The Sonitron Multi-Application buzzers (SMA) and transducers (SMAT) are specifically developed to meet a wide range of requirements in sound pressure, dimensions, and mounting methods. These series produce highly reliable audible signals, giving either an extremely clear penetrating tone or a soft sound output. The buzzers and transducers are low-cost commercial-grade components for large volume applications.
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Advantages SMA
| Advantages SMAT
|
Applications
 |  |  |
| Toys & Games | ATM | Measuring & Weighing equipment |
 |  |  |
| Portable equipment | Instrumentation & control systems | Copiers |
 |  | |
| Vendor machine | Timers & Clocks |
Specifications SMA
| Model | SPL * (dB(A) | Frequency +/- 15% (Hz) | Operating Voltage (Min. -max.) | Operating current (mA) | Weight (g) | ||||
|---|---|---|---|---|---|---|---|---|---|
| SMA-13 | 75 | 3000 | 1.5 to 24 | 1.8 | 1 | ||||
| SMA-13LT | 82 | 3000 | 1.5 to 15 | 11.6 | 1 | ||||
| SMA-13LC | 81 | 3000 | 1.5 to 15 | 0.7 | 1 | ||||
| SMA-13LV | 80 @3V | 3350 | 2 to 4 | 13 @3V | 1 | ||||
| . | |||||||||
| SMA-17 | 82 | 3000 | 1.5 to 24 | 3.3 | 2 | ||||
| SMA-17LT | 86 | 3000 | 1.5 to 15 | 15 | 2 | ||||
| SMA-17LC | 89 | 3500 | 1.5 to 15 | 0.8 | 2 | ||||
| . | |||||||||
| SMA-21 | 85 | 3300 | 1.5 to 24 | 3.8 | 2.5 | ||||
| SMA-21LT | 90 | 3300 | 1.5 to 15 | 12.5 | 2.5 | ||||
| SMA-21LC | 91 | 3800 | 1.5 to 15 | 1.1 | 2.5 | ||||
| SMA-21LV | 87 @3V | 3000 | 2 to 6 | 13 @13V | 2.5 | ||||
| . | |||||||||
| SMA-24 | 92 | 3000 | 1.5 to 24 | 4.2 | 4 | ||||
| SMA-24L | 98 | 3000 | 1.5 to 15 | 6.7 | 4 | ||||
| SMAI-24 | 92 | **3500 | 5 to 24 | 6.2 | 4 | ||||
| . | |||||||||
| SMA-30 | 87 | 2500 | 1.5 to 24 | 4.1 | 5 | ||||
| SMA-30L | 97 @9V | 2500 | 3 to 9 | 5 @9V | 5 | ||||
*All measurements are made in free air @21°C @30cm @12Vdc ( Except for the SMA-21LV & SMA-30L). Buzzers soldered on a PCB board with dimensions of 24cm x 11cm.
** SMAI 24: intermittent pulse rate of 5 HZ (@15 Vdc). All the other models have a continuous tone.
| Operating temperature | -20°C to +70°C |
| Storage temperature | -40°C to +85°C |
| Lifetime (at 21°C) | @12Vdc (L-version working @6Vdc) continuous use min. 100 hours. The SMA-21LV (PIN/SMD) working @3Vdc in continuous use: min. 24hours. All tests are made @20°C mounted on PCB |
| Case material |
|
| Standard color of case | Grey |
| Weight | 64g |
Specifications SMAT
| Model | SPL * (dB(A) | Frequency Range (Hz) | Capacitance (+/- 30%) nF) | Operating voltage (VAC pp) | Weight (g) | ||||
|---|---|---|---|---|---|---|---|---|---|
| SMAT-13 | see graph | 800-5000 | 7.8 | Sine wave Square wave | 0 to 30 Vpp 0 to 21 Vpp | 1 | |||
| SMAT-17 | see graph | 800-5000 | 17.5 | Sine wave Square wave | 0 to 30 Vpp 0 to 21 Vpp | 2 | |||
| SMAT-21 | see graph | 600-5000 | 12.4 | Sine wave Square wave | 0 to 30 Vpp 0 to 21 Vpp | 2.5 | |||
| SMAT-24 | see graph | 400-5000 | 18.6 | Sine wave Square wave | 0 to 30 Vpp 0 to 21 Vpp | 4 | |||
| SMAT-30 | see graph | 300-5000 | 25 | Sine wave Square wave | 0 to 30 Vpp 0 to 21 Vpp | 5 | |||
| Operating temperature | -20°C to +70°C |
| Storage temperature | -40°C to +85°C |
| Lifetime (at 21°C) | @12Vpp continuous use in resonance frequency, tested on maximum sound pressure (eg. SMAT-21 @3.75kHz ). Life expectations: min. 100 hours. All tests are made at @20°C mounted on PCB. |
| Case material |
|
| Standard color of case | Grey |
| Weight | 64g |
Sound pressure level vs. voltage
All measurements are made @30 cm in free air @21°C; ** Standard versions respectively SMA-13, SMA-17, SMA-21, SMA-24, and SMA -30.
Sound pressure level vs. voltage SMAT series
All measurements are made @30cm in free air @21°C.
Drive Circuits ( typical circuits)
Dimensions SMA & SMAT-series (All dimensions are in mm)
*The soundhole of SMA-21 LV has a diameter of 3mm, whereas the other SMA-21 types have a 3.8mm soundhole.
Standard product options
| Option code | example | Description |
|---|---|---|
| SP01 | SMAT-21-P10/SP01 | Contains heavy-duty wires ( plastic insulation) Only for SMA(T)-21 and SMA(T)-24 |
| SP02 | SMAT-21-P17.5/SP02 | Contains heavy-duty wires ( plastic insulation), connection sealed with silicone. Only for SMA(T)-21 and SMA(T)-24 |
| SP04 | SMA-13LC-S/SP04 | The PCB of the buzzer/ transducer is secured with epoxy-adhesive |
| SP05 | SMA-24L-P17.5/SP05 | Extended frequency control (only SMA series) |
| Wash Tab | SMAT-13-P7.5 + Wash Tab | Recommended for automatic washing production process. The PCB is secured with epoxy-adhesive + wash tab upon the sound-emitting hole, avoiding liquid penetration into the cavity. To be removed after the washing process for good sound output!!! |
| MC | SMA-13-P10-MC | Acryl coating (Membrane Coating). Recommended for aggressive, humid, or smoggy environment. |
| FP13, FP13SR, FP17, FP17SR, FP21, FP24, FP30 | 7 different Foam Patches are available to cover the SMA(T) series for extra acoustic and mechanical stabilization. |
*Add an option by mentioning the suffix to the model of the SMA series!
!! Other options can be made based on your requirements, please contact our support team at support@sonitron.be
| Kapton | A heat protection label standard for all SMD buzzers, in Kapton material glued on the SMD model of the SMA(T) buzzer. This enables the user to pick up the buzzer by vacuum. During the re-flow soldering process, the heat shield remains on the buzzer and must be removed after soldering. |
Product codification
List of available products
Mounting guidelines for the SMA & SMAT series
Sonitron piezoelectric multi-application transducers “SMAT series”, in combination with the piezo driver “MAS6240” of Micro Analog Sytems
Appnote_SMATseries_and_MAS6240
Discover the wide range of available product options and ensure the long lasting functionality of our Piezo components.
more information –> https://www.sonitron.be/soundcomponentlifetime/
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