Piezoelectric Miniature Speakers

Piezoelectric miniature speakers are devices that amplify an audio signal using piezoelectricity – a type of electric charge created when certain materials, such as ceramic, are placed under mechanical stress. They are distinguished from other types of speakers by their small size.

How do piezoelectric miniature speakers work?

Piezoelectric miniature speakers function via the piezoelectric element inside them. A voltage is applied to the piezoelectric element and a movement is generated. The movement is then converted into an audible noise through the use of ceramic resonators and diaphragms. They are often used in speaker systems found in computers and portable radios. Their advantage is that they can deal with a relatively high electrical load, and they are simpler to set up than other types of speaker.

Types of piezoelectric miniature speakers

Piezoelectric miniature speakers vary in terms of their capacitance, frequency range and sound level. They also have different connection methods, whether solder pads or simply glue. The speakers may be of different sizes, too, which affects the sound they can produce.


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Description Price Frequency Range Capacitance Sound Level Connection Method Lead Length Dimensions Operating Temperature Range Maximum Frequency Minimum Operating Temperature Maximum Operating Temperature Minimum Frequency Height Length Width
RS Stock No. 786-8917
Mfr. Part No.SPS-3530-03-C1
BrandSonitron
TWD198
Each
units
700 Hz → 20 kHz 220nF 81dB Solder Pads - 43.5 x 39 x 2mm -20 → +60 °C 20kHz -20°C +60°C 700Hz 2mm 43.5mm 39mm
RS Stock No. 786-8926
Mfr. Part No.SPS-4640-03-C1
BrandSonitron
TWD258
Each
units
400 Hz → 20 kHz 225nF 83dB Glue, Silicone - 50 x 46.3 x 2mm -20 → +60 °C 20kHz -20°C +60°C 400Hz 2mm 50mm 46.3mm
RS Stock No. 805-5225
Mfr. Part No.SPS-2220-03
BrandSonitron
TWD297
Each
units
700 → 20000 Hz 70nF 85dB Solder Pads - 20 x 1mm -20 → +60 °C 20kHz -20°C +60°C 700Hz 1mm 20mm -
RS Stock No. 786-8929
Mfr. Part No.SPS-6555-03-C1
BrandSonitron
TWD332
Each
units
300 Hz → 20 kHz 480nF 83dB Glue, Silicone - 65 x 55 x 2mm -20 → +60 °C 20kHz -20°C +60°C 300Hz 2mm 65mm 55mm
RS Stock No. 786-8932
Mfr. Part No.SPS-29-T00
BrandSonitron
TWD232
Each
units
1 → 20 kHz 480nF 86dB Adhesive Tape - 32 x 29 x 4.5mm -20 → +60 °C 20kHz -20°C +60°C 1kHz 4.5mm 32mm 29mm
RS Stock No. 786-8923
Mfr. Part No.SPS-8770-03-C1
BrandSonitron
TWD349
Each
units
200 Hz → 20 kHz 580nF 84dB Glue, Silicone - 87 x 70 x 2mm -20 → +60 °C 20kHz -20°C +60°C 200Hz 2mm 87mm 70mm
RS Stock No. 805-5294
Mfr. Part No.SCS-32-S SP02 FP
BrandSonitron
TWD316
Each
units
500 → 8000 Hz 66nF 80dB Pin, Solder Pads - 32.4 (Dia.) x 9.7mm -40 → +85 °C 8kHz -40°C +85°C 500Hz 9.7mm - -
RS Stock No. 786-8935
Mfr. Part No.SPS-41-T00
BrandSonitron
TWD265
Each
units
450 Hz → 20 kHz 880nF 90dB Adhesive Tape, Solder Pads - 43.5 x 41 x 4.5mm -20 → +60 °C 20kHz -20°C +60°C 450Hz 4.5mm 43.5mm 41mm
RS Stock No. 786-8939
Mfr. Part No.SPS-53-T00
BrandSonitron
TWD386
Each
units
300 Hz → 20 kHz 960nF 93dB Adhesive Tape - 61.2 x 53 x 4.5mm -20 → +60 °C 20kHz -20°C +60°C 300Hz 4.5mm 61.2mm 53mm
RS Stock No. 294-5668
Mfr. Part No.SCS-32P10
BrandSonitron
TWD149
Each
units
500 → 8000 Hz 66nF 100dB Pin 5.8mm 33.5 x 33.5 x 9.7mm -40 → +85 °C 8kHz -40°C +85°C 500Hz 9.7mm 33.5mm 33.5mm
RS Stock No. 294-5630
Mfr. Part No.SCS-17P10
BrandSonitron
TWD121
Each
units
1500 → 8000 Hz 20nF 92dB Pin 5.8mm 18.6 x 18.6 x 9.7mm -40 → +85 °C 8kHz -20°C +60°C 1.5kHz 9.7mm 18.6mm 18.6mm
RS Stock No. 786-8948
Mfr. Part No.SPS-68-T00
BrandSonitron
TWD560
Each
units
250 Hz → 20 kHz 1.16µF 93dB Adhesive Tape - 83.5 x 68 x 5mm -20 → +60 °C 20kHz -20°C +60°C 250Hz 5mm 83.5mm 68mm