UPJ1J391MHD

The UPJ1J391MHD from Nichicon is a high-reliability, miniature radial-lead aluminum electrolytic capacitor in the UPJ series. Designed as a low-impedance, polarized can-type capacitor, it delivers 390 µF at 63 V with a compact φ12.5 × 30.5 mm package and 5 mm lead spacing.

It is intended for general-purpose power filtering and energy storage in applications such as switching power supplies, offering extended endurance and robust ripple handling for demanding electronic power circuits.

Key Features

• Capacitance & Rated Voltage — 390 µF nominal capacitance with a rated voltage of 63 V and tolerance of ±20% at 120 Hz, 20°C.
• Low Impedance Performance — Specified low-loss characteristic with tanδ (DF) of 0.08 (measured at 20°C, 120 Hz for 63 V), supporting lower ESR in power applications.
• High Ripple Current Capability — Handles 756 mA at 120 Hz (low frequency) and 1.26 A at 200 kHz (high frequency), enabling effective smoothing under real-world switching conditions.
• Long Endurance at Elevated Temperature — Rated for 5000 hours at +105°C under load, providing extended operational life for thermal-stressed power designs.
• Wide Operating Temperature Range — Operates from −55°C to +105°C, accommodating a broad variety of ambient conditions.
• Compact Radial Package — Metal can with radial leads, physical size φ12.5 × 30.5 mm and 5 mm lead spacing (±0.5 mm), available in bulk/no terminal forming or bag packing.
• Leakage Current — Product-level leakage current specified at 737.1 µA, measurable after rated voltage application per datasheet conditions.
• RoHS Compliant & Production Ready — RoHS status compliant and listed as mass production status.

Typical Applications

• Switching Power Supplies — Provides low-impedance filtering and energy buffering to stabilize output rails in switch-mode power supply designs.
• Power Supply Filtering for General-Purpose Electronics — Serves as a bulk storage and decoupling capacitor on DC power rails in industrial and consumer equipment.
• DC‑DC Converter Output Stages — Used for smoothing and ripple reduction on converters where high ripple current capability and elevated temperature endurance are required.

Unique Advantages

• Designed for Switching Environments — Low-impedance construction and measured tanδ support reduced loss and improved performance in switching applications.
• High Thermal Endurance — 5000-hour rated life at +105°C provides predictable ageing characteristics for thermally demanding designs.
• High Ripple Handling — Distinct low- and high-frequency ripple current ratings (756 mA at 120 Hz; 1.26 A at 200 kHz) match the needs of real-world power circuitry.
• Compact Radial Form Factor — φ12.5 × 30.5 mm can with 5 mm lead spacing balances PCB space efficiency and ease of through-hole assembly.
• Production Availability — Mass production status and standard packaging options (bulk or bag) simplify procurement and assembly planning.
• Regulatory Compliance — RoHS-compliant construction supports environmental compliance requirements.

Why Choose UPJ1J391MHD?

The UPJ1J391MHD is positioned for engineers who need a reliable, low-impedance aluminum electrolytic capacitor for power filtering and energy storage at up to 63 V. With quantified ripple current ratings, a low tanδ, and a long 5000-hour life at +105°C, it is suitable for designs that require durable performance under thermal and electrical stress.

This Nichicon UPJ-series part is appropriate for equipment designers in industrial, consumer, and power electronics markets seeking a compact radial-lead solution that combines specified electrical performance with RoHS compliance and production availability.

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