SDR Series Electromagnetic Buzzers

By TDK Corporation 185

SDR Series Electromagnetic Buzzers

TDK's small and thin SMD type electromagnetic buzzers provide high sound pressure, compactness and reliability. TDK has adopted a liquid crystal polymer with high heatproof properties in the housing component of the SDR series. To support the diaphragm, metallic rings are now used instead of conventional resin materials to make the structure solid so that it is no longer affected by thermal expansion at reflow process temperature. Also, highly reliable epoxy adhesives and ultrasonic welding is applied to joints of individual parts. These improvements have allowed TDK to provide a small size of 8.5 mm square with a height of 4 mm and a high sound pressure.

Features and Benefits
  • Slim and one of the smallest surface mount types which make it great for mobile phones, ringers, and for alarm sounds and melodies from portable mobile devices
  • Highly magnetic material and a strong magnet used to provide high sound pressure
  • Highly reliable structure compliant with reflow processes
  • RoHS compliant
  • Rated voltage Eo-p(V): 3
  • Operating voltage Eo-p(V): 0 to 5
  • Frequency(Hz): 2670
  • Sound pressure level (dB(A)/10cm) typ.: 97
  • Sound pressure level (dB(A)/10cm) min.: 88
  • Rated current (mA(ave)) max.: 85
  • DC resistance(Ω) typ.: 16
  • Operating temperature range: -40°C to +85°C
  • Storage temperature range: -40°C to +85°C


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