Original title: Transient voltage suppression diode
Brief introduction of TVS transient voltage suppression diode
TVS transient voltage suppressor diode is also known as surge suppressor diode, lightning protection tube and TVS tube, which is called transient voltage suppressor in English; Abbreviation: TVS；; It belongs to semiconductor discrete components, commonly known as semiconductors. Summarized in the category of semiconductor diode, it is a new product developed on the basis of zener diode technology. The structure of TVS transient voltage suppression diode is similar to that of zener diode, even the symbol and working principle are the same, but there are differences in structure. The biggest difference is that the PN junction area composed of general zener diode is very small, and it can bear less everse current. Generally, the maximum everse current of low-power voltage regulator (0.5~IW) is tens of mA to hundreds of mA. However, TVS transient voltage suppression diode has larger PN junction area, larger dissipated power, and allows the maximum everse current to reach several amperes to tens of amperes. Therefore, it can absorb instantaneous large current caused by instantaneous high voltage pulse. Generally, the zener diode is 0.5~3w, while the TVS transient voltage suppression diode reaches 30W to 1500w, and some for high voltage can reach more than 10kw. The TVS transient voltage suppression diode has two protection specifications, one-way protection and two-way protection.
Shenzhen Shunhai Technology Co., Ltd. is an authorized first-class agent distributor of TVS transient voltage suppression diodes of two famous domestic brands, "Shuokai" and "Saruiwei". It is mainly engaged in a full range of packaging specifications for protection devices of semiconductor diodes such as TVS transient voltage suppression diodes, plug-in TVS, conventional TVS, vehicle TVS, blue baby, surge suppression diodes and lightning protection tubes. Commonly used packages are SOD-123(SMF), DO-214AC(SMA), DO-214AA(SMB) DO-214AB(SMC), DO-204AL, DO-204AC, DO-201AD, P-600, DO-218AB and so on, such as Mass TVS tube stock, genuine guarantee, sample application, small quantity quick purchase, professional FAE support, customization, supply chain guarantee, research and development selection, technical question and answer. Our company has been focusing on semiconductors and electronic components for more than 20 years, which is your trustworthy enterprise. Then Xiaobian today mainly introduces two brands, "Shuokai" and "Saruiwei", in which the approximate package parameters and specifications of TVS transient voltage suppression diode are as follows.
The approximate parameter selection of TVS transient voltage suppression diode-shuokai -SMB series is as follows
The approximate parameter selection of TVS transient voltage suppression diode-saruiwei -DO-214AA package is as follows
TVS transient voltage suppression diode material identification diagram is as follows
Characteristics of TVS transient voltage suppression diode
(1) TVS diode is added to signal and power line, which can prevent microprocessor or single chip microcomputer from malfunction caused by instantaneous pulse, such as electrostatic discharge effect, surge of AC power supply and noise of switching power supply;
(2) The electrostatic discharge effect can release pulses over 10000V and 60A, which can last for 10ms；; The general TTL device will be damaged when it encounters a 10V pulse exceeding 30ms. Using TVS diode, it can effectively absorb the pulse that will cause device damage and eliminate the Crosstalk)； caused by switching between buses.
(3) The TVS diode is placed between the signal line and the ground, which can prevent the data and control bus from being affected by unnecessary noise;
The application of TVS transient voltage suppression diode
TVS transient voltage suppression diodes are widely used in small power supply protection, switches, POS machines, building intercom, monitoring system, parking card, transmission system, instruments and meters, communication products, control boards, GPS navigators and so on.
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Main performance parameters of TVS transient voltage suppression diode
(1) off-state voltage;
(2) Clamping voltage;
(3) Breakdown voltage;
(4) Peak current;
(5) Test current;
(6) Leakage current;
Selection steps of TVS transient voltage suppression diode
(1) to know the customer's products, working voltage, application port, protection level;
(2) Select the package and power of the device according to the application port and protection level;
(3) Select the package and power of the device according to the application port and protection level;
(4) Off-state voltage ≥1.2 times the working voltage in the circuit;
Working principle of TVS transient voltage suppression diode
(1) The device is connected in parallel with the circuit, and when the circuit works normally, it is in the cut-off state (high impedance state), which does not affect the normal operation of the circuit;
(2) When the circuit has abnormal overvoltage and reaches its breakdown voltage, it quickly changes from high impedance state to low resistance state, providing a low impedance conduction path for instantaneous current, and clamping the abnormal high voltage within a safe level, thus protecting the protected IC or circuit;
(3) When the abnormal overvoltage disappears, it returns to the high resistance state and the circuit works normally;
The above content mainly introduces the description, category diagram, general selection parameters of Shuokai and Saruiwei, material identification diagram, characteristics, application, main performance parameters, selection steps, working principle and other main information of TVS transient voltage suppression diodes. If you need TVS tube related products, please leave a message or call: 0755-28100016; Massive TVS tubes are in stock, welcome to take samples for testing.
Shenzhen Shunhai Technology Co., Ltd. is a professional fuse, patch fuse, recoverable fuse, self-recovery fuse, ELLON resistor, patch resistor, integrated inductor, TVS, ESD, PPTC, GDT, TSS, MOS, LDO and other protective devices. The electrostatic tube agency brands are Huade, Saruiwei, Shuokai, Tianer, Guoju and Housheng EVER, OHMS, MURATA, TAIYO, SUNLROP, TDK, LRC, ITE, SAMSUNG, professional sales teams and massive spot stocks provide customers with better service, and welcome consultation and cooperation.
Labels: TVS, TVS tube, TVS transient suppression diode, TVS transient voltage suppression diode, surge suppression diode, lightning protection tube 
