The Hughes Autoformer Spike Board 50A is a replacement module for the 50A Autoformer. This 4, 800 joule replacement module is a plug-and-play replacement. If your Hughes Autoformer surge module goes out, there's no need to replace the whole unit. The replacement module is easy to install. No soldering or wire splicing is needed. The Spike Board 50A Module comes with the module, a drill bit, and 4 machine screws â everything you need to replace the module. Plug-and-play replacement No soldering or splicing needed Comes with module, drill bit, & 4 machine screws | Hughes Autoformers Hughes Autoformer Spike Board 50A Replacement Module