I want to implement a 12V relay (https://www.mouser.com/ProductDetail/Panasonic-Industrial-Devices/TX2SA-12V?qs=HLLy2pIPwuuBcCVwky7PWw%3D%3D) in an automotive application.
I will be using the car's 12V battery power to control the relay coil. The signal I am switching is battery 12V going into a high impedance input, so very little current will flow through the contacts, necessitating the use of a small signal relay.
Using a transistor is not possible as there would be no voltage drop between gate and source since this is not a low/high side switch.
I am concerned because I cannot find a small signal relay rated for automotive use, particularly vibration. I am also concerned how the relay coil will respond to the noisy battery power, and whether I will experience unexpected switching under conditions such as load dump or starting.
Is this a valid concern, and if so, what measures should I take to prevent issues?