STA Solenoid Locking Safety Switch


EUCHNER STA Safety Switches are used to protect personnel by monitoring and interrupting the safety circuit depending on the position of the machine guard. The locking solenoid holds the guard closed until a stored energy hazard has dissipated. It can also prevent damage to a part in process due to an inadvertent machine shutdown. To meet current worldwide standards, safety interlock components cannot be easily bypassed. These switches have positive opening contacts and redundancy to guarantee that they fail to a safe state. The robust metal safety switch STA is dimension-compatible with the proven EUCHNER safety switches TP and STP in plastic housing.



  • Solenoid locking
  • Narrow metal body housing and metal actuating head
  • Rotatable actuator head with top and side entry
  • Actuator insertion funnel increases entry area
  • Straight, bent, and hinged actuators available
  • Straight and bent actuators with overtravel
  • Actuator overtravel minimizes end stop potential
  • 4 contacts
    • 2 NC positively driven safety contacts
    • Annunciation contacts
    • Door and solenoid monitoring contacts
  • 3 cable entries
    • Eases installation
  • Versions with LED's


  • Durable metal actuator head and body
  • Multiple contacts helps to achieve the highest level of safety
  • Narrow housing
    • Perfect for extruded aluminum guarding
  • High locking force (2500N)
  • Manual bypass
    • Simple front bypass


  • Die-cast aluminum actuator head and housing
  • Environmental protection IP67- oil and dust tight, and water resistant
  • Ambient operating temperature -20 to 55C
  • 4 contact elements
    • Low current contacts
    • Silver alloy, gold flashed
  • Solenoid
    • Mechanical locking or electrical locking
  • Voltages
    • 24 VAC/DC
    • 110 VAC
    • 220 VAC

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