Four New Lead-Free Audio Buzzers, RoHS Compliant Parts

PUI Audio continues its commitment to innovation and sustainability with the introduction of four new lead-free audio buzzers. These components provide high-performance acoustic signaling while complying with the Restriction of Hazardous Substances (RoHS) directive, ensuring environmentally friendly solutions without compromising output.

Why Lead-Free Matters

Lead-free components have become a necessity in modern electronics. Regulatory restrictions, particularly the RoHS directive, mandate the reduction of hazardous substances, making lead-free buzzers an essential choice for manufacturers in medical, industrial, and consumer applications. The new PUI Audio lead-free buzzers are designed to meet these strict environmental standards while maintaining high reliability, longevity, and efficiency.

New Lead-Free Buzzer Lineup

These new benders offer superior performance in applications that require precise audio signaling with reduced environmental impact.

Benders vs. Indicators vs. Transducers: What’s the Difference?

Understanding the distinction between these components is crucial for selecting the right buzzer for your application:

• Indicators: Self-contained buzzers that generate sound with an internal oscillator. Ideal for applications requiring a simple alert or tone without additional circuitry.
• Transducers: Require an external drive circuit to generate sound. Offer flexibility in tone and sound profile customization.
• Benders: Utilize piezoelectric properties to generate sound through mechanical flexing, offering high efficiency, low power consumption, and long life spans.

Driving Lead-Free Buzzers Efficiently

Driving piezoelectric transducers and benders requires specific considerations to maximize output and efficiency. The optimal drive method involves applying an AC voltage to create flexing movement in the piezo element. The resulting sound output depends on voltage amplitude, frequency, and circuit design.

For best results:

• Use a 50% duty cycle, 0V-VPK square wave for maximum sound pressure level (SPL).
• Consider half-rectified sine waves for softer tones.
• Employ a low-impedance drive circuit for peak efficiency.
• Implement resistors or diodes for charge dissipation and protection.

Predicting Sound Output (SPL Calculation)

SPL output can be estimated using the following formula:

SPLx = SPL0 + 20 * log10(Vx / V0)

Where:

• SPLx = Desired SPL at voltage Vx
• SPL0 = SPL at rated voltage V0

For example, if a transducer produces 90 dBA at 10Vpp, increasing the input voltage to 20Vpp will result in an estimated output of 96 dBA.

Application Scenarios

PUI Audio’s new lead-free buzzers are ideal for:

• Medical Devices – Compliance with RoHS ensures safe usage in patient monitoring and diagnostic equipment.
• Industrial Machinery – Reliable, long-lasting sound alerts for operational feedback and warnings.
• Security Systems – Efficient and durable signaling for alarms and notifications.
• Consumer Electronics – Lightweight and low-power components for modern smart devices.

PUI Audio’s four new lead-free buzzers reinforce our dedication to sustainability, compliance, and high-performance acoustic solutions. These RoHS-compliant components provide precise, reliable, and efficient sound signaling for a wide range of applications. Whether in industrial equipment, medical devices, or consumer electronics, our latest buzzers ensure compliance without compromise.

For more details, visit:


• PUI Audio Indicators
• PUI Audio Transducers
• PUI Audio Benders