SDC Security Door Controls 25-4U Electric Door Strike

30% Off MSRP

SDC Security Door Controls 25-4U Electric Door Strike

$102.90 $147.00


SDC 25 Series Electric Strike for 5/8 inch Latch, Latch Position Status Output, Field Reversable Failsafe/Failsecure, 12/24VDC, 4-7/8 Square Corner Stainless Steel Faceplate.

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Product Details

Product Overview

The SDC 25 Series electric strike is designed for use with cylindrical locksets with up to 15mm throw latchbolt. The compact low profile design with an internally mounted solenoid and factory supplied mounting tabs enable quick and easy installation where jamb space is limited. The heavy duty construction makes the 25 Series ideal for high traffic installations.

SDC’s 25 series value 1/2” latchbolt electric strikes are centerline latch entry strikes designed for use with cylindrical locksets and metal frames. 25 series strikes accept 1/2” throw latchbolts or up to 9/16” throw latchbolts with 1/8” door gap.


  • Fail-Secure - Field reversible for failsafe operation
  • For 1/2 inch latch or 5/8 inch latch with 1/8 inch door gap
  • Latch status output, 3amp - SPDT
  • Non-handed, reversible
  • All stainless steel parts with durable diecast body for corrosion resistance
  • 630 Stainless steel standard finish
  • ANSI A156.31 compliant


  • 25-4U: 4-7/8 inches (124mm) Square Corner faceplate for hollow metal frames. *retrofit tabs included


  • RMB Buzzer 12/24V AC/DC operation
  • BR64XL Rectifier for AC operation


  • Input: 200/100 mA @ 12/24VDC
  • Latch Status: SPDT, 3amp @ 30VDC


  • 1-1/4 inches W x 4-7/8 inches H x 1-1/4 inches D(31.8W x 124H x 31.8D mm)
Also Known As
254U, SZ-254U, SDC-254U
Stainless Steel
For Use With
Cylindrical Locksets, Hollow Metal Door Jambs
SDC Security
Manufacturer Warranty
2 Year
Model Number
Power Requirements
Status Monitor
UPC Code
2 Questions asked on SDC Security Door Controls 25-4U Electric Door Strike

Q Nicole Gonzalez • 12/29/2021, 12:40:43 PM If the power goes out and the battery goes out and somehow this system fails all together, how does the lock default? Will it stay locked or remain open?
A 12/29/2021, 3:24:20 PM The default setting on the 25-4u would be fail-secure (locked when all power is lost). It can also be configured for fail-safe (unlocked when all power is lost) by adjusting a screw on the device. For more information on this product feel free to give us a call at 1-866-500-5625
Q Michael Jacobs • 12/13/2022, 11:57:53 AM Does the latch status monitor the door strike itself (i.e. locked/unlocked), or the presence of a door latch (door open/closed)?
A 12/15/2022, 4:28:19 PM The Latch Bolt Monitor sensor on the 25-4u Electric Strike will monitor the presence of a door latch (door open/closed). If you are looking to monitor the status of the keeper (strike is secure yes/no) then please see the SDC 45 series electric strike that features a Deadlocked Status monitor standard. For further assistance please give us a call at 1-866-500-5625