Compressors and air conditioners can have startup surges several times their running current.  If the max surge rating of the ITC-1000F (12V version specifically) is limited to 10A,  then safe running currents of 3 amps or less would seem appropriate for these applications.  This would make the device not appropriate for many applications people are attempting to use it for....
 Is this a valid consideration ?
Is there a surge handling capability on the contacts ?