Electric strike for fire protection doors (FT-series)

FT503-FB * Electric strike with door status contact, thickened adjustable keep and lock latch guide

Electric strike for fire protection doors FT 503-FB WEB
  • Approved for smoke and fire protection doors
  • Almost silent opening behaviour with direct current with one click
  • Twin coil technology enables a larger operating voltage range
  • Integrated bipolar EMC protective diode which protects connected electronic components against reverse voltage
  • Door status contact, which is activated by the lock latch
  • Compact dimensions
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  • Lock latch guide for installation in doors with closed profile edge
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Application Areas

  • Fire protection doors with swing door drives and access control
  • Installation possible on left and right hand doors as well as horizontal or vertical
  • Connection to direct or alternating current

Technical data

Dimensions 22.8 x 64.6 x 27.7 mm
DIN direction left / right
Set position x grid dimension 4 x 0.75 mm
Latch engagement depth 6.5 mm
Installation position vertical / horizontal Yes
Fail-secure Yes
Continuous operation voltage 12 - 24V AC/DC
Approval for smoke protection doors Yes
Suitability for fire protection doors Yes
Door monitoring Yes
Bipolar EMC protection diode integrated Yes
Twin coil technology Yes

Variants & Accessories


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