Schaffner Immobilizer Antenna

Immobilizer Antennas

Prevent an unwanted startup of a car

Immobilizer Antennas, also called keylock cylinder antennas, are placed in the ignition switch lock cylinder, inside a car.  The system with an immobilizer antenna is to prevent an unwanted startup of a car.

The main function of Schaffner immobilizer antenna is to emit radio frequency signal and identify owner’s key in the ignition system.


  • Resonance frequency of  antenna: 125 kHz, 134.5 kHz
  • Inductance range: 300 uH - 1 mH
  • Maximum current: 1 A
  • Mechanical robustness
  • Over molded with IP 67 classifications
  • Customization in accordance with customer's design is available upon request