AT-1438-TWT-R

Overview

The AT-1438-TWT-R is an externally driven piezo transducer manufactured by PUI Audio, Inc. It features a round shape with a diameter of 13.8 mm and a depth of 6.8 mm. The component operates at a resonant frequency of 3.8 kHz with a maximum operating current of 1 mA. It delivers a sound pressure level of 80 dBA and supports a maximum supply voltage of 20 V. Designed for through-hole mounting via PC pins, it functions as an audible alert device suitable for various electronic applications.

Feature Summary

• Externally driven piezo design for flexible signal integration
• Low power consumption with 1 mA operating current
• Through-hole PC pin mounting for standard PCB assembly

Applications

• Audible alerts and notifications in consumer electronics
• Security and fire alarm systems
• Industrial control panel indicators

Procurement Notes

Verify the specific datasheet version from PUI Audio or authorized distributors to confirm mechanical dimensions and electrical ratings. Ensure the selected variant matches the required resonant frequency and mounting style for your PCB layout. Cross-reference part numbers carefully as suffixes may indicate different packaging or minor specification changes.

Selection Notes

Select this component when a low-profile, low-power audible indicator is required. The external drive capability allows for custom waveform generation rather than fixed tone output. Consider the 80 dBA SPL rating against enclosure acoustic requirements. Verify that the 20 V maximum supply voltage aligns with the driving circuit's output capabilities.

Part Context

This transducer belongs to PUI Audio's line of piezo buzzers and indicators. It is distinct from electromagnetic speakers and self-excited buzzers. The product series focuses on providing reliable audio signaling solutions for medical, industrial, and consumer markets with compact form factors.

Replacement Considerations

Direct substitutes include other externally driven piezo transducers with similar 3.8 kHz resonance and 13.8 mm diameter. Check compatibility with existing PCB footprints and driving circuit voltage levels before substitution.