SMT-915

Alarms, Buzzers, And Sirens Overview

The SMT-915 is a surface-mount magnetic audio transducer manufactured by PUI Audio, Inc. It operates at a nominal voltage of 1.5V and features an electromagnetic design suitable for board mounting applications. The component utilizes a gullwing lead termination style and is housed in a compact square package measuring 8.5 mm x 8.5 mm with a depth of 4 mm. It delivers a sound pressure level of 90 dBA at a frequency of 3 kHz, with an impedance of 16 ohms. The device supports a wide operating temperature range from -40°C to +105°C.

Alarms, Buzzers, And Sirens Feature Summary

• Electromagnetic transducer design for external driving
• Surface mount construction with gullwing leads
• High sound pressure level output of 90 dBA
• Wide operational temperature capability

Alarms, Buzzers, And Sirens Applications

• Board-mounted audio indicators
• Magnetic buzzer circuits
• Alarm signal generation
• Siren applications

Alarms, Buzzers, And Sirens Procurement Notes

Verify the specific datasheet version for the SMT-915 to confirm RoHS compliance status, as some sources indicate potential non-compliance or varying regulatory statuses. Ensure that the 1.5V nominal voltage rating aligns with the target circuit's power supply constraints. Confirm that the 16-ohm impedance matches the driver stage requirements to prevent excessive current draw or insufficient volume. Validate the 8.5mm x 8.5mm footprint against the PCB layout to ensure proper gullwing lead placement and soldering compatibility.

Alarms, Buzzers, And Sirens Selection Notes

Select the SMT-915 when a low-voltage (1.5V) surface-mount solution is required for audible signaling. Its high efficiency (90 dBA) makes it suitable for environments where clear audio alerts are necessary despite limited power availability. The electromagnetic type allows for direct driving without complex oscillator circuits if the impedance is matched. Consider the 105°C maximum temperature rating for applications involving heat-generating components nearby. The square form factor aids in dense PCB layouts compared to cylindrical alternatives.

Alarms, Buzzers, And Sirens Part Context

The SMT-915 belongs to PUI Audio’s lineup of surface-mount magnetic transducers, designed for integration into compact electronic devices requiring audible feedback. Unlike piezoelectric variants, this electromagnetic model offers distinct acoustic characteristics suited for specific alert tones. It complements other SMT series components like the SMT-916 and SMT-9303DT, providing engineers with standardized mounting options for various voltage and sound pressure requirements in consumer electronics and industrial control panels.

Alarms, Buzzers, And Sirens Replacement Considerations

Publicly confirmed substitute part numbers for the SMT-915 are not available in the provided documentation. Engineers should consult PUI Audio directly for cross-reference data or verify equivalent specifications from other manufacturers such as Murata or Nidec, ensuring matching voltage, impedance, and acoustic output levels.