Reactor is an indispensable important component of the entire power system. The reactor generally used in the frequency converter can not only prevent the interference from the grid, but also reduce the pollution of the grid by the harmonic current generated by the rectifier unit. Therefore, the choice of its insulating material must be cautious. Relevant departments have determined that today's FR4 epoxy board is the best insulation material for reactors.

Next, let's take a concrete look at why FR4 epoxy board is used as an insulating material?

FR4 is made of epoxy resin impregnated with electrical glass cloth by high temperature and hot pressing. It has the characteristics of good insulation, high temperature resistance, and good mechanical strength. And there is no need for regular testing, which greatly saves manpower and material resources. The high temperature resistance of FR4 can reach 160 degrees. Even in the scorching summer, there is no worry that it will not cause any malfunction due to the high temperature, which will endanger people's lives and property.

Take a look at the physical parameters of FR4 epoxy board：

(1) Specifications: 1020mm*1220mm; 1220mm*2440mm

(2) Color: yellow, green, black;

(3) Water absorption: (D-24/23, plate thickness 1.6mm): ≤19mg;

(4) Density: 1.9-2.1g/cm;

(5) Flammability rating: UL 94V-0.

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