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Electric Key Override Deadlocking Bolt DB25KO Electric Key Override Deadlocking Bolt DB25KO
DB25KO 201

Electric Key Override Deadlocking Bolt DB25KO

The Alpro DB25KO deadlocking key override bolt offers the same functionality as the standard DB25 deadlocking bolt with provision for a europrofile cylinder as a means of mechanical override.  The slimline design of the DB25KO enables fixing into very narrow sections. An advanced microprocessor module provides power reduction allowing continuous operation without heat generation.

Features include

  • High Physical Security
  • Robust Constructions
  • Versatile Installation
  • Triple Monitoring
  • 5 Year Guarantee

  • Specification
  • Order info
  • Documents
  • FAQs


High Physical Security
Holding force 1,000kg - automatic deadlocking
Bolt throw 16mm

Robust Construction
All stainless steel bolt of 12.7mm diameter, linkages and springs. 3mm stainless steel
faceplate and strike plates with fully enclosed mechanism.

Maintained Key Override
Using standard Euro profile cylinder case pierced both sides for operation either side.

Versatile Installation
Designed to provide concealed high security locking on any single or double action, hinged or sliding door in timber or metal for vertical or horizontal mounting.

Slimline Dimensions
280mm(L) x 25mm(W) x 42mm(D)
Back box 230mm(L) x 22mm(W) x 42mm(D)


Multiple Voltage Input
Any voltage from 12v DC -10% to 24v DC +15%.
Complete with built in transient and reverse polarity protection and continuously rated

Low Current Consumption
Volts Current - Activate Current - Hold (after 200ms)
12vDC 1100mA 210mA
24vDC 1000mA 90mA

Triple Monitoring
Bolt, Door and Key position switches

Stainless steel surface mount kit.


Built-in Access Control Module

Selectable unlock period - a field selector timer once the bolt is signalled to unlock. This enables traffic exiting 0, 3, 6 or 9 seconds in which to open the door before it automatically locks. See Anti-Tailgate.

Multiple auto relock function - when relocking the bolt makes 9 locking attempts over 18 seconds. Change in the Bolt Position Switch status indicates that the door has been locked.  Fail open/PTL models only.

Multiple unlock function - in fail secure/PTO mode 5 attempts to unlock door at 2 seconds intervals.

Anti-Tailgate - once the door has been pushed open and closed during the chosen unlock period, the bolt will immediately relock.


Order info

12-24vDC slimline key override deadlocking boltFail open/
12-24vDC slimline key override deadlocking boltFail secure/


Surface mounting kit comprising surface mount housing, surface mount
strike box & long strike plate
Extras for glass applications - kit comprising 2 stainless steel dress platesDB25KO/SMK-DP
Long strike plate - replacementDB25KO/LONG
Half europrofile cylinder - keyed alike 40mm5224
Half europrofile cylinder - keyed differ 40mm5222




Is there a charge for delivery?

Carriage and packing are included in orders over £250.00. A charge of £10.00 is made on lower value orders to cover carriage, packing and insurance. For deliveries to Ireland please speak to the office for pricing.

What guarantees does Alpro give?

6 years for AL110/AL150/AL2000 series electric strikes
5 years for EMS1200 shearlocks/EB250 solenoid bolts/DB25 deadlocking bolts
3 years for EB1001 &EB501 electric bolts/door hardware

Do you have any information on CE Marking or CE Marking of Doorsets?

Please refer to our technical section under Standards.


Highlighted Video

EL900 ANSI Electric Strike - Simple Fail Safe - Fail Secure Changeover

Technical Support