Original title: ceramic gas discharge tube _ ceramic discharge tube _ gas discharge tube
Ceramic gas discharge tube is also called ceramic discharge tube and gas discharge tube; English name: Gas Discharge Tubes；; Abbreviation: GDT. GDT ceramic gas discharge tube is a kind of switch-type protection device, which is a closed device consisting of one or more discharge gaps filled with inert gas. The electrical performance of GDT depends on gas type, gas pressure, internal electrode structure, manufacturing process and other factors. When the voltage applied to the two electrode terminals breaks down the gas in GDT, it starts to discharge, which changes from high impedance to low impedance, so that the surge voltage is quickly short-circuited to near zero voltage, and the overcurrent is released to the ground, thus protecting the subsequent circuit.
GDT ceramic gas discharge tube can withstand tens or even hundreds of thousands of amperes of surge current, and has extremely low junction capacitance. It is used to protect electronic equipment and people from the hazards of transient high voltage, and is the most widely used switching component in lightning protection equipment. The surge current of ceramic gas discharge tube can reach 20KA, 40KA, 50KA, 60KA, 100KA, 150KA and even higher. The insulation resistance can reach 10G；; The interelectrode capacitance is as low as 1 pf; Its main purpose is lightning protection of electrical equipment. When electrical equipment is struck by lightning, the discharge tube can discharge quickly to protect the lightning. Widely used for lightning protection in communication lines, security units of communication distribution frames and high-frequency circuits.
Shenzhen Shunhai Technology Co., Ltd. is the authorized first-class agent dealer of "Shuokai" GDT ceramic gas discharge tube, specializing in the full range of specifications of GDT ceramic gas discharge tube protection devices. The models of GDT ceramic gas discharge tube protection devices can be elected from SC1206, SC1210, SC1812, SC2E5-SMD, SC2E5, SC2E6-SMD, SC2E8, SC2E8/2H8, SC3E5, SC3E6, SC3E8, SC2K8 and other series models. Surge current can be elected from 0.5 ka to 150 ka or even higher. If you need GDT ceramic gas discharge tube switch protection device products, please leave a message or call: 0755-28100016; Genuine guarantee, sample application, small quantity quick purchase, professional FAE support, customization, supply chain guarantee, R&D selection, technical question and answer. Our company has been focusing on GDT ceramic gas discharge tubes for more than 20 years, which is your trustworthy enterprise. Then Xiaobian today mainly introduces the selection parameters of one of SC1206 series GDT of "Shuokai" as follows.
SC1206 series GDT ceramic gas discharge tube size diagram is as follows
SC1206 series GDT ceramic gas discharge tube model parameter selection chart is as follows
Characteristics of GDT ceramic gas discharge tube
Lightning arrester can provide extremely fast response speed from slow surge of 100V/s to high-speed surge of 10kV/μs;
Provide stable breakdown voltage;
The characteristics of high insulation resistance and high insulation resistance make the arrester respond well at high temperature and high humidity;
Low capacitance characteristic, which can reduce interference or reduce transmission loss in high frequency operation environment;
Higher than the holding voltage, it can quickly restore the high impedance state to ensure the safety under continuous operation;
No ride-through voltage, no transverse voltage in multipole arrester;
Long service life, with a service life exceeding 10 years under general conditions;
Sealed and corrosion-resistant lightning arresters, strong and completely sealed lightning arresters can avoid leakage and provide better protection against vibration. This product is light in appearance and more flexible in application.
The circuit design is simple and has no influence on the original circuit.
Advantage of GDT ceramic gas discharge tube
Great insulation resistance, small parasitic capacitance and strong surge protection capability;
Before breakdown (conduction), it is equivalent to open circuit, with large resistance, no leakage current or small leakage current;
After breakdown (conduction), it is equivalent to short circuit, which can pass a large current and has a small voltage drop;
The pulse current capacity (peak current) is very large; 2.5kA~100kA；
Has bidirectional symmetry characteristics;
The capacitance value is very small, less than 3pF；;
Disadvantages of GDT ceramic gas discharge tube
Because the discharge delay (that is, the response time) is large, the action sensitivity is not ideal, and some models will appear freewheeling phenomenon, which will lead to failure for a long time, and it is difficult to effectively suppress lightning waves with large steepness of wave head rise;
Because gas ionization takes a certain time, the response speed is slow, the reaction time is generally 0.2 ~ 0.3 μ s (200 ~ 300 ns), and the fastest time is about 0.1μs(100ns). Before it is turned on, a sharp pulse with a large amplitude will leak past, which can not protect it.
The breakdown voltage has poor consistency and large dispersion, which is generally 20%;
The breakdown voltage has only a few specific values.
The application of GDT ceramic gas discharge tube
GDT ceramic gas discharge tubes are widely used in signal protection, lightning protection of AC power supply, overvoltage protection of outdoor distribution box, first-class signal protection, communication equipment, switching power supply, high power of air conditioner and so on.
The above contents mainly introduce the brief introduction of GDT ceramic gas discharge tube, the dimension drawing of SC1206GDT ceramic gas discharge tube, the parameter selection of SC1206GDT ceramic gas discharge tube, the characteristics, advantages and disadvantages and application of GDT ceramic gas discharge tube. If you need the protection device of GDT ceramic gas discharge tube, please leave a message or dial 0755-28100016; Massive GDT ceramic gas discharge tubes are in stock. Please 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: ceramic gas discharge tube, ceramic discharge tube, gas discharge tube, GDT ceramic gas discharge tube, GDT ceramic discharge tube, GDT gas discharge tube 
