UPJ1J391MHD6

The UPJ1J391MHD6 is a miniature, high-reliability aluminum electrolytic capacitor from Nichicon’s UPJ series. It is a radial-lead, low-impedance power capacitor designed for demanding power applications that require high ripple handling and long operational life.

Engineered for switching power supplies and general-purpose power filtering, this 390 µF, 63 V unit delivers measurable benefits in compact power designs through its combination of low loss, strong ripple-current capability, and extended endurance at elevated temperature.

Key Features

• Electrical Capacity — 390 µF nominal capacitance with tolerance of -20% to +20% at 120 Hz, 20°C.
• Rated Voltage — 63 V DC rated voltage for mid-voltage power rails.
• Low Loss — Tangent of loss angle (tan δ) specified at 0.08 (63 V rating) measured at 20°C, 120 Hz for reduced dissipation.
• Ripple Current Capability — Low-frequency ripple current 702 mA (120 Hz) and high-frequency ripple current 1.17 A (200 kHz), supporting switching and high-frequency converter outputs.
• Leakage Current — Specified leakage current 737.1 µA after rated voltage application at 20°C.
• High Endurance — Load life rated 5000 hours at +105°C (endurance conditions per UPJ series specification).
• Wide Temperature Range — Operating range from -55°C to +105°C for robust performance across industrial temperature extremes.
• Compact Radial Package — Mechanical size φ16 × 20 mm (φ16 × 20L) with 7.5 mm lead spacing (±0.5 mm) and radial-lead mounting for through-hole assemblies.
• Packaging Options — Available in Bulk (no terminal forming) and Bag packing to suit production handling.
• Environment — RoHS compliant as specified in the product data.

Typical Applications

• Switching Power Supplies — Low impedance and high ripple capability make this part well suited for output filtering and energy storage in switch-mode power supplies.
• DC-DC Converters — Supports high-frequency ripple currents typical of converter outputs, helping stabilize voltage rails.
• Industrial Power Electronics — Useful in general-purpose power-filtering roles where extended high-temperature endurance and wide operating range are required.
• Consumer and Commercial Equipment — Applicable for bulk smoothing and decoupling on mid-voltage rails in compact, through-hole designs.

Unique Advantages

• Measured High Ripple Tolerance: Rated ripple currents of 702 mA (120 Hz) and 1.17 A (200 kHz) support both low- and high-frequency applications without overstressing the capacitor.
• Long Life at Elevated Temperature: 5000 hours endurance at +105°C provides predictable long-term behavior in thermally demanding environments.
• Low Dissipation: tan δ of 0.08 at the 63 V rating reduces internal heating and improves efficiency in continuous-operation designs.
• Compact Through-Hole Footprint: φ16 × 20 mm body with 7.5 mm lead spacing offers a small, serviceable package for through-hole layouts and repairable assemblies.
• RoHS Compliant: Meets RoHS requirements, simplifying use in designs that require restricted-substance compliance.
• Manufacturer Support: Part of Nichicon’s UPJ series, which is specified for low impedance and suitability in switching power supply applications.

Why Choose UPJ1J391MHD6?

UPJ1J391MHD6 combines a compact radial package with high ripple-current capability and a long 5000-hour life at +105°C, making it an effective choice for engineers designing switching power supplies, DC-DC converters, and general-purpose power rails. Its low dielectric loss and controlled leakage current deliver stable performance under continuous load.

This capacitor is suited to customers seeking a reliable, compact aluminum electrolytic solution from a recognized manufacturer, where long-term thermal endurance, measurable ripple handling, and RoHS compliance are important selection criteria.

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