LGU series. It delivers 390 µF of capacitance at a 420 V rating in a φ30 × 50 mm radial can optimized for snap‑in mounting and tray packing for volume production.

Designed for general‑purpose applications that require high voltage bulk capacitance and reliable ripple handling, this capacitor combines a 105°C endurance rating with specified low‑frequency and high‑frequency ripple current capability to support sustained operation under load.

Key Features

• Rated Voltage & Capacitance — 420 V rated voltage with 390 µF capacitance and ±20% tolerance, offering high‑voltage bulk energy storage in a single radial can.
• High Temperature Endurance — Rated for 3,000 hours at 105°C under specified ripple and DC bias, supporting long service life in elevated ambient conditions.
• Ripple Current Performance — 1.55 A at 120 Hz (low frequency) and 2.2165 A at 50 kHz (high frequency), enabling effective AC ripple handling across typical power‑electronics frequencies.
• Low Loss (tan δ) — tan δ ≤ 0.15 (measurement condition: 120 Hz, 20°C for the 160–420 V range), indicating controlled ESR‑related losses for improved efficiency.
• Leakage Current — Specified leakage current of 1,210 µA, suitable for applications where defined leakage limits are required.
• Operating Temperature Range — −25°C to +105°C, matching the LGU series category temperature limits for 315–450 V parts.
• Package & Mounting — Snap‑in radial can (φ30 × 50 mm) with tray packing for straightforward assembly and high‑volume handling; maximum seated height: 1.969 inches.
• RoHS Compliance — Compliant with RoHS directive as specified in series documentation.

Typical Applications

• General‑purpose power systems — Bulk energy storage and smoothing where a 420 V rated snap‑in capacitor is required.
• AC/DC and DC/DC converters — Intake and intermediate bulk capacitance to support ripple attenuation at both low and high frequencies.
• Industrial electronics — Circuits operating up to 105°C that demand long endurance and stable capacitance under rated ripple current.

Unique Advantages

• 420 V / 390 µF combination: Provides high voltage bulk capacitance in a single component, reducing part count in high‑voltage designs.
• 3000‑hour endurance at 105°C: Validated long life under rated ripple and bias, helping to ensure predictable field performance in elevated temperatures.
• Measured ripple capability at low and high frequencies: Specified ripple currents at 120 Hz and 50 kHz support versatile use across power‑conversion stages.
• Controlled dielectric loss: tan δ ≤ 0.15 at 120 Hz (160–420 V range) limits power dissipation and thermal build‑up in demanding applications.
• Snap‑in radial package: Secure mechanical mounting and tray packing streamline assembly for mass production.
• RoHS compliant: Conforms to RoHS requirements referenced in the LGU series documentation.

Why Choose LGUW6391MELB?

The LGUW6391MELB positions itself as a reliable high‑voltage aluminum electrolytic solution for designers needing 420 V bulk capacitance with specified ripple handling and extended high‑temperature endurance. Its combination of 390 µF capacitance, controlled loss characteristics, and snap‑in packaging make it suitable for general‑purpose power electronics where long life at elevated temperature is required.

Choose this part for designs that prioritize stable capacitance under load, predictable leakage and loss parameters, and compatibility with volume assembly processes thanks to its snap‑in radial can and tray packing.

To request a quote or submit an RFQ for the LGUW6391MELB, please reach out to our sales team with your quantity and delivery requirements to discuss pricing, lead times, and technical details.