Cigarette lighter plug amps?

[BrizzoDaIzzo]

Does anyone know what the amperage rating on the cigarette lighter power adapter in the front cab is? I know it’s hooked to a 50 amp fuse on the passenger side fuse panel, but that seems huge for a cigarette lighter. at the most, all I’ve ever seen was 10 amps.  But this is literally hooked to a 50 amp fuse.  Wanted to check before I split it and hook some accessories to it. Can’t find a solid answer.