ULD1H3R3MDD

The ULD1H3R3MDD is a miniature, radial-lead aluminum electrolytic capacitor from Nichicon's ULD series. It provides a polarized 3.3 µF capacitance at a 50 V rating in a compact φ5 × 11 mm can, engineered for general-purpose power applications and suited for power supplies for LED lighting.

Designed for extended operation in elevated temperatures, this part offers long-life endurance and controlled electrical characteristics for space-constrained designs that require reliable smoothing and energy storage.

Key Features

• Capacitance and Voltage — 3.3 µF nominal capacitance with tolerance ±20% and a rated voltage of 50 V (polarized).
• Miniature Radial-Lead Package — Compact φ5 × 11 mm (D: 0.5 cm × L: 1.1 cm) aluminum can with radial leads and 2.0 mm lead spacing (±0.5 mm tolerance) for tight PCB layouts.
• Long Life Endurance — Rated for 10,000 hours at +105°C under DC bias plus rated ripple current.
• Temperature Range — Operates over −40°C to +105°C.
• Low Leakage and Loss — Specified leakage current of 3 µA and tangent of loss angle (tan δ) of 0.19 measured at 20°C, 120 Hz.
• Ripple Current Capability — Low-frequency ripple current 29.4 mA at 120 Hz and high-frequency ripple current 70 mA at 100 kHz.
• Packaging and Compliance — Available in bulk (no terminal forming) or bag packing; RoHS compliant.
• Product Status — End Of Life.

Typical Applications

• LED Lighting Power Supplies — Suited for power-supply smoothing and energy storage in LED driver circuits.
• General-Purpose Power Circuits — Useful in compact power modules and small DC supplies that require a polarized electrolytic capacitor.
• Space-Constrained Electronics — Miniature can size and tight lead spacing make it suitable for designs with limited board area.

Unique Advantages

• Compact form factor: The φ5 × 11 mm can and 2 mm lead spacing enable placement in tight PCB real estate without sacrificing voltage rating.
• Designed for elevated-temperature operation: 10,000-hour endurance at 105°C supports continuous use in warm operating environments.
• Low leakage and controlled dissipation: 3 µA leakage and tan δ of 0.19 at 120 Hz help maintain stable performance in bias-sensitive circuits.
• Dual-frequency ripple handling: Specified ripple currents at 120 Hz and 100 kHz provide predictable behavior across typical power-supply frequencies.
• RoHS-compliant packaging options: Available in bulk or bag packing to suit assembly preferences while meeting regulatory requirements.

Why Choose ULD1H3R3MDD?

ULD1H3R3MDD delivers a compact, polarized electrolytic solution for designers who need a 3.3 µF, 50 V capacitor with defined long-life performance and controlled electrical characteristics. Its miniature radial-lead package, low leakage and specified ripple current ratings make it well suited to general-purpose power circuits and LED power supplies where space and thermal reliability matter.

As a member of Nichicon's ULD series, this part benefits from a design focus on miniature sizing and endurance at elevated temperatures, offering predictable long-term behavior for production designs and engineering evaluations.

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