Professional Technical Analysis of Electronic and Mechanical Horns ——Based on TEMB Automotive Electric Product Analysis

In modern automotive acoustic warning systems, electronic and mechanical horns represent two distinct technological paths. As one of China's earliest specialized automotive horn manufacturers, Qufu TEMB Automotive Electric Co., Ltd. (TEMB) has accumulated over 40 years of experience in the R&D, production, and adaptation of both types of products. The following provides a professional comparative analysis based on TEMB's technical documentation and product manuals.

I. Mechanical Horns (Contact/ Mechanical Horn)

Representative Products: DL133-80 Snail Horns, DL125 -80 Disc Horns

1.Working Principle

Based on electromagnetic induction and mechanical vibration:

When energized, current passes through an electromagnetic coil to generate a magnetic field, attracting an armature that drives a diaphragm to produce sound.

Mechanical contacts make and break during armature movement, creating high-frequency vibrations (typically ≥200 Hz).

Sound is amplified through a snail-shaped or disc-shaped resonance chamber.

2. TEMB Technical Features

Low-Current Design: Operating current optimized to 3–6A, reducing circuit load (DL133 series).

Waterproof Structure: Snail-shaped cover uses a double-layer waterproof plate to minimize failure risks from water ingress.

High Compatibility: Supports 12V/24V voltages, compatible with mainstream domestic and international vehicle models (e.g., Volkswagen, Toyota, Hyundai).

Stable Sound Pressure: Fundamental frequency accuracy controlled within ±20 Hz (e.g., 410±20 Hz low tone / 510±20 Hz high tone).

3. Typical Performance Parameters (Using DL133 as an Example)

Sound Pressure Level: 105–118 dB(A)

Fundamental Frequency Range: 350–510 Hz

Operating Voltage: 12V/24V DC

4. Application Scenarios

Primarily used in economy passenger vehicles, commercial vehicles, and the aftermarket (e.g., DL133-03 compatible with Hyundai/Kia full series).

II. Electronic Horns (Electronic Contactless Horn)

Representative Products: DL131DZ Series, DL120DZ Series

1.Working Principle

Utilizes microcomputer control and contactless switching technology:

An MCU continuously monitors the diaphragm’s resonant frequency and drives the MOSFET circuit via PWM.

Automatic Frequency Tracking Technology: The microcomputer detects and tracks the resonant frequency of the sounding plate (as per company documentation), ensuring stable sound pressure output under varying environmental conditions.

Eliminates mechanical contacts entirely, avoiding arc oxidation.

2. TEMB Technical Advantages

Contactless Design: Lifecycle >400,000 cycles (3 times longer than mechanical horns).

Intelligent Protection: Supports overvoltage and reverse connection protection to prevent burnout from high voltage.

Waterproof Sealing: Electronic module potted with epoxy resin; snail cover features a labyrinth waterproof structure.

Environmental Adaptability: Automatic frequency tracking technology ensures stable and efficient sound pressure output in complex environments such as high altitudes and low temperatures.

3. Typical Performance Parameters (Using DL131DZ-80 as an Example)

Lifecycle: >400,000 cycles

Sound Pressure Level: 105–118 dB(A)

Fundamental Frequency Accuracy: 400±20 Hz / 500±20 Hz

Operating Current: 6A (12V) / 3A (24V)

4. Application Scenarios

High-end passenger vehicles, electric vehicles (compatible with AVAS systems), and export models to Europe and America (E-Mark certified).

III. TEMB Core Technology Comparison

IV. TEMB Production Capacity and Customization Capabilities

Production Capacity: 5 automated production lines with an annual capacity of 10 million units.

Custom Development: Supports OEM/aftermarket customization, offering 12V/24V voltages and various fundamental frequency/sound pressure options.

Technology Reserve: Possesses automatic frequency tracking and waterproof design technologies to meet electrification and intelligent demands.

Conclusion

As an industry leader, TEMB enhances reliability in mechanical horns through low-current design and structural optimization, while achieving technological breakthroughs in electronic horns with contactless technology and automatic frequency tracking. Both product lines develop in parallel, covering full-scenario needs from economy vehicles to high-end electric vehicles, contributing to global automotive acoustic safety upgrades.

Technical Support: TEMB provides full-range product parameter manuals and test reports (for details, contact marketing@tembdq.com).