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Brand Name : | SG |
Model Number : | SMD 230XM |
Certification : | VDE,CQC |
Price : | Negotiate |
Payment Terms : | T/T, L/C |
Supply Ability : | 50000000pcs per month |
Delivery Time : | Negotiate |
High Insulation Resistance 4.5mm*3.2mm SMD 230XM Gas Discharge Tube
For Power Supplies
SMD 230XM.pdf
Working principle of gas discharge tube
When the applied voltage increases to exceed the dielectric
strength of the gas, the gap between the two poles will break down
the discharge, and the original insulating state will be
transformed into a conductive state. residual pressure level.
The main components of the pentode discharge tube are basically the
same as those of the two-pole and three-pole discharge tubes, and
it has better discharge symmetry and is suitable for multi-line
protection. (Commonly used in the protection of communication
lines) The discharge dispersion of the two-pole discharge tube is
relatively large. When using the two-pole discharge tube, the
common-mode overvoltage may be converted into a differential-mode
overvoltage. The normal operating voltage of the system applied to
both ends of the discharge tube in the system should be lower than
the voltage to maintain the discharge, otherwise there will be a
freewheeling problem. The voltage value for sustaining glow
discharge is higher than the voltage value for sustaining arc
discharge
Selection principle
(1) The DC discharge voltage of the gas discharge tube must be
higher than the maximum voltage during normal operation of the
line, so as not to affect the normal operation of the line.
(2) The pulse discharge voltage of the gas discharge tube must be
lower than the highest instantaneous voltage value that the line
can withstand, so as to ensure that the gas discharge tube can
respond faster than the line in the event of instantaneous
overvoltage, and limit the overvoltage to a safe value in advance .
(3) The holding voltage of the gas discharge tube should be as high
as possible. Once the overvoltage disappears, the gas discharge
tube can be extinguished in time without affecting the normal
operation of the line.
(4) The ground wire should be as short as possible and thick enough
to facilitate the discharge of transient large currents.
(5) If the overvoltage lasts too long, the gas discharge tube will
generate a lot of heat. In order to prevent damage to the protected
equipment due to overheating, the gas discharge tube should be
equipped with a failure protection card device. Nowadays, some new
products of gas discharge tubes have fail-safe cards.
Features
• RoHS & HF compliant
• Size:4.5mm*3.2mm
• DC Spark-over voltage: 75~1000V
• Stable breakdown voltage.
• High insulation resistance.
• High holdover voltage.
• Large absorbing transient current capability.
• Low Capacitance
• Micro-Gap Design
Recommended Applications
• Communication equipment • CATV equipment
• Test equipment
• Data lines
• Power supplies
• Telecom SLIC protection
• Telecommunications
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