Shenghui Electronic

The 12Vp-p piezo speaker is a high performance piezoelectric acoustic component engineered for robust and reliable sound projection. This 12V piezo speaker element is designed to deliver exceptional output, generating a minimum of 100 dBA of clear, penetrating sound from 30 centimeters away. Its wide operating voltage range (2~50Vp-p) and substantial static capacitance make it a versatile and powerful piezo element for a variety of alarm, signaling, and audio notification systems. Built with a durable MPPO housing, this waterproof piezo speaker component from Shenghui Electronic is the ideal foundation for creating loud, attention-commanding acoustic solutions in industrial and commercial environments.

Product Advantages

1. Exceptional Acoustic Output: Engineered to produce a powerful sound pressure level of ≥100 dBA at 30cm, this piezo buzzer speaker ensures that alerts and signals are clearly audible even in noisy environments or over distances.

2. Extremely Wide Operating Voltage Range: With a functional range from 2Vp-p to 50Vp-p, this piezo speaker element component offers unparalleled design flexibility. It can be integrated into low-voltage circuits or driven hard in high-voltage systems for maximum loudness, all from a single SKU.

3. Robust and Reliable Construction: Housed in a sturdy MPPO (Modified Polyphenylene Oxide) plastic case, the waterproof piezo speaker is resistant to impact, chemicals, and environmental stress, ensuring long-term durability and consistent performance.

4. Optimized Piezo Element for Efficiency: The design leverages a high-quality piezoelectric ceramic disc, offering a broad resonant frequency range (2200-4000 Hz) for tunable acoustic performance and high electro-acoustic conversion efficiency.

5. Designed for Thermal Stability: Rated for an operating temperature range of -30°C to +50°C, this piezo buzzer speaker maintains reliable performance in a wide array of environmental conditions, from freezing cold to industrial heat.

Product Applications

This high-output piezo speaker element is ideally suited for applications requiring loud, reliable, and durable audible signals:

• Industrial Alarm & Warning Systems: Machine fault alarms, process control sirens, and evacuation signals in factories and plants.

• Security & Safety Equipment: Burglar alarm panels, fire alarm sounders, and access control system alerts.

• Automotive & Transportation: Commercial vehicle backup alarms, agricultural equipment warnings, and marine signaling devices.

• Consumer Appliances: High-decibel timers for industrial appliances or public information systems.

Why Choose Our Piezo Speaker Element?

1. Decades of Electro-Acoustic Manufacturing Expertise: As a professional waterproof piezo speaker manufacturer since 1996, Shenghui Electronic possesses deep, specialized knowledge in piezo technology, ensuring components are designed for both performance and manufacturability.

2. Vertical Integration for Quality Assurance: We control core production processes, allowing for stringent in-process quality control. This ensures every piezo speaker element, like the SP45S002P-F, meets precise electrical and acoustic specifications before shipment.

3. ISO9001-Certified Production Standards: Our manufacturing operations are governed by an ISO9001-certified quality management system. This provides a framework for consistent quality, traceability, and continuous improvement, making us a reliable partner for global supply chains.

4. Full Engineering Support & Customization Capability: Beyond supplying standard parts, our technical team offers application support and specializes in OEM/ODM solutions. We can modify parameters or develop new piezo elements tailored to your specific voltage, sound, or form-factor requirements.

5. Competitive Pricing & Scalable, Reliable Supply: Leveraging our efficient manufacturing base in Changzhou, we offer highly competitive factory-direct pricing. Our scalable production capacity ensures a stable and on-time supply, from prototype samples to high-volume production orders.

What Our Customers Say

• Project Engineer, Industrial Control Panel Manufacturer: "We needed a piezo speaker element that was both loud and could handle voltage spikes in our 24V panels. The SP45S002P-F from Shenghui was perfect. The 100+ dB output is fantastic, and the wide voltage rating gives us a huge safety margin. Reliability has been 100%."

• Procurement Manager, Security Systems Integrator: "For our outdoor alarm sirens, we need components that won't fail. We've standardized on this Shenghui waterproof piezo speaker for multiple product lines. The quality is consistent, the sound is powerful, and they have never missed a delivery deadline, which is critical for our projects."

• R&D Lead, Automotive Accessory Company: "The combination of high output, robust housing, and wide temperature tolerance made this Shenghui component the standout choice for our new vehicle alarm. The samples performed exactly as specified, and the datasheet was clear and comprehensive."

FAQ

Q1: This is a 12Vp-p rated product. Can I safely drive it with a 24V or 48V signal?

A: Yes, absolutely. One of the key advantages of this piezo buzzer speaker model is its extremely wide operating voltage range of 2~50Vp-p. You can drive it with a 24V or 48Vp-p square wave signal. Driving it at a higher voltage (within the 50Vp-p maximum) will typically result in a louder sound output. Always ensure your drive circuit is designed to provide the correct voltage and current.

Q2: What is the recommended drive circuit for this passive piezo speaker?

A: This is a Passive Piezoelectric Speaker and requires an external drive circuit. A common and effective method is to use it in a self-drive oscillator circuit (like a 555 timer configuration) or to drive it with a square wave from a microcontroller through a suitable transistor switch (NPN or MOSFET). The drive signal should be a square wave with a frequency within its resonant range (2200-4000 Hz) for optimal efficiency and volume.

Q3: Is the sound output of 100 dBA guaranteed, and at what frequency?

A: The specification sheet states a minimum sound output of 100 dBA at a distance of 30cm. The exact output can vary slightly within the resonant frequency band (2200-4000 Hz). For the loudest possible output, it is recommended to tune your drive circuit to the specific resonant frequency of the unit, which typically falls near the center of this range. Shenghui Electronic can provide more detailed characterization data for volume optimization upon request.

Part Number: SP45S002P-F

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