Electromechanical horn B133

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 B133 horn is particularly suitable for commercial vehicles. It generates maximum attention with its high sound pressure level.

 

The B133 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 B133 horn is available with a low tone (375 Hz), a high tone (500 Hz) or with both tones. It produces a sound pressure level of approx. 118 dB(A) at 2 m distance and it is splash-proof.

Product Advantages

  • Traffic blaster, produces a piercing strong tone
  • Robust housing in first-class design with distinctive grill
  • Ideal for buses, commercial vehicles, emergency vehicles, off-road and passenger cars

Technical Data

Diameter 123 mm
Operating voltage

12 / 24 V

Current consumption 6.5 A max. (12 V)
3.5 A max. (24 V)
Power consumption

78 W (12 V)
84 W (24 V)

Operating temperature -40 °C to +90 °C
Protection class

IP X9K, IP X7

Type approval ECE R28, (E1) 000414
Housing material

CRCS class EDD

Frequency range

375 Hz (high tone)
500 Hz (low tone)

Sound pressure level 118 dB (A)
Lifetime 50,000 cycles

Program Overview

Variant Part number Packaging unit
12 V, 375 / 500 Hz, strong tone, with Teflon pellet,
6,3 mm splash-proof flat connector with rubber grommet
3AG 003 399-081 1 set
24 V, 375 / 500 Hz, strong tone, with Teflon pellet,
6,3 mm splash-proof flat connector with rubber grommet
3AG 003 399-101 1 set
12 V, 375 Hz, strong tone, with Teflon pellet,
6,3 mm splash-proof flat connector with rubber grommet
3AF 003 399-041 1
12 V, 500 Hz, strong tone, with Teflon pellet,
6,3 mm splash-proof flat connector with rubber grommet
3AF 003 399-051 1
24 V, 375 Hz, strong tone, with Teflon pellet,
6,3 mm splash-proof flat connector with rubber grommet
3AF 003 399-061 1
24 V, 500 Hz, strong tone, with Teflon pellet,
6,3 mm splash-proof flat connector with rubber grommet
3AF 003 399-071 1
24 V, 375 Hz, strong tone, with Teflon pellet,
6,3 mm splash-proof flat connector with rubber grommet
3AF 003 399-327 24
24 V, 500 Hz, strong tone, with Teflon pellet,
6,3 mm splash-proof flat connector with rubber grommet
3AF 003 399-337 24
24 V, 375 Hz, strong tone, splash-proof DEUTSCH connector 3AF 003 399-347 24
24 V, 500 Hz, strong tone, splash-proof DEUTSCH connector 3AF 003 399-357 24

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