680uF 16V SMD Capacitor (Pack of 20)

It seems there might be some confusion in the description you provided.

An aluminum electrolytic capacitor typically consists of a layer of oxide that acts as the dielectric between the two electrodes. However, aluminum electrolytic capacitors are primarily through-hole components rather than surface-mount devices (SMD).

On the other hand, polymer capacitors, especially polymer aluminum electrolytic capacitors, do exist and are commonly used in SMD form. They utilize a conductive polymer as the electrolyte instead of the traditional liquid or gel electrolyte found in conventional electrolytic capacitors.

So, if we consider the specifications provided:

• Type: Surface-mount polymer aluminum electrolytic capacitor
• Capacitance: 680 microfarads (uF)
• Voltage Rating: 16 volts (V)
• Dielectric: Polymer electrolyte, which acts as the insulator between the electrode’s relative conductors.

This type of capacitor is known for its high reliability, long lifespan, and low equivalent series resistance (ESR). They are frequently used in various electronic devices, including computers, telecommunications equipment, and power supplies, where stable and high-capacity energy storage is required in a compact form factor.