Fast Power Switch is no longer in production.
The APS100 Fast Power Switch is a very successful product funded in part by the SBIR (Small Business Innovative Research) programs at the Navy and in coordination with JPL. The specialized product was used at JPL for avionics testing. As avionics testing has improved and migrated to newer technology, the Fast Power Switch is no longer available.
Please consider Vektrex SpikeSafe Performance Series Precision Pulsed Current Sources for your accurate current and fast pulse needs.