Shenghui Electronic

Product Overview: The High-Output Professional Audio Alert

Engineered for applications where clear, penetrating sound is non-negotiable, the 8.5x8.5x4.0mm SMD Magnetic Buzzer delivers exceptional performance. This robust passive buzzer produces a powerful 85dB alert at 4KHz, offering superior acoustic output and clarity ideal for industrial, commercial, and premium consumer electronics. Designed for seamless SMT (Surface Mount Technology) integration, tiny buzzer stands as a premier professional-grade audible indicator, providing reliable, long-range notifications in even moderately noisy settings, all within a compact and board-mountable footprint.

Product Advantages

Professional-Grade Sound Pressure Level

The optimized 4.0mm height and 8.5mm footprint create an ideal acoustic chamber, enabling a high 85dB sound output. This ensures alerts are clearly audible over ambient noise, making it suitable for industrial floors, workshops, and busy commercial environments.

Optimized for 3.6V Lithium-Powered Systems

The 3.6Vp-p operating voltage is perfectly matched for single-cell lithium-ion/polymer battery applications (nominal 3.7V), providing maximum efficiency and loudness without requiring additional voltage regulation or boosting circuitry.

Enhanced Durability and Thermal Performance

The larger internal volume allows for a more robust magnetic assembly and better heat dissipation. This design improves long-term reliability, stability under continuous operation, and resistance to mechanical stress and vibration.

High-Reliability SMT Design for Demanding Applications

The component is built to withstand standard reflow soldering profiles and is packaged for high-speed automated pick-and-place assembly. This ensures manufacturing yield and long-term solder joint reliability in end-products destined for challenging use cases.

Superior Value in the Mid-Power Segment

This model bridges the gap between standard miniature buzzers and larger, more expensive transducers. It delivers near-maximum audible impact for its size class, representing an outstanding balance of performance, reliability, and cost-effectiveness for volume production.

Product Applications

This high-output tiny buzzer buzzer is engineered for a wide range of electronic devices that require dependable, loud, and clear audible feedback:

• Industrial Automation & Control: Handheld terminals, barcode scanners, CNC machine panels, process control indicators, and safety equipment status alerts.

• Commercial & Point-of-Sale (POS): Cash registers, payment terminals, customer queuing systems, and time clock systems.

• Telecommunications & Networking: Enterprise VoIP phones, intercom systems, network server racks, and rack-mounted equipment for audible alarms.

• Automotive & Fleet Management: Telematics devices, driver logging systems, in-cab alert systems for commercial vehicles, and aftermarket security alarms.

• Power Tools & Professional Equipment: Battery-operated power tools, diagnostic instruments, and measurement devices for completion signals or error warnings.

Manufacturer Advantages: Shenghui Electronic

Nearly Three Decades of Electro-Acoustic Mastery

As a leading specialized tiny buzzer manufacturer founded in 1996, Shenghui Electronic brings deep, application-specific expertise to the design and production of reliable audible signaling components for global markets.

Integrated Manufacturing with Rigorous Process Control

We maintain vertical control over key production stages, from precision coil winding to final acoustic calibration. This enables stringent in-process quality assurance, ensuring every unit delivers consistent, specification-compliant performance batch after batch.

Certified and Audited Global Supply Partner

Our manufacturing operations are governed by a robust ISO9001:2015 certified quality management system. We are a vetted and trusted supplier to multinational OEMs, demonstrating our capability to meet the exacting standards of complex international supply chains.

End-to-End Engineering & Custom Solution Development

Our support extends beyond component supply. We provide comprehensive technical consultation and specialize in developing fully customized OEM/ODM tiny buzzer solutions, tailoring parameters like voltage, frequency, SPL, and environmental ratings to fit unique application challenges.

Scalable Production with True Cost Competitiveness

Leveraging our efficient, high-capacity manufacturing base, we offer highly competitive factory-direct pricing for volume orders. Our scalable production and proven logistics ensure a stable, on-time supply of components, from prototype validation to full-scale mass production.

What Our Customers Say

• Production Manager, Industrial Scanner Manufacturer:"We operate in loud warehouse environments. We needed a tiny buzzer that could cut through the noise without being huge. Shenghui's 8.5mm buzzer with 85dB output was the definitive solution. Its performance is consistent, and it has integrated perfectly into our automated SMT line for over two years."

• Head of Hardware, Fleet Telematics Company:"Reliability under harsh conditions (temperature, vibration) is paramount. Shenghui's components have proven themselves in our field units. Their 3.6V buzzer matches our power system perfectly, and the sound output is reliably loud for driver alerts. They are a strategic supplier for us."

• Lead Designer, Commercial POS Systems:"The sound quality and authority of this tiny buzzer added a professional feel to our product. Shenghui provided excellent support during our design phase, and the samples performed exactly as specified. Their ability to deliver on spec and on schedule for our production ramp was critical."

Frequently Asked Questions (FAQ)

Q1: The sound level is 85dB. How does this compare in practical use?

A: An 85dB sound pressure level is considered "loud" and is highly effective for alerting. It is approximately as loud as city traffic from inside a car or a noisy restaurant. This makes it suitable for environments with background noise where a standard 70-75dB buzzer might be missed. The tone is clear and attention-grabbing without being painfully shrill.

Q2: Can I drive this 3.6Vp-p buzzer with a standard 3.3V or 5V microcontroller PWM output?

A: This is a tiny buzzer and requires an external drive circuit, not a direct DC connection. You can use a standard NPN transistor or N-channel MOSFET switch. The microcontroller's GPIO pin (3.3V or 5V logic) controls the transistor. The collector/drain side of the transistor should be connected to your drive voltage source. For optimal loudness, this source should be 3.6V. A 3.3V source will work but at a slightly reduced volume; a 5V source can be used with a current-limiting resistor, but 3.6V is ideal. Never connect the buzzer directly to the microcontroller pin.

Q3: Do you offer this model with different termination or tape-and-reel packaging for our SMT line?

A: Yes, absolutely. As a direct tiny buzzer manufacturer, Shenghui Electronic offers flexible packaging options to suit your production needs. Standard products are available on tape and reel for automated assembly. We can also discuss different solder pad finishes or terminal plating if required. For specific packaging or termination requests, please provide your requirements to our sales team for a customized quotation.

Part Number：MES8585040-16R-3.6V-2730-F

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