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001-01 / 20010914 / ef531_pb.fm
Piezoelectronic Products
Buzzers
Pin Terminal/Lead
FEATURES
• The PB series are high-performance buzzers with a unimorph
piezoelectric ceramic element and an integral self-excitation
oscillator circuit.
• They exhibit extremely low power consumption in comparison to
electromagnetic units.
• They are constructed without switching contacts to ensure long
life and no electrical noise.
• Compact, yet produces high acoustic output with minimal
voltage.
APPLICATIONS
Fire alarms, smoke detectors, home security systems, call buzz-
ers, car alarm systems, clocks, and cash registers.
ELECTRICAL CHARACTERISTICS
Resonant
Operating
frequency (kHz)
voltage Edc(V)
PB2130UP002A
3.3±0.8
4 to 15
PB2320UP002A5
2±0.5
4 to 17
PB2130UP002C
3.3±0.8
4 to 15
PB2130UL100A
3.3±0.8
4 to 15
• Measured at 25°C, operating temperature range –20 to +60°C
Part No.
PB Series
Sound pressure
(dB(A)/100cm)
75min.
70±5
65min.
75min.
Consumption
current (mA)max.
20
20
20
20
Testing
voltage (V)
12
12
12
12
Terminal
construction
Pin terminal
Pin terminal
Pin terminal
Lead
SOUND MEASURING METHOD
DC power
supply
Ammeter
Buzzer
Standard
microphone Amplifier
10cm
Recorder
Anechoic chamber
Filter
(A curve)
Frequency counter
•20dB is subtracted from the 10cm measured value, and converted to 1m value.
VOLTAGE BUZZER SOUND CONTROLS
When resistance is connected in series (as shown in illustrations
(a) and (b)), abnormal oscillation may occur when adjusting the
sound volume. In this case, insert a capacitor in parallel to the volt-
age oscillation board (as shown in illustration (c)). By doing so,
abnormal oscillation can be prevented by grounding one side.
However, the voltage V
B
added to the voltage oscillation board
must be within the maximum input voltage range, and as capaci-
tance of 3.3µF or greater should be connected.
+
R
+
R
PB
R
PB
3.3µF
+
V
B
+
PB
(a)
(b)
(c)
• All specifications are subject to change without notice.
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001-01 / 20010914 / ef531_pb.fm
Piezoelectronic Products
Buzzers
Pin Terminal
SHAPES AND DIMENSIONS
PB2130UP002A
ø0.8+0.2, –0.1
PB Series
SOUND PRESSURE-
CURRENT
CHARACTERISTICS
Sound pressure (dB)
100
Sound pressure
90 characteristics
80
70
60
20
Current (mA)
PRECAUTIONS FOR USE
TDK’s PB series piezoelectric buzzer has an oscillation circuit. It
therefore sounds when a DC voltage is supplied. Bear the follow-
ing precautions in mind before use.
• The input polarity. Make sure to connect it correctly.
• Do not supply to the buzzer any voltage greater than
permissible.
• Use a regulated DC power supply voltage with low ripples.
• Avoid using the buzzer outdoors. It is designed for indoor use. If
it has to be used outdoors, provide a waterproofing and other
necessary measures. It may not operate properly if terminals
have subjected to moisture.
• Avoid washing the buzzer to allow solvent or gas to enter it;
otherwise solvent that has entered from the sound release hole
may stay in it a long time and affect its performance.
• A piezoelectric ceramic in approximately 100 micron meters
thickness is used as a buzzer sound generator. If the ceramic is
pressed with a pin or the like through the sound release holes, it
may be damaged. Do not stack these buzzers.
• Do not apply any mechanical force to the buzzer; otherwise
the buzzer case may be deformed and result in improper buzzer
operation.
• Do not place any shielding material or the like just in front of the
sound release hole of the buzzer; otherwise the sound pressure
may vary and result in unstable buzzer operation. Make sure
that the buzzer is not affected by a standing wave or the like.
• It is recommended that the PB23 type buzzer be installed off a
printed circuit board because the buzzer case and terminal
vibrate; otherwise resonance may occur on the board.
• Do not bend the terminal pin; otherwise the state of vibration
between the case and terminal pin or board may vary and result
in a characteristic change, causing the buzzer to make no
sound.
• The terminal pin of the buzzer must be soldered at 270°C
(soldering iron trip) within 3 seconds.
• Do not use the buzzer in an atmosphere containing corrosive
gas (H
2
S etc.) for a long time; otherwise the circuit parts or
sound generator may corrode and result in improper buzzer
operation.
• Do not drop the buzzer; handle it carefully.
2-ø2.8
16
2.5
5±1
30
25
ø21
(+)
(–)
Lot No.
10±1
12.7±0.5
10
Current
characteristics
50
0
0 5 10 15 20
Input voltage Edc (V)
PB2320UP002A5
ø0.8+0.2, –0.1
Sound pressure (dB)
100
90
Sound pressure
80 characteristics
70
60
20
Current (mA)
Current (mA)
ø23
ø4.4
16
12.7±0.5
(–)
Lot No.
5±1
(+)
10
Current
characteristics
50
0
0 5 10 15 20
Input voltage Edc (V)
PB2130UP002C
ø0.8+0.2, –0.1
Sound pressure (dB)
100
90 Sound pressure
characteristics
80
70
60
50
0
Current
characteristics
5 10 15 20
Input voltage Edc (V)
20
10
0
12
5±1
ø21
(+)
(–)
Lot No.
10±1
PB2130UL100A
30
25
ø21
2-ø2.8
16
2.5
Lot No.
100±10
Red
(+)
Black
(
–
)
10±3
(1 to 3)
Dimensions in mm
Tolerance: ±0.3
• All specifications are subject to change without notice.
12.7±0.5
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