Piezoelectric Acoustic Generators Piezo Ceramic Elements - Self Oscillating Type Features: How To Order: 1) Connection to a self oscillating circuit produces clear sounds with high sound pressure level 2) Low power consumption 3) Thin, lightweight 4) No-contact design makes element highly reliable and eliminates noise problems KBS - 35 - DA - 3 - G - 2 - 3 Applications: 1) Smoke detectors, security alarms, and other warning devices 2) pocket pager/alarms, electronic calculators, and consumer products 3) Telephones Dimensions FC type G type Note: See specifications for values of A, B, C, etc. Standard AVX/Kyocera Lead Wire ( 3 electrode devices ) GC type W: Thickness L: Length (mm) AWG-32 (UL-1571) 50 ± 5, 75 ± 5, 100 ± 10, 125 ± 10, 150 ± 15 S: Stripped Part Length (mm) 3 ± 1, 5 ± 1 C: Color red, black, blue GC type only. FC not available with lead wires. 10 1 2 3 4 5 6 7 1 Model 2 Diameter (mm) eg. 35 3 Element shape (Disc-Shaped Piezoelectric Buzzer) 4 Resonant Frequency: eg. 3kHz 5 3-Terminal Electrode Type FC = F-Shaped Pattern G = G-Shaped Pattern GC = G-Shaped Pattern with lead 6 Disc Material S = Stainless Steel Blank = Brass 7 Classification for elements of the same shape (in case of partial modification of standard specifications only) Piezoelectric Acoustic Generators Piezo Ceramic Elements - Self Oscillating Type Specifications (G type Self Oscillating Type) Resonant Frequency (kHz) Model No. 4.6 ± 12.9 ± 13.2 ± 13.2 ± 12.2 ± KBS-27DA-5G KBS-35DA-3G KBS-35DA-3GS KBS-35DA-3GS-6 KBS-41DA-2G Resonant Impedance (Ω) 0.5 0.5 0.5 0.3 0.3 200 200 200 200 200 Static Capacitance (pF) 16,000 25,000 25,000 25,000 20,000 ± ± ± ± ± 30% 30% 30% 30% 30% Dimensions (mm) Metal Disc (φA) 27.0 ± 0.1 35.0 ± 0.1 34.55 ± 0.1 34.55 ± 0.1 41.47 ± 0.1 Ceramic Disc (φB) 20.2 ± 0.3 25.0 ± 0.5 25.0 ± 0.5 25.0 ± 0.5 25.0 ± 0.5 Metal Disc (φA) 34.55 ± 0.1 Ceramic Disc (φB) 25.0 ± 0.5 Electrode (φC) (19.0) (23.6) (23.6) (23.5) (23.6) Metal Disc Total Thickness Metal Disc Material (T) Thickness (t) 0.53 ± 0.1 0.25 ± 0.03 Brass 0.53 ± 0.1 0.25 ± 0.03 Brass 0.53 ± 0.1 0.25 ± 0.03 Stainless Steel 0.53 ± 0.1 0.25 ± 0.03 Stainless Steel 0.53 ± 0.1 0.35 ± 0.04 Brass (F type) Resonant Frequency (kHz) Model No. Resonant Impedance (Ω) 3.2 ± 0.5 KBS-35DA-3FCS 200 Static Capacitance (pF) 25,000 ± 30% Dimensions (mm) Electrode (φC) (23.0) Metal Disc Total Thickness Metal Disc Material (T) Thickness (t) 0.53 ± 0.1 0.25 ± 0.03 Stainless Steel Application Circuits for Self-Drive Oscillation Buzzer +V R2 R1 R3 A R3 Tr Transistor Oscillation R1: 200KΩ R2: 100KΩ R3: 500Ω R3: 1.5MΩ R1: 1MΩ C1: 1000pF R1 C1 B Alarm IC Oscillation NOTE: Wherever possible, the piezo devices should be capacitive coupled to avoid permanent DC bias and possible long term damage. 11