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Material identification and inspection of the main parameters of SMD capacitor

Source: Industry News Editor: PingShang Click: Release time: 2020-12-28 08:35:36

The parameters of the SMD capacitor:

      Capacity and error: the maximum allowable deviation range between the actual capacity and the nominal capacity. Generally used capacity errors are: Class J + 5%, Class K + 10%, Class M + 20%.

      Rated working voltage: The SMD capacitor can work stably and reliably for a long time in the circuit, and the maximum DC voltage it can withstand is also called withstand voltage. For devices with the same structure, medium and capacity, the withstand voltage increases and the volume is the smallest.


Temperature coefficient: within a certain temperature range, the relative change value of capacitance for every 1℃ temperature change. The smaller the temperature coefficient, the better.

      Generally, a small-capacity capacitor has a large insulation resistance, in the hundreds of megaohms or several gigaohms.

      Packages usually include: 0402, 0603, 0805, 1206, etc. If marked, all the SMD capacitor bodie have no markings, and the markings can be seen on the capacitor packaging.


Inspection: Mainly inspect its capacity F, package specifications, accuracy error %, withstand voltage V, insulation resistance Ω, temperature coefficient ℃.

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