Aviation Electronic Horn DL38C

DL38C Military Aviation Horn: High-Intensity Audible Alert for Critical Systems

The YM DL38C Military Aviation Horn is an electromagnetic audible alert device engineered for demanding aerospace and industrial environments. Designed to provide a loud, clear, and reliable audible signal in aircraft, drones, and ground support equipment, it serves as a critical component for safety warnings, system status alerts, and operational cues. Built with military-grade durability, the DL38C ensures consistent performance under conditions of extreme vibration, temperature variations, and atmospheric pressure changes, making it the trusted choice for mission-critical auditory signaling.

 

Technical Specifications

The DL38C's specifications are tailored to deliver reliable and immediate audible alerts in the challenging acoustic and physical environments of aviation and heavy industry.

Electrical & Auditory Performance

• Coil Power Consumption: Efficient operation at (0.3~0.43)W, suitable for integration into standard 28V DC Aircraft Electrical Systems without excessive power draw.
• Contact Load & Operational Life: Rated for a 1A, 28V DC resistive load, with a high endurance lifecycle of 1x10⁷ actuations, ensuring long service life.
• Fast Auditory Response: Features a rapid action time of ≤4ms and release time of ≤4ms, providing near-instantaneous sound generation upon command, comparable to the response speed of a Flash Relay for visual signals.
• Control Signal Compatibility: Designed to activate reliably with a low-level control pulse of (10～50) ms width, making it compatible with standard digital control outputs.

Environmental & Physical Durability

• High Dielectric Strength: Withstands 500V_r.m.s. (50Hz) at sea level and 250V_r.m.s. under low-pressure (high-altitude) conditions, ensuring electrical safety and insulation integrity.
• Robust Insulation Resistance: Maintains >500MΩ initially and >50MΩ after extended operation, preventing signal leakage and ensuring reliable switching.
• Sealed Construction: Built with a hermetic seal exhibiting a maximum leakage rate of ≤1x10^-3 Pa·cm³/s, protecting the internal electromagnetic coil and sound-generating mechanism from moisture, dust, and contaminants.
• Lightweight & Compact: Weighs less than 3 grams, offering a minimal weight penalty for airborne applications while housed in a rugged casing.

Product Features & Core Advantages

Utilizing YM's core competency in electromagnetic actuation, proven in products like the Polarized Relay and Latching Relay, the DL38C horn delivers distinct advantages in reliability and performance.

Engineered for Clear & Reliable Auditory Signaling

• High-Intensity, Clear Sound Output: Designed to produce an attention-commanding audible tone that can cut through ambient noise in hangars, flight decks, and industrial settings.
• Exceptional Vibration & Shock Resistance: Constructed with the same ruggedness as our Military Metal Relay series, the internal components are secured to prevent failure or performance degradation in high-vibration environments such as operating engines or moving vehicles.
• Long-Term Reliability & Consistency: The 10-million-operation lifecycle and stable contact resistance (≤50mΩ initial) ensure the horn will sound reliably every time, year after year, reducing maintenance concerns.
• Broad Environmental Tolerance: Operates consistently across a wide temperature range and is sealed against humidity and particulate ingress, making it suitable for both internal aircraft use and external ground support equipment.

How to Integrate the DL38C Horn: A Step-by-Step Guide

1. System Requirements Definition: Determine the required sound pressure level (dB), tone, and duty cycle for your application. Ensure the DL38C's acoustic profile meets the alert or warning needs in the intended environment.
2. Mechanical Mounting: Securely mount the horn in a location where sound propagation is optimal and where it is protected from direct physical impact. Consider vibration-dampening mounts if installed on highly vibrating surfaces.
3. Electrical Circuit Design: Integrate the horn into the control circuit. Its low power coil can be driven directly by a PCB Signal Relay or a transistor output from a microcontroller. Include appropriate reverse-voltage protection if needed.
4. Acoustic Testing & Positioning: After installation, test the horn's audibility from key operator positions. Adjust mounting location or orientation if necessary to ensure the warning is clearly heard over background noise.
5. System Integration Test: Integrate the horn into the full system alert logic. Test all trigger conditions (e.g., low oil pressure, landing gear status, safety zone breach) to confirm reliable operation within the complete control loop.

