SDR08540M3-01 데이터 시트보기 (PDF) - TDK Corporation
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SDR08540M3-01 Datasheet PDF : 4 Pages
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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 soldering a terminal pin, perform the soldering in clean
designing when using the buzzer.
conditions without contamination or rust in order to avoid poor
Incorrect usage may cause smoke or fire.
connections.
• Do not make sound on the buzzer when it is close to ears.
• When performing dip soldering directly for installing on a printed
Listening to the buzzer when it is close to ears, or continuant lis-
circuit board, be careful so that smoke from the flux, or other
tening to it for an extended period, may result in hearing disor-
foreign materials, will not get into the sound emission hole.
ders.
• Do not clean(excluding products that can be cleaned).
Thoroughly warn consumers not to turn on the sound when the • With regards to devices in which the consumers can touch the
buzzer is close to ears.
buzzer, thoroughly warn consumers not to put foreign materials
• Do not exceed the rated operation voltage range when using the
(such as needles, hairpins, garbage, etc.) into the sound
buzzer.
emission hole.
If it is exceeded beyond the rated operation voltage, a built-in coil • As the buzzer uses a coil, it has an inductive load.
may generate heat, resulting in deterioration of the coil, which
Protect the drive circuit by putting the diodes in parallel into the
may cause a drop in sound pressure or a change in the terminal
buzzer.
resistance value.
• Do not reconfigure the buzzer.
If a rare short circuit occurs due to heat generated in the built-in • Sound pressure changes depending on the shape of the part to
coil, a large electrical current flows to the equipment used, pos-
be installed in a device, or the installation location.
sibly causing it to emit smoke or fire.
Check the buzzer in the mounted condition.
• The buzzer is a magnetic type sounder.
• The buzzer has polarities.
Do not use it for any other purpose than a sound generation.
When installing, be careful not to make a mistake with the polar-
• Do not use the buzzer in other than atmospheric air.
ities. Incorrect polarities will cause the following irregularities.
• Do not use the buzzer in the following environments (excluding
• Without circuit type: Differences in sound pressure will be
cases in which countermeasures are taken).
created.
• Corrosive gases (Cl2, NH3, SOx, NOx, etc.)
• With circuit type: No sound will be generated.
• Places to be exposed to dust.
• Frequencies other than the rated frequency will change the
• Places where rain, fog, salt water, and the like will get on the
characteristics (sound pressure), and may cause wide
buzzer.
unevenness.
• After installing the buzzer when designing an apparatus, confirm • As the buzzer uses a magnet, it generates a surrounding
that there are no abnormalities by performing a reliability
magnetic field.
evaluation test.
When designing a device, etc., confirm that there are no irregu-
• Do not exceed the rated operating temperature range when
larities due to the magnetic field.
using the buzzer.
• The characteristics of the buzzer may change because of the
• Do not use for an extended period at relative humidity in excess
influence of an outside magnetic field.
of 90% (maximum wet-bulb temperature of 38°C).
Check the buzzer in the mounted condition, and take measures
• When using the buzzer for a safety device or warning device,
such as shielding, etc.
take all surest measures such as providing a safety circuit or the • Because of deterioration or damage, maintain in rated storage
joint use of another sounder with equivalent characteristics in
temperature range, avoid environments where there are sudden
order to prevent accidents.
temperature changes, direct sunlight, corrosive gases and dust,
• The buzzer may be influenced by electromagnetic waves,
and store wrapped in order to avoid applying stresses.
voltage changes, and ripple voltage.
Check the buzzer in the mounted condition, and take measures RECOMMENDED OPERATING CIRCUIT EXAMPLE
such as safety circuits, shielding, etc.
• If the buzzer is molded or secured by adhesives, thermal
VCC
Buzzer
expansion stresses from the mold or adhesive agent may cause
deterioration in a soldered terminal part.
Before molding or securing an adhesive, consider the type,
Oscillator
amount, hardening conditions, adhesive properties, etc., of the
circuit
R
Q
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).
• All specifications are subject to change without notice.
005-02 / 20070807 / ec211_sdr.fm
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