P. 1/11 Document No. JGB40-1639 Specification of Piezoelectric Sounder Issue Date : April 6, 2020 1. Part Number Murata Part Number PKMCS0909E48H0-R1 Taping 2. Scope This product specification is applied to the piezoelectric sounder used for sounder in alarm systems . Please contact us when using this product for any other applications than described in the above. 3. Appearance and Dimensions 3-1 : Appearance : No illegible marking. No visible dirt. 3-2 : 9 Dimensions of component : Please refer to item 9 for component dimensions. 4. Maximum Rating Item Specification 4-1 12.5Vo-p /max. Maximum Input Voltage 4-2 -40 +85 Operating Temperature Range -40 to +85C 4-3 -40 +85 Storage Temperature Range -40 to +85C 5. Electrical Characteristics Item Specification 5-1 72dB /min. Sound Pressure Level Refer to next item for measuring method. Murata Manufacturing Co.,Ltd. P. 2/11 Document No. JGB40-1639 6. Measuring Method 6-1 S.P.L. Measuring Circuit 2.5Vo-p, 4.8kHz, Input Signal 2.5Vo-p, 4.8kHz, Square wave 0.1m Mic. Pre Amp. Audio Analyzer Piezoelectric Sounder Measuring equipment /Mic. Type4191 (Brel & kjr) / or Equivalent /Pre Amp. Type2669 (Brel & kjr) / or Equivalent / Audio Analyzer Type3560C (Brel & kjr) / or Equivalent 6-2 Measuring Condition 0.1m +25 3 60 10 R.H. +5 +35 , 45 85% After mounting products on PCB( 0.1m), standard conditions for the measurement shall be +25 3 C temperature and 60 10%R.H. humidity. The measurement shall be performed at the temperature of +5 to +35 C and the humidity of 45 to 85%R.H. unless otherwise the result is doubtful. Murata Manufacturing Co.,Ltd.