UHW1H681MHD

The UHW1H681MHD is a miniature, high-reliability aluminum electrolytic capacitor in a radial-lead can from Nichicon’s UHW series. It delivers 680 µF capacitance at a 50 V rating with polarization and is designed for general-purpose power applications requiring high ripple handling and extended endurance.

With a compact φ12.5 × 25 mm case, low impedance and specified ripple current performance across low and high frequencies, this part targets power-smoothing, decoupling and energy-storage roles where long life and temperature robustness are required.

Key Features

• Capacitance & Rated Voltage — 680 µF at 50 V, with capacitance tolerance of −20% to +20% for predictable bulk energy storage.
• High ripple current capability — Low-frequency ripple current rated at 1.68 A (120 Hz) and high-frequency ripple current rated at 2.8 A (10 kHz), supporting effective ripple suppression across a range of switching frequencies.
• Low impedance — Specified impedance of 69 mΩ supports lower loss and improved filtering performance in power rails.
• Long endurance — Rated life of 10,000 hours at 105°C under DC bias plus rated ripple current, providing extended reliability in elevated-temperature environments.
• Wide operating temperature — −40°C to +105°C operating range for temperature-resilient performance.
• Compact radial-can package — φ12.5 mm diameter × 25 mm length with 5 mm lead spacing (±0.5 mm), radial lead mounting for through-hole assemblies and bulk/bag packing options.
• RoHS compliant — Manufactured in compliance with RoHS requirements.
• Series benefits (UHW) — Designed for lower impedance at high frequency and smaller case size while maintaining high ripple current capability, per the UHW series specifications.

Typical Applications

• Power-supply filtering — Bulk decoupling and smoothing where 680 µF capacitance and 50 V rating are required to reduce output ripple and stabilize DC rails.
• Switch-mode power supplies — Handling ripple currents at both low (120 Hz) and high (10 kHz) frequencies to support switching regulator output stages.
• Energy storage and hold-up — Short-term energy buffering in general-purpose circuits that benefit from compact, high-capacitance components with extended endurance.
• Industrial and instrumentation electronics — General-purpose power conditioning in equipment that operates across −40°C to +105°C and requires durable capacitors with long rated life.

Unique Advantages

• High ripple tolerance matched to switching environments: Specified ripple currents at 120 Hz and 10 kHz (1.68 A and 2.8 A) allow designers to select a capacitor sized for both low- and high-frequency ripple conditions.
• Low-loss performance: 69 mΩ impedance helps minimize voltage drop and power dissipation in power-rail applications.
• Extended operational life at elevated temperature: 10,000 hours endurance at 105°C under rated conditions supports long-term reliability in thermally demanding designs.
• Compact footprint for through-hole assembly: φ12.5 × 25 mm radial can with 5 mm lead spacing offers a small form factor for space-constrained boards while retaining high capacitance.
• RoHS compliance: Conforms to RoHS directive, simplifying regulatory considerations for lead-free assemblies.
• Series-level design optimizations: UHW-series characteristics such as lower high-frequency impedance and miniature sizing provide targeted performance for modern power electronics.

Why Choose UHW1H681MHD?

UHW1H681MHD positions itself as a compact, durable solution for general-purpose power conditioning where 680 µF at 50 V is required. Its combination of low impedance, high ripple-current ratings across frequency ranges, and a 10,000-hour endurance at 105°C make it suitable for designs that demand sustained performance in elevated-temperature environments.

This part is well suited to engineers specifying through-hole capacitors for power supplies, switching regulators, and energy-storage roles who need measurable ripple handling, predictable impedance, and long-term reliability backed by Nichicon’s UHW series specifications.

If you would like a quote or have questions about integrating UHW1H681MHD into your design, submit a request for pricing or contact sales to discuss availability and packaging options.