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2024-08-27
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.
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.
The electromechanical horn B133.
Technical drawing of the electromechanical horn B133.
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) |
| 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) |
| 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 |