ULD1H4R7MDD

The ULD1H4R7MDD is a miniature, radial-lead aluminum electrolytic capacitor from the ULD series designed for long-life general-purpose power applications. It provides 4.7 µF capacitance at a 50 V rating with polarized construction and is intended for compact through-hole assemblies.

Key value comes from a combination of small size (φ5×11L, seated height 1.1 cm), extended endurance (rated 10,000 hours at 105°C), controlled leakage and measurable ripple handling, making it suitable for compact power-supply filtering and LED lighting power modules.

Key Features

• Capacitance & Voltage — 4.7 µF nominal capacitance with a 50 V rated voltage and a tolerance of -20% to +20%.
• Long-Life Endurance — Rated life of 10,000 hours at +105°C under rated voltage and ripple conditions, supporting sustained operation in elevated-temperature environments.
• Leakage & Loss — Low leakage current specified at 3 µA and tangent of loss angle (tanδ) of 0.19 measured at 20°C, 120 Hz, enabling predictable performance in DC filtering roles.
• Ripple Handling — Low-frequency ripple current of 33.6 mA (120 Hz) and high-frequency ripple current of 80 mA (100 kHz) for smoothing and decoupling in power circuits.
• Temperature Range — Operating across -40°C to +105°C for compatibility with a range of commercial and industrial ambient conditions.
• Package & Mounting — Radial lead, polarized aluminum can, physical size φ5×11L with 2 mm lead spacing (±0.5 mm) for compact through-hole PCB layouts.
• Regulatory — RoHS compliant.

Typical Applications

• LED lighting power supplies — Provides compact, long-life smoothing and decoupling for LED driver circuits where sustained operation at elevated temperature is required.
• Compact power supplies — Suited to through-hole power-filtering stages in small form-factor supplies thanks to its small footprint and 50 V rating.
• General-purpose decoupling — Useful for DC bus smoothing and local decoupling in consumer and industrial electronics with polarized capacitor requirements.

Unique Advantages

• Miniature form factor with long life — φ5×11L size combined with 10,000-hour endurance at 105°C enables compact designs without sacrificing usable lifetime.
• Predictable electrical performance — Specified tanδ and leakage current values support reliable filter and decoupling behavior in design calculations.
• Ripple capability across frequencies — Specified low- and high-frequency ripple currents allow designers to evaluate performance for both mains-frequency and switching-frequency environments.
• Through-hole, easy integration — Radial-lead mounting and 2 mm lead spacing simplify placement and soldering in traditional PCB assemblies.
• RoHS compliance — Meets RoHS directive requirements for regulated material content in assemblies.

Why Choose ULD1H4R7MDD?

ULD1H4R7MDD positions itself as a compact, reliable aluminum electrolytic solution for designers needing a small, polarized capacitor with defined long-life performance at elevated temperature. Its combination of 4.7 µF capacitance, 50 V rating, controlled leakage and measurable ripple handling makes it appropriate for compact power supply filtering and LED driver applications where space and lifetime matter.

Manufactured as part of the ULD series, the part is suited to engineers and procurement teams building through-hole assemblies who require documented endurance, temperature range, and RoHS compliance. Its predictable electrical characteristics and compact package help streamline BOM decisions and system-level reliability planning.

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