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SVC330D-07B Datasheet(PDF) 8 Page - SAMWHA ELECTRIC |
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SVC330D-07B Datasheet(HTML) 8 Page - SAMWHA ELECTRIC |
8 / 10 page DISC Ceramic Capacitors 129 SAMWHA CAPACITOR Co., Ltd. 128 Applications Power Supply Circuit Protection The Protection of semiconducting elements such as diodes, thyristors, transistors, IC and relays against transient Voltages. Similar protection of many types of measuring instruments, control machinery and communication equipment and broadcasting equipment against inductive lightning and switching surges. Protection of general purpose electrical equipment, domestic mechinery and appliances. TV and radios and similar consumer products against lightning and switching surges. Line circuit Varistor voltage selection table (ZL) Power Supply Voltage Type SVC201D -□□A 100V AC SVC221D -□□A SVC241D -□□A SVC271D -□□A* SVC391D -□□A 200V AC SVC431D -□□A SVC471D -□□A* 12V DC SVC220D -□□B 24V DC SVC390D -□□B Line and groud circuit Varistor voltage selection table(ZE) Power Supply Voltage Type 100V AC SVC431D -□□A SVC471D -□□A 200V AC SVC751D -□□A to SVC112D -□□A* SVC182D -□□A** Power Supply Voltage Type SVC180D -□□B 12V DC SVC220D -□□B SVC820D -□□A 24V AC SVC390D -□□B SVC820D -□□A Notes : ① The power supply voltage must not exceed the maximum allowable circuit voltage. ② Since independent wiring loads and capacitive loads cause the voltage build-up at the time of opening or closing the load, use SVC having a varistor voltage as high as possible.(*mark) ③ The bold faced portions of the type letters vary. AC/DC single-phase circuit AC three-phase circuit Notes : ① When subjected to megger testing(500V DC), the insulation resistance value can decrease due to the leakage current of the SVC, To avoid this remove the varistor or use* marked SVC. ② When subjected to dielectric strength test(1000V AC). remove the SVC or use** marked SVC. Select varistors taking a note of operating conditions peculiar to the equipment. Notes : The varistor SVC has a capacitance value. Take not of this when applying them to high-frequency signal circuits. AC/DC single-phase circuit AC three-phase circuit Telecommunication Circuit Protection Varistor voltage selection guied Power Supply Voltage Type 12V DC SVC220D -□□B 24V DC SVC390D -□□B 100V DC SVC151D -□□A SVC201D -□□A 100V AC SVC221D -□□A SVC241D -□□A SVC271D -□□A Notes : ① The power supply voltage must not exceed the maximum allowable circuit voltage of the SVC ② Pay due attention to the surge energy generated by the load. ③ Select SVC referring to the pulse lifetime rating. ④ To further reduce the tendency of sparking across the contacts connect a capacitors parallel with the SVC. This will also protect the equipment from electromagnetic wave jamming. ① Connect the SVC at a position nearer to the equipment than the overcurrent protection device“Ⅰ”(fuse, MCCB) as is shown in the diagram. When the SVC is shorted, the overcurrent protection device “Ⅰ”operates (trips or blow off the fuse). ② If the overcurrent protection device“Ⅰ”can not be installed in“Ⅰ”position, connect a fuse at“Ⅱ”position. Select fuse rated current for the SVC referring to the following table. ③ When“Z2”SVC is connected between the equipment and ground install an ELCB (Earth Leakage Circuit Breaker). If not possible, connect a fuse or thermal fuse at“Ⅲ”position. Installation ① When operated at location near heating element or exposed to direct sun light, confirm that the ambient temparature range. ② When operated in dusty or dirty locations, or exposed to corrosive atomospheres, or where metallic powders or salt can be expected, be sure to mount within a protective enclosure. Molding When shielding the SVC in a resin molding, take a note of the materials used and temperature, since they influence the reliability. For further information please contact SAMWHA Current, power and energy rating vs, temperature Electrical Characteristics Switching Circuit Protection Application Notes Overcurrent protection Varistor voltage selection guide Protection of relay (Contact coil) Protection of semiconductors When surges exceed the rating for the SVC, short-circuits or damages can be expected. Take following precautions. SVC 05A 07A 10A 14A 20A 05B 07B 10B 14B 20B Applicable fuse 1 to 2 2 to 3 3 to 5 3 to 10 5 to 15 rated current(A) Operating ambient temperature -40℃ to +85℃ Storage temperature -40℃ to +125℃ Voltage temperatur coefficient -0.05% ℃ Insulation resistance(at500V) Over 1000MΩ SVC Varistors Type |
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