SMT-0540-T-9-R

Alarms, Buzzers, And Sirens Overview

The SMT-0540-T-9-R is an externally driven electromechanical buzzer transducer manufactured by PUI Audio, Inc. It operates within a voltage range of 2 to 5 VDC and draws 100 mA at the rated voltage of 3 VDC. The device produces an acoustic output of 80 dBA at 3 VDC with a resonant frequency of 4 kHz. Designed for surface mount technology (SMD), it features a compact 5x5 mm footprint and utilizes liquid crystal polymer materials for its construction.

Alarms, Buzzers, And Sirens Feature Summary

• Externally driven electromechanical design requiring external drive circuitry
• Surface mount package optimized for automated PCB assembly
• Liquid crystal polymer construction for durability

Alarms, Buzzers, And Sirens Applications

• Electronic alarm systems
• Audible status indicators in consumer electronics
• Industrial control panel signaling

Alarms, Buzzers, And Sirens Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to ensure compatibility with required voltage and mounting specifications. Confirm RoHS compliance status directly with the supplier documentation prior to procurement. Ensure that the selected component matches the exact electrical ratings required for the target application circuit.

Alarms, Buzzers, And Sirens Selection Notes

Select this component when a low-profile, surface-mount audible indicator is required for space-constrained designs. The 80 dBA output level provides clear audibility for general status notifications. Verify that the driving circuit can supply the necessary 100 mA current draw at the operating voltage to ensure reliable actuation without signal distortion.

Alarms, Buzzers, And Sirens Part Context

This part belongs to PUI Audio's line of externally driven piezo and electromagnetic transducers. Unlike self-exciting buzzers, these components require an external oscillator or microcontroller pin to generate the driving signal. They are commonly used in applications where volume control or frequency modulation is necessary via the driving source.

Alarms, Buzzers, And Sirens Replacement Considerations

Direct replacements must match the 5x5 mm SMD footprint, 4 kHz frequency, and 80 dBA acoustic output. Verify that substitute components support the same 2-5 VDC operating range and 100 mA current requirement. Check for identical mounting orientation and terminal configuration to ensure board compatibility.