UCS2G390MND9

The UCS2G390MND9 is a miniature radial-lead aluminum electrolytic capacitor designed for high ripple current and long-term reliability. Built for power applications, it is suited to power supplies and ballast circuits that require high-voltage smoothing and robust ripple-handling at elevated temperatures.

Key value propositions include a 39 µF capacitance at 400 V rating, high ripple capability across low and high frequencies, long life under load at +105°C, and RoHS compliance for environmental consistency.

Key Features

• Electrical Performance — 39 µF capacitance with a 400 V rated voltage and ±20% tolerance, providing stable bulk storage in high-voltage circuits.
• High Ripple-Current Capability — Rated ripple currents of 400 mA at 120 Hz and 800 mA at 100 kHz, enabling effective smoothing in both low- and high-frequency power stages.
• Long Life at Elevated Temperature — Designed for endurance with a rated lifetime of 10000 hours at +105°C under specified DC bias plus ripple conditions.
• Thermal Range and Reliability — Operating temperature range from −40°C to +105°C to support a wide array of industrial environments.
• Radial Can Packaging — Radial lead, can-style package with 5 mm lead spacing and compact footprint (size dimension L: 4 × D: 1 cm) for through-hole PCB designs.
• Leakage Current Specification — Leakage current follows the datasheet formula: not more than 0.04CV+100 µA after 1 minute at 20°C, enabling predictable leakage behavior for design margining.
• RoHS Compliant — Conforms to RoHS directive (2011/65/EU, (EU)2015/863) for environmental compliance.

Typical Applications

• Power Supplies — Bulk smoothing and ripple suppression in high-voltage power supply outputs where high ripple current and long life are required.
• Ballast Circuits — Robust ripple endurance for lamp ballast and lighting driver applications exposed to continuous AC ripple and elevated temperatures.
• General-Purpose Industrial Electronics — Use where a compact, high-voltage electrolytic capacitor is needed for energy storage and filtering in through-hole assemblies.

Unique Advantages

• High ripple tolerance: Supports 400 mA at 120 Hz and 800 mA at 100 kHz, reducing stress on upstream regulation and improving output stability.
• Extended high-temperature life: Rated for 10000 hours at +105°C, enabling longer maintenance intervals and predictable end-of-life planning.
• Compact radial-can form factor: Small footprint (L: 4 × D: 1 cm) and 5 mm lead spacing simplify layout in space-constrained through-hole designs.
• Wide operating temperature range: −40°C to +105°C operation covers environments from cold-start conditions to high ambient industrial settings.
• Predictable leakage behavior: Datasheet-defined leakage current formula aids in system-level current budgeting and reliability analysis.
• Regulatory compliance: RoHS conformity supports environmentally regulated product development and sourcing.

Why Choose UCS2G390MND9?

UCS2G390MND9 positions itself as a reliable, compact solution for designers needing a high-voltage electrolytic capacitor with strong ripple-handling and long-term performance at elevated temperatures. Its combination of 39 µF/400 V rating, high ripple current capability, and 10000-hour endurance at +105°C makes it well suited for power supplies, ballast circuits, and general-purpose industrial electronics.

For engineers and procurement teams, this part offers predictable electrical characteristics, RoHS compliance, and a through-hole radial package that eases integration into established PCB assembly processes.

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