P600 may refer to: P600 (neuroscience), an event-related potential or peak in electrical brain activity measured by electroencephalography P600 NEMA contact ratings, the contact rating of smaller NEMA contactors and relays Sendo P600, a model of mobile phone manufactured by Sendo An identifier for Interleukin 13, a cytokine protein P600 (mountain), a classification for mountains, used in the British Isles