I am currently designing a device that is intended to be used outside the car and supplied by car 12V socket (also during the drive).
The question is: Are there any specific requirements for example international standards related to this kind of devices? Is there any EMC certification required before allowing the device to be sold?
Usually in case of devices designed for automotive market, OEMs define this kind of requirements, it's a little bit different story since the device could be used in any car/truck and is not an actual car part.
I am aware that the device should be both protected against potential supply line disturbances [cold cranking, over-voltage etc.] and also not generate any disturbances/conducted emission backwards. But how to define actual limits?
I believe most of modern cars 12V sockets are filtered and protected against potential short circuit / conducted emission, but this cannot be guaranteed right?