STP Series Solenoid Locking Safety Switch


EUCHNER STP 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 passed. 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 STP is a narrow profile thermoplastic housing with metal head in many variations to meet a variety of different needs.

   You might also be interested in our STP Twin switches.   


  • Solenoid locking
  • Narrow plastic body housing with metal actuator head
  • Rotatable actuator head with top and side entry
  • Actuator insertion funnel increases entry area
  • Variety of actuators available
  • Up To 4 Contacts
    • NC positively driven safety contacts
    • Annunciation contacts
    • Door and solenoid monitoring contacts
  • 3 cable entries
    • Eases installation
  • Custom versions available
  • Versions with LED's


  • Durable metal actuator head
  • Multiple contacts helps to achieve the highest level of safety
  • Narrow housing
    • Perfect for extruded aluminum guarding
  • Pre-wired plug connector
    • Reduces installation cost
    • Eliminates miswiring
  • High locking force (562 lbs)
  • Manual bypass
    • Simple front bypass
    • Optional security key bypass
    • Optional rear release bypass
  • Optional rear cable entry


  • Die-cast aluminum actuator head
  • Reinforced thermoplastic housing
  • Environmental protection IP67- oil and dust tight, and water resistant
  • Ambient operating temperature -20 to 55C
  • Contacts - 2 or 4 elements
    • Low current contacts
    • Silver alloy, gold flashed
    • Up to 4 NC positively driven contacts
    • Optional plug connector
  • Solenoid
    • Mechanical locking or electrical locking
  • Voltages
    • 24 VAC/DC
    • 110 VAC
    • 220 VAC

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