A cap (27) for a temperature-dependent switch (10) having a first connection area (22) and at least one second connection area (23) on the outer surface of its housing (11, 12) for the purpose of electrically connecting leads (25, 26) is designed as a cup-like surrounding housing that can be pushed onto the switch (10), preferably with an accurate fit, such that the connection areas (22, 23) for electrical connection are accessible from the outside after said surrounding housing has been pushed on, whereby a first opening (28) for the first connection area (22) and a second opening (29) for the second connection area (23) are provided in said cap (27).