70V - 5000V Glass Discharge Tube SMD Structure Sample Available
Brand Name:SG
Certification:VDE , CQC
Model Number:SX5 0 - 230X SMDT
Minimum Order Quantity:Negotiate
Delivery Time:Negotiate
Payment Terms:T/T, L/C
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Location:
Dongguan Guangdong China
Address:
Baisha Sancun Industrial Zone, Humen Town, Dongguan City, Guangdong Province, China
Supplier`s last login times:
within 28 hours
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Product Details
Low Capacitance Gas Discharge Tubes - SX5 Series RoHS & HF
Compliant
SX5 0 - 230X SMDT.pdf
Structure
Some gas discharge tubes use glass as the encapsulation shell of
the tube. Some also use ceramics as the package shell, and the
discharge tube is filled with an inert gas with stable electrical
properties (such as argon and neon gas, etc.). The discharge
electrodes of the commonly used discharge tube are generally two or
three, and the electrodes are separated by an inert gas. .
According to the setting of the number of electrodes, the discharge
tube can be divided into two-pole and three-pole discharge tubes.
The ceramic diode discharge tube is composed of pure iron
electrode, nickel-chromium-cobalt alloy cap, silver-copper welding
cap and ceramic tube body and other main components. The discharge
electrodes in the tube are coated with radioactive oxides, and the
inner wall of the tube is also coated with radioactive elements to
improve the discharge characteristics. The discharge electrode
mainly has two structures: rod-shaped and cup-shaped. In the
discharge tube of the rod-shaped electrode, a cylindrical heat
shield is installed between the electrode and the wall of the tube
body. The heat screen can make the ceramic tube body heat tend to
Uniform, so that there will be no local overheating and cause the
tube to break. The inside of the heat shield is also coated with
radioactive oxides to further reduce discharge dispersion. In the
discharge tube of the cup-shaped electrode, molybdenum mesh is
installed at the mouth of the cup, and cesium element is installed
in the cup, which also reduces the dispersion of discharge.
The three-electrode discharge tube is also composed of pure iron
electrodes, nickel-chromium-cobalt alloy caps, silver-copper
welding caps, and ceramic tubes. Different from the diode discharge
tube, a nickel-chromium-cobalt alloy cylinder is added to the
three-electrode discharge tube as the third pole, that is, the
ground electrode.
Principle
The working principle of the discharge tube is gas gap discharge. When a certain voltage is applied between the two poles of the discharge tube, an uneven electric field is generated between the electrodes: under the action of this electric field, the gas in the tube begins to dissociate. When the applied voltage increases to make the gap between the electrodes When the field strength exceeds the dielectric strength of the gas, the gap between the two poles will be broken down by the discharge, and the original insulating state will be transformed into a conductive state. After the conduction, the voltage between the two poles of the discharge tube will remain at the residual voltage level determined by the discharge arc. , this residual voltage is generally very low, so that the electronic equipment connected in parallel with the discharge tube is protected from overvoltage damage
Features
1. RoHS & HF compliant
2. SMD Structure
3. DC Spark-over voltage: 70~5000V 4. Low Capacitance
5. Agency Recognition : UL
6. Operating temperature:-30°C ~ +85°C Storage
temperature:-40°C ~ +115°C
Warehouse Storage Conditions of Products
· Storage Conditions:
1. Storage Temperature: -10°C~+40°C
2. Relative Humidity:≤75%RH
3. Keep away from corrosive atmosphere and sunlight. · Period of
Storage: 1 year
Recommended Applications
1. Cable Modem
2. xDSL
3. Set-Top Box
4. TV sets
5. Power supplier
6. Consumer electronics
FAQ
Q1. Can I have a sample order ?
A: Yes, we welcome sample order to test and check quality. Mixed
samples are acceptable.
Q2. What about the lead time?
A:Sample needs 1 days, mass production time needs 1-2 weeks for
order quantity more than
Q3. Do you have any MOQ ?
A: MOQ depend on the type of product, 1pc for sample checking is
available
70V - 5000V Glass Discharge Tube SMD Structure Sample Available
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