Ajax DoorProtect Black Front View MC420B
Ajax DoorProtect Black Front View MC420B
Ajax DoorProtect Black 3-Way View MC420B
Ajax DoorProtect Black Indoor Application View MC420B
Indoor Application MC420B

Ajax DoorProtect Black

R 934.00 Incl. VAT
R 0.00 Incl. VAT

Available to order online or collect at 6 Cosmic Street Linbro Park, Sandton, 2090 (Map)


Spec Data Sheet Button

The Ajax DoorProtect Black is a wireless opening detector that notifies of first signs of room intrusion by means of a broken door or window. It can be mounted on all types of doors including a metal base.

Please note: DoorProtect operates within the Ajax system, connected to the hub via the protected Jeweller protocol.

Compatible with all Ajax hubs, range extenders, ocBridge Plus, uartBridge

Product Code: 7062.03.BL1


  • Wireless Indoor detector
  • Built-in battery (lasts up to 7 years)
  • Communication range of 1200m (in an open space/line of sight)
  • DoorProtect opening sensor protects even windows that are open for ventilation
  • External contact is available for connecting third-party detectors
  • Includes magnets of various sizes for installation on narrow frames and door frames
  • The device consists of two modules detector and magnet.
  • Using the uartBridge or ocBridge Plus integration modules, DoorProtect can be used as part of third party security systems.
  • Tamper resistant
  • Detector is set up via the Ajax app for iOS, Android, macOS and Windows
  • System notifications delivered via push notifications, SMS and calls (if activated)
  • Quick and Easy installation



The Ajax DoorProtect comes ready to operate straight out the box.

The battery is pre-installed, so there is no need to disassemble the detector.

With one click, it can be connected to the hub in the mobile application. It can be mounted on the SmartBracket in just a few minutes.

The Ajax security system is self-sustaining, but the user can connect it to the central monitoring station of a private security company.


Compatibility Operates with all Ajax hubs, range extenders, ocBridge Plus, uartBridge
Classification Point magnetic and contact radio channel security detector
Type of detector Wireless
Installation method Indoors
Sensing element Reed switch
Alarm signal delivery time 0.15 s
Activation threshold Small magnet - 1 cm
Big magnet - 2 cm
Power supply CR123A battery, 3V
Battery life Up to 7 years
Communication range with central unit Up to 1,200 m in an open space
Two-way communication between devices Yes
Operating frequencies 868.0-868.6 MHz
Self-adjusting RF output power Up to 20 Mw
Block encryption based on AES algorithm Yes
Detector polling period 12−300 s
Temperature sensor Available
Operating temperature range From -10°С to +40°С
Permissible humidity Up to 75%
Protection against fraud Yes
Jamming detection Yes
Tamper-resistant Yes
Remote setting and testing Yes
Certification Grade 2, CE
Product Dimensions Diameter: 20 mm & Height: 90 mm
Product Weight 29g
Packaging Dimensions 99 mm x 57 mm x 32 mm
Mass of unit packed 200g
Warranty 24 months limited Manufacturer’s warranty. Batteries are not covered under warranty.



1 x Ajax DoorProtect Black

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