Surge protection for control and instrumentation signals (C&I)
Yes the expected voltage or current surges are all different for AC line, analog high Z and Logic high speed CMOS.  

the only common surge is ESD finger model 100pF 3kV and line surge 3kV 1/10us or similar... but the protections may be low capacitance, high speed, super high current, TVS, line filter attenuators, CM chokes etc etc.