Application Scenarios

The DL38C is designed for reliable audible signaling across a spectrum of aviation, transportation, and industrial applications.

• Aircraft & Helicopter Warning Systems: Used for cockpit warnings (e.g., stall, landing gear), cabin crew alerts, or external APU (Auxiliary Power Unit) start-up warnings.
• Unmanned Aerial Vehicle (UAV) Ground Operations: Provides audible alerts for launch sequence status, system faults, or safety perimeter breaches during drone maintenance and pre-flight checks.
• Ground Support Equipment (GSE): Installed on aircraft tow tractors, fuel trucks, and cargo loaders to signal reversing operations, system readiness, or malfunctions.
• Industrial Machinery & Safety Systems: Provides essential audible warnings on automated production lines, test equipment, or within safety interlock systems, functioning as an auditory counterpart to the visual status provided by Solid State Relays or Industrial Power Relays.

Value for Procurement Teams & System Integrators

Choosing the DL38C provides tangible benefits for safety, operations, and lifecycle costs.

• Enhance Operational Safety & Compliance: A reliable, high-quality audible alarm is a critical component in meeting safety regulations and preventing accidents in both aviation and industrial settings.
• Reduce Maintenance & Replacement Costs: The extended mechanical lifespan and durable construction minimize the frequency of replacements and associated downtime, lowering the total cost of ownership.
• Improve System Communication: Provides an unambiguous, immediate auditory cue to operators, improving response times and reducing the likelihood of missed visual warnings alone.
• Source from an Electromagnetic Specialist: Procure this critical alert component from YM, a manufacturer with deep expertise in reliable electromagnetic devices, from Automotive Relays to specialized New Energy Relay applications, ensuring quality and performance consistency.

Certifications, Compliance & Customization

Aligned with Industry Requirements

YM designs components with application requirements in mind. While specific audible signaling devices may have different certification paths than relays, our manufacturing quality system ensures traceability and consistency. We provide support to customers needing documentation for their system-level qualifications.

Customization Options (OEM/ODM)

Standard horns may not suit every application's acoustic or physical needs. YM offers tailored solutions through our OEM/ODM services:

• Acoustic Customization: Modification of sound frequency (pitch), sound pressure level (loudness), tone pattern (continuous, beep, warble), and resonance chamber design.
• Voltage & Electrical Variations: Coils wound for different operating voltages (e.g., 12V DC, 24V DC, 115V AC) or with built-in drivers or oscillators for specific input signals.
• Mechanical & Environmental Adaptation: Custom housing shapes, colors, IP-rated ingress protection levels, connector types, or mounting brackets.
• Integrated Solutions: Combining the horn with other alert functions, such as a visual strobe, or integrating it into a custom assembly with control circuitry.

Precision Manufacturing & Acoustic Validation

Each DL38C horn is produced through a controlled process that emphasizes both electromagnetic reliability and acoustic performance.

1. Precision Coil Winding: The electromagnetic coil is wound with precision automation to ensure consistent resistance and magnetic force, a process refined through the production of millions of PCB Board Relays.
2. Acoustic Diaphragm Assembly: The sound-generating diaphragm and associated mechanical components are assembled in a controlled environment to ensure consistent vibration characteristics and tone quality.
3. Hermetic Sealing Process: The assembly undergoes a sealing process, followed by sample-based leak testing to validate the environmental seal's integrity for protected operation.
4. Functional & Endurance Testing: 100% of units are tested for actuation time, sound output, and electrical parameters. Batch samples undergo extended lifecycle testing to validate the 10-million-operation durability claim.
5. Final Acoustic & Performance Verification: A final check verifies the audible output meets specified criteria. Performance data is recorded to ensure each unit functions as intended before shipment.