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SFI2220ML270A Dataheets PDF



Part Number SFI2220ML270A
Manufacturers SFI
Logo SFI
Description SMD Transient Voltage Suppressors
Datasheet SFI2220ML270A DatasheetSFI2220ML270A Datasheet (PDF)

SMD Transient Voltage Suppressors Table of contents Table of Contents…………………………………………..……… 1-1 Introduction…………………………………………………..….. 2-2 Transient Voltage Suppressors…………………………………. 3-3 Information for Designer…………………………………………. 4-5 Multilayer varistor introduction …………………….….……… 6-6 Part number identification ………………………………… 7-7 ML - A Series High surge protection………………………….. 8-8 ML - C Series Classification…….………………………………. 9-11 CH Series………………..………………………………….……… 12-12 ESD solution protection vari.

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SMD Transient Voltage Suppressors Table of contents Table of Contents…………………………………………..……… 1-1 Introduction…………………………………………………..….. 2-2 Transient Voltage Suppressors…………………………………. 3-3 Information for Designer…………………………………………. 4-5 Multilayer varistor introduction …………………….….……… 6-6 Part number identification ………………………………… 7-7 ML - A Series High surge protection………………………….. 8-8 ML - C Series Classification…….………………………………. 9-11 CH Series………………..………………………………….……… 12-12 ESD solution protection varistor…………………………. Array Varistor………………………………………………… MOV Disc Varistor protection……………………………….. New development item 13-13 14-14 15-15 16-16 Package information…………………………………………….. 17-17 Typical application ………………………………………………. 18-18 Test information………………………………………….………. 19-19 Reliability experiment……………………………………………. 20-20 Recommendation for soldering……………………………….. 21-22 Cross reference …………………………………………….. 23-24 1 Free Datasheet http://www.Datasheet4U.com SMD Transient Voltage Suppressors Introduction Company Profile SFI, is the trading mark and logo of SFI Groups, which are established under the spiritual concept of “Innovation, Services, Quality, and sincerity”. There are three subsidiary companies under SFI Groups, including Sun Flower semiconductor Co., Ltd established in Aug 1999(known as Sun Flower Instruments Inc. established in 1984) is responsible for the production mainly on mono-chip, multilayer chip TVS, advanced varistors etc. and the nearly completed brand factory, Leader Well Technology Co., Ltd for satisfying the tremendous supplies of the worldwide demand on the varistor in the new century, and the mission of SFI Electronics Technology Inc is responsible for the marketing and sales under the independent responsibilities on production, marketing and sales. Advanced Techniques Applied In order to meet the market trend and fast market change, we build our R&D team to control the reliability and stability of the products. We have been utilizing the advanced material and manufacturing techniques on producing the electronic elements and parts. In Taiwan, we are the first company to launch the Zinc Oxide (ZnO) based Ceramic Semiconductor devices with full range and with the highly advanced multilayer formation technologies to apply the high density circuit assemblies. We obtained many kinds of patents and awards for excellent product designs, and had been selected by government to attend the international trade fair on behalf of Taiwan. Our SFI varistors and TVSs reliably protect the electronics systems from overvoltages by limiting surge voltages and by absorbing energy. They are used to safeguard the components, to ensure electromagnetic compatibility and suppress the transients caused by electrostatic discharge. In other words they have the added advantage of greater surge current and energy handling capabilities as well as EMI/RFI attenuation. SFI varistors and TVSs have established themselves as a secure and low-cost means of protection in general-purpose use. 2 Free Datasheet http://www.Datasheet4U.com SMD Transient Voltage Suppressors Transient Voltage Suppressor Major Additions and Improvements Multilayer Surface Mount Transient Voltage Suppressors (TVS) are manufactured from semiconducting ceramics by the highly advanced multilayer formation technologies, which can offer rugged protection, excellent transient energy absorption and internal heat dissipation. The devices are leadless chip form, eliminating lead inductance and guaranteeing a faster speed of response time of less than 0.5ns, which makes them fast enough to ensure reliable protection against ESD pulse and other specific transient events. These transient suppression devices are significantly smaller footprints and lower profiles than traditional zener diodes or radial MOVs, multilayer formation technologies Section of the chip Material: 1. Body material: ZnO 2. Termination: electrode Ag/Ni/Sn termination is Free Datasheet http://www.Datasheet4U.com SMD Transient Voltage Suppressors Information for Designer Voltage Dependent Characteristic Transient Voltage Suppressors (varistors ) are voltage-dependent electrical resistors with symmetrical V/I characteristic and the breakdown region, their resistance value decreases with increasing voltage, thus “short-circuiting” further rises in overvoltage. Voltage(V) Breakdown Region Current (A) The Prevention of Overvoltage In other words, as long as the voltage increases above the threshold of the TVS, the suppressor will draws a rapidly increasing current, and then the overvoltage is considerably attenuated away from the protected circuit, that is why the inherent protection of the equipments should be supplemented by including specific components that will raise the withstand capabilities to the required level. Varistors provide protection against all kinds of overvoltage and prevent electronic equipment from being damaged by transient events. Circuit to be Protected Normal State Ov.


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