UHW1H821MHD

The UHW1H821MHD is a miniature, high-reliability aluminum electrolytic capacitor from Nichicon’s UHW series. It is a radial lead, polarized capacitor specified at 820 µF and 50 V, optimized for applications requiring high ripple current handling and low impedance in a compact can.

Designed for general-purpose electronic designs, the UHW1H821MHD combines a compact φ12.5 × 25 mm can, wide operating temperature range of −40°C to 105°C, and a 10,000-hour endurance rating at 105°C to support durable, long-life power filtering and decoupling in demanding environments.

Key Features

• Capacitance & Voltage — 820 µF capacitance with a 50 V rated voltage; capacitance tolerance is −20% to +20% at 120 Hz, 20°C.
• High Ripple Current — Low-frequency ripple current of 1.68 A (120 Hz) and high-frequency ripple current of 2.8 A (10 kHz), enabling effective smoothing under AC and switching loads.
• Low Impedance — Specified impedance of 69 mΩ supports reduced voltage ripple and improved transient response in power circuits.
• Thermal & Endurance — Rated for operation from −40°C to 105°C with a lifetime/endurance of 10,000 hours at 105°C.
• Loss Characteristics — Tangent of loss angle (tan δ) of 0.10 at 20°C, 120 Hz, supporting predictable dissipation characteristics.
• Leakage Current — Specified leakage current of 410 µA to help quantify standby and quiescent losses.
• Compact Radial Can — Size φ12.5 × 25 mm, radial lead mounting with 5 mm lead spacing (±0.5 mm), available in bulk or bag packing for assembly flexibility.
• Environmental Compliance — RoHS compliant.

Typical Applications

• General-purpose power filtering — Bulk energy storage and smoothing for power rails in general electronic designs.
• Switching power supplies — Filtering and ripple suppression where high ripple current capability and low impedance are required.
• Industrial and commercial electronics — Long-life, high-temperature endurance for applications exposed to elevated operating temperatures.

Unique Advantages

• High ripple handling: Rated ripple currents of 1.68 A (120 Hz) and 2.8 A (10 kHz) reduce voltage ripple in both low- and high-frequency environments.
• Low impedance: 69 mΩ impedance improves transient response and minimizes losses in power distribution networks.
• Extended endurance at elevated temperatures: 10,000 hours at 105°C supports longer service life in thermally demanding systems.
• Compact footprint: φ12.5 × 25 mm radial can provides high capacitance in a small package for space-constrained designs.
• Predictable leakage and dissipation: Specified leakage current (410 µA) and tan δ (0.10) enable accurate thermal and power-loss budgeting.
• RoHS compliant: Meets environmental requirements for restricted substances.

Why Choose UHW1H821MHD?

The UHW1H821MHD positions itself as a compact, high-reliability aluminum electrolytic solution for designers needing substantial capacitance and ripple performance in a small radial can. Its combination of high ripple current capability, low impedance, and a 10,000-hour rating at 105°C makes it suitable for general-purpose power filtering and decoupling tasks where long-term thermal endurance matters.

This part is well suited to engineers and procurement teams designing or sourcing components for power supplies, converters, and other electronic systems that demand reliable bulk capacitance in a compact, through-hole package. Its clear electrical specifications help with predictable thermal and electrical system design and lifecycle planning.

If you would like pricing, lead-time, or availability information for UHW1H821MHD, request a quote or submit an inquiry and our team will respond with the details you need.