Now that POWER SERIES™ power controllers have reached end-of-life status, transitioning to ASPYRE® power controllers is critical to keep process running. This guide is designed to outline the electrical, mechanical and ordering differences between these devices to ease the transition. Note, this guide is in reference to 60 amp to 210 amp ASPYRE devices only. For other current guide is in reference to 60 amp to 210 amp ASPYRE devices only. For other current specification, please consult the ASPYRE specification sheets or your local Watlow® sales representative.