UPH2W181MHD

The UPH2W181MHD is a high-voltage, miniature-sized aluminum electrolytic capacitor from Nichicon’s UPH series. It is a radial-lead, polarized electrolytic designed for general-purpose and ballast applications where compact high-voltage energy storage and high ripple tolerance are required.

Key value comes from its 450 V rating, 180 µF capacitance, elevated ripple-current capability, and a specified load life of 2000 hours at 105°C, combined with RoHS compliance.

Key Features

• Electrical Performance: 180 µF capacitance at a 450 V rated voltage with ±20% tolerance, providing high-voltage energy storage for filtering and smoothing functions.
• High Ripple Current: Rated ripple current of 1.09 A at 120 Hz and 1.635 A at 10 kHz, enabling reliable operation under significant AC ripple conditions.
• Thermal and Endurance Rating: Operating temperature range of –40°C to +105°C and a load life of 2000 hours at 105°C when subjected to DC bias plus rated ripple current.
• Leakage and Loss Characteristics: Leakage current specified as not more than 0.04CV + 100 µA after 1 minute at 20°C; tangent of loss angle (tan δ) for 450 V is specified at 0.20 (max) per datasheet.
• Compact Radial Can Package: Radial, can-style package with radial lead mounting; physical size approximately L: 4.6 × D: 1.8 cm and lead spacing of 7.5 mm for straightforward PCB integration.
• Environmental Compliance: RoHS compliant (2011/65/EU, (EU)2015/863), supporting regulatory requirements for lead-free assemblies.

Typical Applications

• Lighting Ballasts: Suited for ballast circuits that require compact, high-voltage capacitors capable of handling elevated ripple currents and long operating life at elevated temperature.
• General-Purpose High-Voltage Filtering: Use in high-voltage DC filter and smoothing stages where 450 V rating and 180 µF capacitance are appropriate.
• Power Electronics: Local energy storage and ripple absorption in compact power supplies and converters that operate within the specified temperature and ripple limits.

Unique Advantages

• High-Voltage Capability: 450 V rating enables use in higher-voltage circuits without stepping up component count.
• Compact Footprint: Miniature radial can (≈4.6 × 1.8 cm) with 7.5 mm lead spacing simplifies layout in space-constrained designs.
• Designed for High Ripple: Measured ripple ratings at both 120 Hz and 10 kHz provide predictable performance across common ripple frequencies.
• Long High-Temperature Life: 2000 hours load life at 105°C supports reliability in thermally demanding applications.
• Specification Transparency: Datasheet-defined leakage current and tan δ limits allow precise engineering trade-offs during selection and design.
• Regulatory Compliance: RoHS compliance facilitates integration into lead-free product initiatives.

Why Choose UPH2W181MHD?

UPH2W181MHD combines high-voltage rating, substantial capacitance, and elevated ripple capability in a compact radial can package, making it suitable for ballast and other high-voltage general-purpose applications. Its 2000-hour load life at 105°C and clear leakage and tan δ specifications allow designers to plan for long-term performance in thermally challenging environments.

Manufactured by Nichicon and RoHS compliant, this part is appropriate for engineers seeking a verified, specification-driven aluminum electrolytic solution for compact high-voltage circuits that require reliable ripple handling and predictable aging behavior.

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