Security Systems

Delphi Battery Backed Sounder

A vital component of a vehicle's anti-theft system, Delphi's battery backed sounder helps to generate an alarm when intrusion or tow-away theft is sensed. With up to a 10-year battery life, the sounder generates an acoustic alarm even when disconnected from the vehicle battery.

The Delphi Advantage

  • Experience
    • More than 20 years of experience in design and manufacturing of alarm system components
    • More than 1.5 million units produced annually
    • Global design and manufacturing footprint
    • Testing and vehicle integration expertise
  • Performance
    • Small compact battery backed siren from market leading OE security system supplier
    • Integrated into vehicle E/E architecture via LIN bus to BCM
  • Value
    • Extremely high quality performance
    • Compliant with Thatcham, 95/56/EC and R116 type approval regulations
    • Acoustical simulation expertise
    • Siren's sound can be customized to meet customer requirements


  • Generates acoustic alarm
  • Outside sound generator (buzzer, horn)
  • Delphi charging algorithm extends life of back-up battery 
  • Up to 10-year battery life
  • High sound pressure level: 105 dB(A)@2m
  • Optional integrated inclination sensor

In Mass Production


  • Mechanical / Environmental
    • Current consumption: Below 1mA (armed mode)
    • IP class (with connector): IP67
    • Housing: Plastic PBT-GF30
    • Weight: 150g
    • Operating temperature range: -40° to +85°C
  • Inputs / Outputs
    • Connector: 3-way MQS Tyco connector
    • LIN interface
    • +12V
    • GND
  • Optional Inclination Sensor
    • Measuring range: ±25° angle
    • Alarm angle accuracy: ±0.1° angle
    • Sensitivity: ≤(0.1)°
    • Alarm angle range: 0.8 to 5.0°
    • Sample rate:2/8Hz