schneider electric has a security sticker on the side of the switch. There is a bar code and Schneider's LOGO (trademark, an inclined ellipse with an S inside) on it. You paint it with some red or black ink, and then wipe it off immediately. The ink will highlight the trademark alone. The reason is that the LOGO (trademark) on this post is punched with a laser punch, which will leave ink.

The cost of this post is relatively high, and others can't imitate it, so you can use this method to test the authenticity of switches and circuit breakers.

Contactors don't have this thing because of the cost, so they can only be distinguished from workmanship and printing. It is recommended to buy it from a regular agent, and you can basically rest assured. . .