Electromechanical horn S92

Sound for greater safety: Signal horns are required in vehicles by law so that other road users can be made aware of dangerous situations in a clearly audible manner. With its full sound, the HELLA S92 horn is particularly suitable for commercial vehicles. It generates maximum attention with its high sound pressure level.


The S92 horn is operated by the battery current or a control current coming from the steering wheel. This is passed through a relay to generate a voltage dip-free control current. The control current activates the electromagnet of the signal horn. This in turn attracts a metal core or armature, and above it, the steel diaphragm of the horn. The sound is produced by interrupting the power supply when the diaphragm is tightened and the armature and diaphragm return to the original position.


The HELLA S92 horn is available with a low (335 Hz) and a high (436 Hz) tone, each as a 12 V or 24 V variant, and produces a sound pressure level of approx. 112 dB(A) at 2 m distance.

Product Advantages

  • Ideal for all commercial vehicle types
  • Full sound and effective signaling for road safety
  • Black protective coating on membrane and housing
  • Tried-and-tested durability and service lifetime

Technical Data

Diameter 92 mm
Rated voltage

12V / 24V

Sound pressure level at 2 m distance 112 dB (A) ± 5 dB (A)
Frequency range

335 Hz (low tone)

435 Hz (high tone)

Power consumption

60 W (12 V)

72 W (24 V)

Current consumption

5.0 A max. (12 V)

3.0 A max. (24 V)

Operating temperature -40 °C to +85 °C
Protection class

IP 67

Lifetime 100,000 cycles
Housing material


Type approval


Program Overview

Variant Part number Packaging unit
24 V, 335 Hz, low tone 3AL 012 588-097 48
24 V, 435 Hz, high tone 3AL 012 588-087 48
12 V, 435 Hz, high tone 3AL 012 588-117 48