SD1209T3-A1 Datasheet, PDF (5/5 Pages) TDK Electronics – Electromagnetic Buzzers

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SAFETY PRECAUTIONS FOR USING TDK ELECTROMAGNETIC BUZZER
Please be sure to read the specifications of TDK Electromagnetic Buzzer(hereinafter referred to as “the buzzer”) before use.
• Please pay sufficient attentions to the warnings for safe
• When performing dip soldering directly for installing on a printed
designing when using the buzzer.
circuit board, be careful so that smoke from the flux, or other
Incorrect usage may cause smoke or fire.
foreign materials, will not get into the sound emission hole.
• Do not make sound on the buzzer when it is close to ears.
• Do not clean(excluding products that can be cleaned).
Listening to the buzzer when it is close to ears, or continuant lis- • With regards to devices in which the consumers can touch the
tening to it for an extended period, may result in hearing disor-
buzzer, thoroughly warn consumers not to put foreign materials
ders.
(such as needles, hairpins, garbage, etc.) into the sound
Thoroughly warn consumers not to turn on the sound when the
emission hole.
buzzer is close to ears.
• As the buzzer uses a coil, it has an inductive load.
• Do not exceed the rated operation voltage range when using the
Protect the drive circuit by putting the diodes in parallel into the
buzzer.
buzzer.
If it is exceeded beyond the rated operation voltage, a built-in coil • Do not reconfigure the buzzer.
may generate heat, resulting in deterioration of the coil, which
• Sound pressure changes depending on the shape of the part to
may cause a drop in sound pressure or a change in the terminal
be installed in a device, or the installation location.
resistance value.
Check the buzzer in the mounted condition.
If a rare short circuit occurs due to heat generated in the built-in • The buzzer has polarities.
coil, a large electrical current flows to the equipment used, pos-
When installing, be careful not to make a mistake with the polar-
sibly causing it to emit smoke or fire.
ities. Incorrect polarities will cause the following irregularities.
• The buzzer is a magnetic type sounder.
• Without circuit type: Differences in sound pressure will be
Do not use it for any other purpose than a sound generation.
created.
• Do not use the buzzer in other than atmospheric air.
• With circuit type: No sound will be generated.
• Do not use the buzzer in the following environments (excluding • Frequencies other than the rated frequency will change the
cases in which countermeasures are taken).
characteristics (sound pressure), and may cause wide
• Corrosive gases (Cl2, NH3, SOx, NOx, etc.)
unevenness.
• Places to be exposed to dust.
• As the buzzer uses a magnet, it generates a surrounding
• Places where rain, fog, salt water, and the like will get on the
magnetic field.
buzzer.
When designing a device, etc., confirm that there are no irregu-
• After installing the buzzer when designing an apparatus, confirm
larities due to the magnetic field.
that there are no abnormalities by performing a reliability
• The characteristics of the buzzer may change because of the
evaluation test.
influence of an outside magnetic field.
• Do not exceed the rated operating temperature range when
Check the buzzer in the mounted condition, and take measures
using the buzzer.
such as shielding, etc.
• Do not use for an extended period at relative humidity in excess • Because of deterioration or damage, maintain in rated storage
of 90% (maximum wet-bulb temperature of 38°C).
temperature range, avoid environments where there are sudden
• When using the buzzer for a safety device or warning device,
temperature changes, direct sunlight, corrosive gases and dust,
take all surest measures such as providing a safety circuit or the
and store wrapped in order to avoid applying stresses.
joint use of another sounder with equivalent characteristics in
order to prevent accidents.
RECOMMENDED OPERATING CIRCUIT EXAMPLE
• The buzzer may be influenced by electromagnetic waves,
voltage changes, and ripple voltage.
VCC
Buzzer
Check the buzzer in the mounted condition, and take measures
such as safety circuits, shielding, etc.
• If the buzzer is molded or secured by adhesives, thermal
Oscillator
expansion stresses from the mold or adhesive agent may cause
circuit
R
Q
deterioration in a soldered terminal part.
Before molding or securing an adhesive, consider the type,
amount, hardening conditions, adhesive properties, etc., of the
sealing material, and confirm the reliability.
• Do not apply vibrations or shocks (such as dropping) larger than
the specified.
• Do not bend the terminal pin when soldering to install on a circuit
board.
• Do not apply larger than the specified force to the terminal pin.
• Do not apply force to the terminal pin at high temperatures
(when soldering).
• When soldering a terminal pin, perform the soldering in clean
conditions without contamination or rust in order to avoid poor
connections.
• All specifications are subject to change without notice.
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