Shenghui Electronic

Product Overview

The 3Vp-p 4KHz 70dB passive piezo buzzer – the fundamental component for adding clear, reliable audible feedback to a wide array of electronic devices. This industry-standard passive piezo buzzer is engineered for simplicity and effectiveness, producing a distinct 4KHz tone at a moderate 70dB sound level, perfect for indoor and personal electronics. As a versatile 3v piezo buzzer, it operates at a low drive voltage, making it highly compatible with battery-powered and microcontroller-based designs. This makes it the go-to choice for designers seeking a cost-effective, high-performance passive piezo buzzer for consumer, commercial, and industrial applications where dependable notification is key.

Product Advantages

Low-Voltage, Energy-Efficient Operation: Designed as a 3v piezo buzzer, it operates efficiently at just 3V peak-to-peak. This low drive voltage minimizes power consumption, extending battery life in portable devices and making it perfectly suited for integration with 3.3V or 5V logic systems, a core advantage of this passive piezo buzzer.

Clear, Pleasant 4KHz Audible Tone: This passive piezo buzzer generates a clear 4KHz tone at approximately 70dB. This frequency is easily audible yet non-intrusive, ideal for user interface feedback, timers, and reminders in consumer electronics, avoiding the harshness associated with some magnetic buzzers.

Simple Integration with External Drive Flexibility: Being a passive piezo buzzer, it requires an external oscillator circuit (typically a simple transistor switch driven by a microcontroller pin). This provides designers with complete control over the sound—enabling patterns, melodies, and precise on/off timing that an active buzzer cannot offer, highlighting the versatility of this 3v piezo buzzer.

Compact, Reliable, and Cost-Effective Design: With a simple piezoelectric element construction, this passive piezo buzzer offers excellent reliability and a long operational lifespan. Its compact form factor and economical price point make it an outstanding value, providing essential audible functionality without compromising on quality or inflating the BOM cost.

Wide Availability and Design Maturity: As a classic 3v piezo buzzer specification, this product benefits from a mature and proven design. Its widespread use means extensive application notes, proven driver circuits, and reliable availability, reducing design risk and speeding up time-to-market for your product.

Product Applications

This reliable and efficient passive piezo buzzer is a perfect fit for a multitude of electronic applications:

• Consumer Electronics: Microwave oven timers, coffee makers, digital scales, rice cookers, and home appliance user interfaces.

• Office & Commercial Equipment: Printers, copiers, POS systems, time clocks, and security keypads.

• IoT & Smart Home Devices: Smart sensors (door/window, smoke, water leak), wearable device alerts, and smart plug notifications.

• Toys & Educational Kits: Electronic learning toys, DIY robotics kits, and hobbyist projects requiring simple sound generation.

• Industrial Control & Instrumentation: Panel mount indicators, handheld test equipment, and control system status alerts.

Manufacturer Advantages

High-Volume Specialization in Standard Components: As a leading manufacturer, Shenghui Electronic excels in the high-volume production of reliable standard components like this 3v piezo buzzer. Our optimized manufacturing processes ensure consistent quality and availability for the most common passive piezo buzzer specifications demanded by the global market.

Rigorous Quality Control for Mass Production: Our ISO9001-certified factory implements stringent quality control at every production stage. Each batch of this passive piezo buzzer undergoes electrical and acoustic testing, guaranteeing that every unit meets the specified 3Vp-p, 4KHz, and 70dB performance parameters reliably.

Technical Support for Optimal Integration: We provide comprehensive datasheets and application guidance to help you design the most effective and reliable drive circuit for this 3v piezo buzzer. Our engineering team can assist in selecting the right external components to maximize the performance and longevity of this passive piezo buzzer in your application.

Flexible Customization Options: While this is a standard product, Shenghui Electronic offers customization on parameters like termination style (wire leads, SMD), connector types, and slight frequency adjustments. We can tailor this fundamental passive piezo buzzer to better fit your specific assembly or acoustic requirements.

Competitive Factory-Direct Pricing & Reliable Supply Chain: Leveraging our scale and vertical integration, we offer highly competitive factory-direct pricing for this essential component. We maintain robust inventory and production planning to ensure a stable, long-term supply of this critical 3v piezo buzzer for your production lines.

What Our Customers Say

• Design Engineer, Small Appliance Company: "We needed a reliable, low-cost beeper for our new line of kitchen timers. This 3v piezo buzzer from Shenghui was perfect. The sound is clear, it's easy to drive from our MCU, and the quality has been flawless across millions of units."

• Procurement Manager, Toy Manufacturer: "Consistency and cost are everything for us. Shenghui's passive piezo buzzer delivers on both. The 70dB output is just right for our products, and we've never had a batch failure. Their supply reliability keeps our production smooth."

• Founder, IoT Startup: "For our smart sensor, we needed a buzzer that was tiny, low-power, and allowed us to program custom beep patterns. This passive piezo buzzer was the ideal solution. The 3v piezo buzzer spec let us run it directly from a coin cell, and Shenghui's datasheet made driver design simple."

FAQ

Q1: What is the difference between a "Passive" and an "Active" buzzer?

A: An Active Buzzer has a built-in oscillation circuit—you simply apply a DC voltage, and it sounds continuously. A Passive Buzzer, like this model, does not have an internal oscillator. It requires an external drive circuit (typically a square wave at its resonant frequency, like 4KHz) to produce sound. This makes the passive piezo buzzer more flexible for creating beep patterns and melodies but requires a more complex driver circuit than an active type.

Q2: How do I drive this 3Vp-p passive buzzer with a 5V microcontroller?

A: You can safely drive this 3v piezo buzzer from a 5V system. The most common method is to use an NPN transistor (e.g., 2N3904) or an N-channel MOSFET as a low-side switch. The buzzer is connected between your 5V rail and the transistor's collector/drain. The microcontroller GPIO pin (3.3V or 5V) controls the transistor's base/gate. A small resistor (e.g., 1kΩ) is placed in series with the GPIO pin. The transistor switches the 5V to the buzzer, but the buzzer's own impedance limits the current, making it safe for this passive piezo buzzer. Always include a flyback diode across the buzzer to protect the transistor.

Q3: Can I change the sound frequency or volume of this buzzer?

A: Frequency: Yes, as a passive piezo buzzer, the sound frequency is determined by the frequency of the driving square wave you provide. While it is mechanically tuned for optimal efficiency at 4KHz, you can drive it with other frequencies (e.g., 2KHz to 5KHz) to create different tones, though loudness may vary.

Volume: The volume (loudness) of this 3v piezo buzzer is primarily determined by the drive voltage (higher voltage = louder, up to its maximum rating) and the drive waveform. Using a full square wave at 3Vp-p will produce the rated 70dB.

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