The Sarr Teln class was a type of warship used by the Breen Confederacy during the 24th century. (The Dominion War Sourcebook: The Fires of Armageddon)
In 2410, the Leinstien, a Sarr Theln-class warship, harassed a Deferi colony world until the Deferi were inspired to stand up to them and drive them out. (Star Trek: Phoenix-X: "Neutrality for Beginners")