Yes, JUDAS is a Scrabble word!

Letter values in Scrabble US: J 8, U 1, D 2, A 1, S 1.

Is it a valid word?

JUDAS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

(New Testament) supposed brother of St. James; one of the Apostles who is invoked in prayer when a situation seems hopeless
(New Testament) the Apostle who betrayed Jesus to his enemies for 30 pieces of silver
someone who betrays under the guise of friendship
a one-way peephole in a door
an ancient kingdom of southern Palestine with Jerusalem as its center

Also: saint jude, st. jude, judas iscariot.

Not playable in Scrabble US: JUDE, THADDAEUS, JUDAH, JUDA.