Surge Arresters (Разрядники) []

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====== Surge Arresters (Разрядники) ======
===== Manufacturers =====
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filter  : tags_tags~~surge-arrester
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| RUICHI | |
| CITEL | http://www.tecnorayos.com/pdf/3.CAPSULAS%20GASEOSAS%20CITEL.pdf |
| DEHN  |  |
| LEUTRON  |  |
| OBO Bettermann  |  |
| RST  |  |
| ГРОЗОЩИТ  |  |
| ДКС  |  |
| Тахион  |  |
| KLS | |
| ZF | |

https://skomplekt.com/tovar/6/27/12/

https://www.symmetron.ru/catalog/passivnye-komponenty/razryadniki/


===== Theory =====
The main electrical characteristics defining a gas discharge tube are:
  * DC sparkover voltage (Volts)
  * Impulse sparkover voltage (Volts)
  * Discharge current capacity (kA)
  * Insulation resistance (Gohms)
  * Capacitance (pF)

{{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-inside-3pin.jpg?320}}

==== DC sparkover voltage ====
This is the main characteristic defining the gas discharge tube.
It is the voltage at which breakdown will occur between the
electrodes when a slowly increasing voltage (dV/dt = 100 V/s) is
applied to the component; it depends on the electrode spacing, the
pressure, and the properties of the gas mixture and of the emissive
substance.

Range of DC sparkover voltages available:
  * minimum 75V
  * average 230V
  * high voltage 500V
  * very high voltage 1000 to 3000V

The tolerance on the breakdown voltage is generally ± 20%.


==== 3-electrode configuration ====
Protecting a two-wire line (for example a telephone pair) with two 2-
electrode gas discharge tubes (connected between the wires and
ground) may cause the following problem:

The line is subjected to an overvoltage in common mode; because of
the dispersion of the sparkover voltages (± 20%), one of the gas
discharge tubes sparks over a very short time before the other (a
few microseconds); the wire that has sparked over is therefore
grounded (neglecting the arc voltages), turning the common-mode
overvoltage into a differential-mode overvoltage, very dangerous for
the terminal equipment. This risk disappears when the second gas
discharge tube arcs over (a few microseconds later).

3-electrode geometry eliminates this drawback: the sparkover of one
pole causes a "general" breakdown of the device almost
instantaneously (a few nanoseconds) because there is only one gasfilled enclosure.


==== End of life ====
Gas discharge tubes are designed to withstand several impulses
without destruction or loss of the initial characteristics (typical
impulse tests: 10 times 5kA impulses of each polarity).

On the other hand, a sustained strong current (e.g. 10A rms for 15
seconds, simulating the fall of a power line onto a
telecommunications line) will put the device out of service definitively.

If a fail-safe end of life is desired (i.e. a short-circuit that will report
the fault to the user when the line fault is detected), gas discharge
tubes with the fail-safe feature (external short-circuit) should be
chosen.
  

===== Radial - TH =====
==== 2-PIN ====
{{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-radial-th.jpg?320}} 

[[https://www.tdk-electronics.tdk.com/download/531256/80440536d8bce5a6480d734d037cc4d6/pdfmounting.pdf|Mounting]]

==== 3-PIN ====
{{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-radial-th-3pin.jpg?320}}

===== SMD =====
==== 2-PIN ====
{{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-radial-smd.jpg?320}}

{{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-disk-smd.jpg?320}} 

{{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-brick-2pin.jpg?320}} 

| Bourns | 2051-09-SM-RPLF |                 | (4.5x3.2x2.7mm 90V +30% 2kA/2A), SMD 2.7x3.2x4.5mm 90V +30% 2kA/2A. |
| Epcos  | M50-C90XSMD     | B88069X1640T902 | (5.4x5mm 90V +20% 10kA/5A 2-х элек. SMD M50-C90XSMD), 5.4x5mm 90V +20% 10kA/5A 2-х элек. SMD |


==== 3-PIN ====
| {{:wiki:cmp:circuit_protection:surge_arresters:surge-arrester-radial-smd-3pin.jpg?320 }} | 


===== Cable\Connector =====
https://www.panorama-antennas.com/site/Antenna-Accessories/Surge-Arresters?product_id=380


===== Disk - TH + varistor =====
| {{:wiki:cmp:circuit_protection:surge_arresters:varistor-surge-arrester-disk-th.jpg?320}} |
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