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SC1812ML330K Datasheet(PDF) 6 Page - Socay Electornics Co., Ltd. |
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SC1812ML330K Datasheet(HTML) 6 Page - Socay Electornics Co., Ltd. |
6 / 8 page 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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