The 3SE2120-1C is a Siemens metal limit switch with snap-action contacts (1NO+1NC) and an overtravel plunger actuator (Type B). It features M20 x 1.5 threading for mounting. However, this product has been discontinued since May 31, 2012, and its successor is the 3SE5112-0CC02.

Type: Position switch, metal-enclosed

Contacts: 1 Normally Open (NO) + 1 Normally Closed (NC)

Actuator: Overtravel plunger (Type B)

Threading: M20 x 1.5

Lifecycle: Discontinued since May 31, 2012 (Successor: 3SE5112-0CC02)