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Trapped Key Solenoid Release Unit

Our Trapped Key Solenoid Release Unit electrically isolates machinery to improve access safety.?The unit?consists of a rotary power switch and a solenoid. The trapped key can be removed once an external signal is given to its internal solenoid locking mechanism. An indicator light on the solenoid release unit shows when the trapped key can be removed—that is, when power is applied to the solenoid. The solenoid signal only needs to be present when key removal is necessary.

Popular Resources/Quicklinks
Safety Switches Brochure Safety Switches Specifications Technical Data Solenoid Key Release Unit - SRUE


  • Direct drive operation positively opens contacts
  • Integral solenoid monitoring
  • Key trapped until release signal is applied
  • Lighted or neon 'key free' status indicator
  • 316L stainless steel construction
  • 24V DC, 110V AC or 230V AC solenoid options
  • Weatherproof stainless steel dust cap
  • UL and CSA approval on switches
  • Single or multiple key units available
  • Replaceable code barrel assembly
  • Available with up to 4 keys
Additional Information

Protect your people, productivity, and environment with our?Safety Components and integrated Safety Solutions. We understand your factory floor challenges and can help you meet your goals with one of the broadest safety portfolios in the industry.

Product Selection


  • BG
  • CE Marked for all applicable directives
Standards Compliance
  • EN 1954-1
  • IEC/EN 60204-1
  • EN 1088
  • IEC/EN 60947-5-1
  • ISO 13849-1
  • ISO 12100-1&2
  • ISO 14119
  • GS-ET-19
  • AS 4024.1?
Looking for Additional Information?

To find additional product information including CAD drawing files, 3D models and more use our Product Catalog.


Resource Publication Number Language
Safety Switches Brochure GLSAFE-BR002
Safety Switches Specifications Technical Data SWITCH-TD001
Solenoid Key Release Unit - SRUE 440T-IN031
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