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SC1812ML240K Datasheet(PDF) 6 Page - Socay Electornics Co., Ltd.

Part # SC1812ML240K
Description  Surface Mount Multilayer Varistor
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Manufacturer  SOCAY [Socay Electornics Co., Ltd.]
Direct Link  http://www.socay.com
Logo SOCAY - Socay Electornics Co., Ltd.

SC1812ML240K Datasheet(HTML) 6 Page - Socay Electornics Co., Ltd.

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Surface Mount Multilayer Varistor
Revision November 28, 2013
6 / 8
@SOCAY Electronics Co., Ltd. 2013
Specifications are subject to change without notice.
Please refer to www.socay.com for current information.
SC0805ML - SC2220ML Series
SOCAY Electronics Co., Ltd.
www.socay.com
(a) Preheat
1. The temperature rising speed is suggested to be
2~4
ºC /s
2.
Appropriate preheat time will be from 60 to 120
seconds.
(b) Heating
1. Careful about sudden rise in temperture as it may
worser the solder ability.
2.
Set the peal temperature in the range from 215
ºC
to 225
ºC.
(c) Cooling
1. Careful about slow cooling as it may cause the
position shift of component.
l Hand Soldering
In hand soldering of the varistors. Large temperature gradient between preheated the varistors and the tip of soldering iron
may cause electrical failures and mechanical damages such as cracking or breakings of the devices. The soldering shall be
carefully controlled and carried out so that the temperature gradient is kept minimum with following recommended conditions
for hand soldering.
(a) Recommended Soldering Condition 1
1. Solder:
1mm Thread solder (sn63:pb37) with soldering flux in the core.
Rosin-based and non-activated flux is recommended.
2. Preheating
The varistors shall be preheated so that Temperature Gradient between the devices and the tip of soldering iron is
150
ºC or below.
3. Soldering Iron
Rated Power of 20w max with 3mm soldering tip in diameter.
Temperature of soldering iron tip 300C max ( The required amount of solder shall be melted in advance on the
soldering tip.)
4. Cooling
After soldering. The varistors shall be cooled gradually at room ambient temperature.
(b) Recommended Soldering Condition 2(Without preheating)
1. Solder iron tip shall not directly touch to ceramic dielectrics.
2. Solder iron tip shall be fully preheated before soldering while soldering iron tip to the external electrode of varistors.
l Post Soldering Cleaning
(a) Residues of corrosive soldering fluxes on the PC board after cleaning may greatly have
influences on the electrical
characteristic and the reliability (such as humidity resistance) of the varistors which have been mounted on
the board. It shall be confirmed that the characteristic and the reliability of the devices are not affected by the
applied cleaning conditions.
(b) When an ultrasonic cleaning is applied to the mounted varistors on PC Boards. Following
conditions are recommended
for preventing failures or damages of the devices due to the large vibration energy and the resonance caused
by the ultrasonic waves.
1. Frequency 29MHz max
2. Radiated Power 20w/lithr max
3. Period 5minuets max
Soldering Recommendations
(Continue)
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
200
150
100
50
0
250
Time (Minutes)
Max. temperature 225
ºC
Seconds above
solder melting point
45-80
Ramp rate <2
ºC /s
Preheat dwell
Preheat zone


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