PT-1109S

Overview

The PT-1109S is an externally driven piezoelectric buzzer manufactured by Soberton Inc. It operates at a rated voltage of 5V with a current draw of 4.5mA. The device produces a sound pressure level of 73dB at 5V, measured at a distance of 10cm. Its resonant frequency is 4100Hz. The component utilizes surface-mount technology (SMD) termination and lacks a built-in drive circuit, requiring external driver electronics. It is designed for applications such as alarms, buzzers, and sirens.

Feature Summary

• Externally driven piezoelectric transducer design
• Surface-mount device (SMD) termination for automated assembly
• High acoustic output of 73dB at rated voltage
• Compact form factor suitable for space-constrained electronic enclosures

Applications

• Electronic alarm systems
• Audible notification buzzers
• Siren devices
• Panel accessories requiring acoustic signaling

Procurement Notes

Verify the specific package variant and tolerance requirements against the official Soberton datasheet before ordering. Confirm that the application circuit provides the necessary external drive signal, as this unit does not contain internal oscillator circuitry. Ensure the operating voltage range aligns with the specified 5V rating to maintain optimal performance and longevity. Check for any environmental constraints regarding washability, as this model is non-washable.

Selection Notes

Select the PT-1109S when a compact, high-volume SMD piezo element is required for audible alerts. It is appropriate for designs where the driving logic or microcontroller can supply the necessary peak-to-peak signal directly. Consider its 73dB output level relative to enclosure attenuation. This part is distinct from self-exciting buzzers and requires careful interface design to ensure correct frequency generation at 4100Hz.

Part Context

This component belongs to Soberton Inc.'s line of piezoelectric buzzers and horns. It is categorized under panel accessories and alarm devices. The manufacturer specializes in electro-acoustic components for mobile and consumer electronics. The PT series typically denotes piezoelectric elements with specific dimensional and acoustic characteristics tailored for surface-mount integration.

Replacement Considerations

Direct substitutes must match the 5V rating, 73dB SPL, 4100Hz frequency, and SMD footprint. Verify pinout compatibility if alternative packages exist. Ensure the replacement also lacks a built-in driver circuit unless the system architecture is modified accordingly.