Security fail-unlocked strike 331URF 331URF

Product description

Model with monitoring contact as potential-free changeover contact, actuated by the latch bolt.

With adjustable FaFix® latch and keeper alignment.

The 331U Model Series is guaranteed to work reliably in interlock systems, on soundproofed doors and on doors where pressure on the keeper is expected due to the structural design.

Overview of Advantages

  • Monitoring contact
  • Recovery diode
  • Reliable unlocking under preload
  • Sturdy design for demanding requirements
  • FaFix® latch with 2 mm adjustment range


  • Can only be used as a supplementary locking device on fire doors
Technical data
Variants that can be ordered