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You can consult the official testing agency that does EN50155 certification.

Thank you for your sharing. In fact, the reason why EN50155 is mentioned is mainly because I mainly contact car chargers a lot. At work, I encounter someone who asks whether the product has this certification.

I'am sorry, i can not answer your question. Regarding whether the trucks you mentioned are in compliance with EN50155, you need to send them for testing and see if the results pass.

Thank you for your reply, I just want to express what is the difference between the ordinary car usb socket and the car usb socket that has been tested by EN50155, in fact, mainly because of the test items included in this test

EN50155 type test is to do environmental adaptability test, electromagnetic compatibility test, electrical safety test and other testing items of electronic equipment of railway vehicles. EN50155:2017 can be applied to all control, regulation, protection, diagnosis and other electronic equipment...