UPT2D391MHD

The UPT2D391MHD is a miniature, high-reliability aluminum electrolytic capacitor from Nichicon’s UPT series. It is a radial-lead, polarized capacitor specified at 390 µF and 200 V, engineered for applications that require compact high-capacitance components with strong ripple-handling and long endurance.

Typical use cases include ballast and other general-purpose high-voltage circuits where sustained ripple current, long life at elevated temperature, and robust operating temperature range are required. The part delivers measurable performance attributes—ripple current capability, defined loss angle, and specified leakage—that support reliable power-filtering duty.

Key Features

• Capacitance & Tolerance — 390 µF with a capacitance tolerance of −20% to +20% (measured at 120 Hz, 20°C).
• Rated Voltage — 200 V DC rating suitable for high-voltage DC applications requiring a compact electrolytic solution.
• High Ripple Current Capability — Rated ripple currents of 1.13 A at 120 Hz and 1.808 A at 10 kHz allow operation in circuits with significant AC ripple components.
• Long Endurance — Specified life of 5000 hours at 105°C under rated DC bias plus rated ripple current, meeting endurance criteria for extended service in demanding environments.
• Temperature Range — Operational from −40°C to +105°C for broad environmental compatibility.
• Loss Angle (tan δ) — tan δ of 0.12 (measured at 20°C, 120 Hz), providing a defined dissipation factor for thermal and AC loss assessments.
• Leakage Current — Specified leakage current of 4690 µA (measured after 2 minutes at 20°C under rated voltage), useful for system-level leakage and standby calculations.
• Compact Radial Package — φ18 × 40 mm can with 7.5 mm lead spacing and radial lead mounting simplifies through-hole assembly and replacement in existing footprints.
• RoHS Compliant — Meets RoHS directive requirements as indicated in product data.

Typical Applications

• Ballast and Lighting Systems — Provides high ripple-current handling and long life for ballast circuits where sustained AC ripple is present.
• Power Supply Filtering — Serves as a DC smoothing or filtering capacitor in high-voltage power supplies and rectifier outputs.
• General-Purpose High-Voltage Circuits — Used in industrial and electronics equipment requiring compact, high-capacitance, radial-lead electrolytic capacitors.

Unique Advantages

• Designed for High-Ripple Environments: Rated ripple currents at both low and high frequencies reduce overheating risk and improve stability under AC stress.
• Verified Endurance at Elevated Temperature: 5000 hours at 105°C under rated conditions supports predictable service life planning in high-temperature installations.
• Compact Footprint: φ18 × 40 mm can size with 7.5 mm lead spacing provides a high-capacitance option for space-constrained through-hole designs.
• Clear Electrical Characteristics: Defined tan δ and measured leakage current enable precise thermal and leakage budgeting in system design.
• Regulatory Compliance: RoHS compliance aligns with modern regulatory requirements for lead-free assemblies.
• Through-Hole Convenience: Radial-lead mounting simplifies prototyping, repair, and retrofit workflows.

Why Choose UPT2D391MHD?

UPT2D391MHD combines a high-capacitance, 200 V rating with elevated ripple-current capability and a long 5000-hour endurance at 105°C, making it well suited for designers needing a compact, reliable electrolytic for high-voltage, high-ripple environments. Its defined electrical parameters—tan δ, leakage current, and tolerance—provide the predictability required for engineering calculations and thermal management.

As part of Nichicon’s UPT series, this radial-lead capacitor is appropriate for engineers and procurement teams specifying components for ballast systems, power supply filtering, and other general-purpose high-voltage circuits that demand long-term stability and clear performance specifications.

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