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Though extremely small, the SMT-0440 series transducers are constructed almost exactly the same as electro-mechanical transducers three times their size. What this means for users is that PUI Audio is leveraging their decades of tried-and-true transducer design into each and every one of these, for the designer's piece of mind.

The 4 mm square by 2 mm high SMT-0440-T-R top-firing electro-mechanical transducer features a minimum SPL of 70 dBA at 10 cm with only 3V (0-peak) input at 4 kHz.
Unit of Measure

Specifications

Available

 N/A {0}

Manufacturer Stock

 N/A {0}

Brands

 N/A PUI Audio™

Manufacturer

 N/A PUI Audio�, Inc.

Rated Voltage (V0-p)

 N/A 3 V

Operating Voltage Range (V0-p)

 N/A 2 ~ 4 V

Impedance

 N/A 17 Ω

Impedance Tolerance (±)

 N/A 3 %

Minimum Sound Pressure Level (SPL) at 10 Centimeter (cm)

 N/A 70 dBA

Resonant Frequency

 N/A 4000 Hz

Resonant Frequency Tolerance (±)

 N/A 500 Hz
Maximum Current Draw1 N/A 90 mA

Housing Material

 N/A Liquid Crystal Polymers (LCP)

Terminal Material

 N/A Tin Plated Brass

Operating Temperature

 N/A -20 ~ +70 ºC

Storage Temperature

 N/A -30 ~ +80 ºC

Size

 N/A 4 mm

Tolerance (±)

 N/A 0.5 mm

Angle Tolerance (±)

 N/A 3 º

Weight

 N/A 0.1 g

Industry Standards

 N/A Restriction of Hazardous Substances (RoHS) 2011/65/EU

Reliability Testing

High Temperature Test

 N/A 96 hours at +70 ºC ± 2 ºC followed by two hours in normal room temperature

Low Temperature Test

 N/A 96 hours at -20 ºC ± 2 ºC followed by two hours in normal room temperature

Humidity Test

 N/A 25 ± 2 ºC at 90-95% RH for 5 hr, then to 55 ± 2 ºC at 90-95% RH for 5 hr, then to 25 ºC ± 2 ºC at 90-95% RH for 0.5 hr, 10 cycles

Vibration Test

 N/A 10-50 to 10 Hz in three perpendicular directions for two hours each.

Drop Test

 N/A Drop transducer from a 70 cm height onto a 10 mm thick wooden board in three directions.

Note for Reliability Testing

 N/A After each test, the part's SPL, frequency response, and current draw shall meet specifications.

Features

Features

 N/A
  • Ultra-small design for wearable devices
  • High output in a small, lightweight package
  • Pick-and-place and reflow compatible

Note

Note

 N/A Specifications subject to change or withdrawal without notice.
  • 1 Rated voltage, 50% duty cycle, at resonant frequency