No, contact cleaners and brake cleaners are not the same. While contact cleaners are used to clean electrical connections to prevent moisture, brake cleaners are used to remove oil, dirt, and debris. Also, contact cleaners are plastic-friendly, while brake cleaners are suitable for metal parts only.  If you have a brake cleaner with no contact cleaner, using a brake cleaner as a substitute will only leave you with damaged electronics. In contrast, you can use a contact cleaner instead of a brake cleaner; however, it won't be as effective as a brake cleaner, and it will only cost you more money.