Part No: CMT-1303
Description: piezo audio transducer
Date: 9/12/2006
Unit: mm
Page No: 1 of 6
Specifications
Operating voltage
Current consumption
Sound pressure level
Electrostatic capacitance
Operating temperature
Storage temperature
Dimensions
Weight
Material
Terminal
RoHS
25 Vp-p max.
5 mA max.
at 5 Vp-p, square wave, 4.1 KHz
70 db min.
at 10 cm / 5 Vp-p, square wave, 4.1 KHz
16,000 pF ±30%
at 1 KHz / 1 V
-20 ~ +70° C
-30 ~ +80° C
ø12.8 x W12.8 x H2.5 mm
0.5 g max.
LCP (White)
SMD Type
yes
Appearance Drawing
Tolerance: ±0.2
Phone: 800.275.4899
Fax: 503.612.2381
www.cui.com
20050 SW 112th Ave.
Tualatin, OR 97062
Part No: CMT-1303
Description: piezo audio transducer
Date: 9/12/2006
Unit: mm
Page No: 2 of 6
Typical Frequency Response Curve
Measurement Method
S.P.L. Measuring Circuit
Input Signal: 5 V p-p, 4.1 KHz, Square Wave
Mic: RION UC 30
S.G.: Hewlett Packard 33120A Function Generator or equivalent
Phone: 800.275.4899
Fax: 503.612.2381
www.cui.com
20050 SW 112th Ave.
Tualatin, OR 97062
Part No: CMT-1303
Description: piezo audio transducer
Date: 9/12/2006
Unit: mm
Page No: 3 of 6
Mechanical Characteristics
Item
Solderability
Evaluation Standard
Test Condition
95% of the surface of the lead
Lead terminals are immersed in rosin for
pads must be covered with
5 seconds and then immersed in solder bath
fresh solder.
of 230 ±5°C for 2 ±0.5 seconds.
1) IR Reflow
Pre-heating conditions should be 140~160°C for
60 to 120 seconds. Ascending time up to
200°C should be longer than 30 seconds.
Heating conditions should be within 10 seconds
at 230°C min. Peak temperature should be
235°C. Then, place leave the buzzer in natural
conditions for 1 hour before measuring.
No interference in operation.
2) Soldering Iron
Soldering iron of 270 ±5°C should be placed
0.5mm above the buzzer’s electrode. Melting
solder through the soldering iron should be
applied to the electrode for 3±1 seconds. Then,
place the buzzer in natural conditions for
4 hours before measuring.
No damage or cutting off.
For 10 seconds, the force of 9.8N (1.0kg) is
applied to each terminal in axial direction.
The value of oscillation
The buzzer shall be measured after applying
frequency/current consumption
a vibration amplitude of 1.55 mm with 10 to
55 Hz band of vibration frequency for 1 minute should be ±10% of the initial
measurements. The SPL should
to each of the 3 perpendicular directions for
be within ±10dB compared with
2 hours.
the initial measurement.
Soldering Heat Resistance
Terminal Mechanical Strength
Vibration
Phone: 800.275.4899
Fax: 503.612.2381
www.cui.com
20050 SW 112th Ave.
Tualatin, OR 97062
Part No: CMT-1303
Description: piezo audio transducer
Date: 9/12/2006
Unit: mm
Page No: 4 of 6
Environment Test
Item
High temp. test
Low temp. test
Humidity test
Temp. cycle test
Test Condition
After being placed in a chamber at +80°C for
240 hours.
After being placed in a chamber at -30°C for
240 hours.
After being placed in a chamber at +40°C and
90±5% relative humidity for 240 hours.
The part shall be subjected to 5 cycles. One
cycle will consist of:
Evaluation Standard
The buzzer will be measured after
being placed at +25°C for 4
hours. The value of the
oscillation frequency/current
consumption should be ±10%
compared to the initial
measurements. The SPL should
be within ±10dB compared to the
initial measurements.
Reliability Test
Item
Operating (Life Test)
Test Condition
1. Continuous life test:
The part will be subjected to 48 hours of
continuous operation at +55°C with rated
voltage applied.
2. Intermittent life test:
A duty cycle of 1 minute on, 1 minute off, a
minimum of 5,000 times at room temp
(+25 ±2°C) with rated voltage applied.
Evaluation Standard
The buzzer will be measured after
being placed at +25°C for 4
hours. The value of the
oscillation frequency/current
consumption should be ±10%
compared to the initial
measurements. The SPL should
be within ±10dB compared to
the initial measurements.
Test Conditions
Standard Test Condition
Judgement Test Condition
a) Tempurature: +5 ~ +35°C
a) Tempurature: +25 ±2°C
b) Humidity: 45 - 85%
b) Humidity: 60 - 70%
c) Pressure: 860-1060 mbar
c) Pressure: 860-1060 mbar
Phone: 800.275.4899
Fax: 503.612.2381
www.cui.com
20050 SW 112th Ave.
Tualatin, OR 97062
Part No: CMT-1303
Description: piezo audio transducer
Date: 9/12/2006
Unit: mm
Page No: 5 of 6
Recommended Temperature Profile for Reflow Oven
Phone: 800.275.4899
Fax: 503.612.2381
www.cui.com
20050 SW 112th Ave.
Tualatin, OR 97062
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