Solid-state capacitors, also known as solid aluminum electrolytic capacitors, differ from traditional electrolytic capacitors (which use liquid electrolyte) primarily in the type of dielectric material they use. While liquid aluminum electrolytic capacitors use an electrolyte solution, solid-state capacitors use a conductive polymer.
Benefits of Solid-State Capacitors
Explosion Resistance (No “Spilling”)
Solid-state capacitors use a high-polymer dielectric, which has lower expansion or reactivity compared to liquid electrolytes, especially under high temperatures. The boiling point of these solid-state materials is around 350°C, making the risk of "exploding" or "spilling" almost nonexistent.
Longer Lifespan and Greater Stability
Solid-state capacitors are more stable and have a much longer lifespan compared to traditional electrolytic capacitors. They perform better in terms of reliability over time, even under extreme conditions.
Lower Equivalent Series Resistance (ESR)
Solid-state capacitors show superior performance in terms of equivalent series resistance (ESR). At high frequencies, solid-state capacitors exhibit very low ESR, offering excellent conductivity and lower heat output. Their performance is especially good in the frequency range from 100 kHz to 10 MHz.
Less Temperature Sensitivity
Traditional electrolytic capacitors are more susceptible to changes in environmental temperature and humidity, which can affect their performance. In contrast, solid-state capacitors are far less sensitive to temperature variations, maintaining a stable ESR from -55°C to 105°C. Their ESR remains between 0.1 to 0.3 ohms, while electrolytic capacitors will vary in their resistance with temperature changes.
How to Distinguish Solid-State Capacitors from Electrolytic Capacitors
A simple way to differentiate solid-state capacitors from traditional electrolytic capacitors is by looking at the top of the capacitor. Solid-state capacitors typically do not have any grooves or slits on the top, while electrolytic capacitors feature slits or grooves designed to prevent rupture when exposed to high heat, allowing the gas to escape.
About US
UF Capacitors is an ISO9001-certified manufacturer in China, founded in 1995. Focus on different level of capacitors including ceramic capacitor, aluminum capacitor, film capacitor, and tantalum capacitor,etc.
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