SMT-0821-T-R

Alarms, Buzzers, And Sirens Overview

The SMT-0821-T-R is an electromagnetic transducer manufactured by PUI Audio, designed for surface-mount technology (SMT) board mounting. It features a square shape with gullwing lead termination and measures 8.5 mm in length, 8.5 mm in width, and 4 mm in depth. The device operates within a temperature range of -30°C to +80°C. Key electrical specifications include a self-resonant frequency of 2.1 kHz, an impedance of 16 Ohms, and a sound pressure level of 87 dBA. It has a voltage rating of 3.6 V and a current rating of 90 mA.

Alarms, Buzzers, And Sirens Feature Summary

• Electromagnetic conversion mechanism for audio signal output
• Surface-mount design with gullwing leads for automated PCB assembly
• Square form factor optimized for compact electronic enclosures

Alarms, Buzzers, And Sirens Applications

• Consumer electronics requiring compact audio indicators
• Medical devices needing small form-factor acoustic signals
• Industrial control panels for status alerts

Alarms, Buzzers, And Sirens Procurement Notes

Verify the specific RoHS compliance status through official manufacturer documentation or certified datasheets before integration. Confirm that the gullwing lead pitch and footprint dimensions match the target PCB layout exactly. Ensure the operating environment remains within the specified -30°C to +80°C thermal limits to maintain performance integrity and longevity.

Alarms, Buzzers, And Sirens Selection Notes

Select this component when a low-profile electromagnetic solution is required for space-constrained designs. The 16 Ohm impedance and 90 mA current draw must align with the driving circuit capabilities. Consider the 87 dBA sound pressure level against application noise requirements. Verify compatibility with reflow soldering profiles suitable for gullwing lead packages.

Alarms, Buzzers, And Sirens Part Context

This part belongs to the SMT-08 series of surface-mount transducers from PUI Audio. The series offers various impedance and frequency options within a consistent 8.5 mm x 8.5 mm footprint. It serves as a standardized acoustic output component for modern miniaturized electronic systems requiring reliable, board-mounted audio signaling.

Alarms, Buzzers, And Sirens Replacement Considerations

Cross-reference with other SMT-08 series variants such as SMT-0825-T-R or SMT-0820-S-R if different impedance or sensitivity levels are needed. Ensure any substitute maintains the same gullwing lead configuration and physical dimensions for direct mechanical compatibility.