ULD2W270MHD

The ULD2W270MHD is a radial-lead aluminum electrolytic capacitor in the Nichicon ULD series, offering 27 µF capacitance at a 450 V rated voltage. Designed as a miniature, long-life solution, it targets general-purpose and power-supply applications where high-voltage filtering and long endurance are required.

Key value propositions include a long rated lifetime of 20000 hours at 105°C, compact φ16 × 20 mm packaging, and measurable ripple and leakage characteristics suitable for high-voltage power electronics and LED lighting power supplies.

Key Features

• Capacitance & Voltage: 27 µF capacitance with a 450 V rated voltage, suitable for high-voltage filtering and smoothing tasks.
• Long Life Endurance: Rated for 20000 hours at +105°C, providing extended operational life under elevated temperature and bias conditions.
• Ripple Current Handling: Specified ripple capability of 305 mA at 120 Hz (low frequency) and 549 mA at 100 kHz (high frequency), enabling reliable operation under AC ripple stress.
• Leakage & Dissipation: Leakage current specified at 586 µA and a dissipation factor (tan δ) of 0.24 measured at 20°C, 120 Hz, for predictable loss and standby behavior.
• Compact Radial Can Package: φ16 × 20 mm aluminum can, radial lead mounting with 7.5 mm lead spacing (±0.5 mm), suited to thru-hole PCB layouts.
• Polarized, RoHS-compliant: Polarized electrolytic construction and RoHS compliance for regulatory alignment.
• Packaging Options: Available in bulk (no terminal forming) or bag packing for flexible procurement and assembly workflows.

Typical Applications

• LED Lighting Power Supplies — Suited for filtering and smoothing in LED driver circuits where long-term stability at elevated temperature is required.
• High-Voltage Power Supply Filtering — 450 V rating supports filtering and energy storage in high-voltage DC circuits and power electronics.
• General-Purpose Electronics — General-purpose radial electrolytic for designers needing compact, long-life capacitors in through-hole designs.

Unique Advantages

• Extended operating life: 20000 hours at 105°C reduces replacement frequency and supports designs with long uptime requirements.
• High-voltage capability: 450 V rating enables use in higher-voltage supplies without the need for series stacking or larger form factors.
• Measured ripple performance: Explicit low- and high-frequency ripple current specifications (305 mA @120 Hz, 549 mA @100 kHz) help match the capacitor to expected ripple loads.
• Predictable leakage and loss: Specified leakage current (586 µA) and tan δ (0.24 @120 Hz, 20°C) allow accurate power-loss and standby calculations.
• Space-efficient radial can: φ16 × 20 mm footprint with 7.5 mm lead spacing balances compactness and ease of through-hole assembly.
• Regulatory readiness: RoHS compliance supports environmental requirements for commercial and industrial applications.

Why Choose ULD2W270MHD?

The ULD2W270MHD combines a high 450 V rating with a compact φ16 × 20 mm radial package and a long 20000-hour endurance at 105°C, delivering a reliable capacitor option for high-voltage power supplies and LED driver applications. Its specified ripple current, leakage, and dissipation factor enable engineers to design with measurable electrical behavior and predictable lifetime.

This part is well suited to designers and procurement teams seeking a durable, high-voltage electrolytic capacitor for general-purpose and power-electronics designs that require verified performance data and RoHS compliance.

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