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Measuring & Controlling System SPD

Thunder Protector RS485/RS422 5V 10kA 0-20mA or 4-20mA 4 Single Lines Lightning Arrester

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Looking for a lightning protector that can effectively shield your sensitive electronic equipment from dangerous electrical surges? Look no further than the Thunder Protector RS485/RS422 5V 10kA 0-20mA or 4-20mA 4 Single Lines Lightning Arrester from Telebahn. This versatile lightning arrester is specially designed to protect 4 single lines and can handle up to 10kA of surge current, making it an ideal choice for a wide range of industrial and commercial applications.

The right solution for protecting your valuable gear from lightning hits and other electrostatic activities featuring its rugged construction and easy-to-use design. This lightning protector gets the energy and reliability you will need to keep your equipment safe and secure whether you are coping with delicate information transmission cables, or high-voltage power lines.

Having a 0-20mA or 4-20mA range that is present that is well-suited for a wide range of applications. This lightning arrester has everything you need to protect your equipment and keep your operation running well whether you're working in a factory setting, building a data center, or monitoring complex industrial equipment.

But that isn't all - also incredibly very easy to install. Merely connect the lightning arrester in the middle of your equipment therefore the charged energy supply, and you're done This lightning protector could be the perfect option for any industrial or commercial application with its compact size and durable constructions.

Don't wait - order your Thunder Protector RS485/RS422 5V 10kA 0-20mA or 4-20mA 4 Single Lines Lightning Arrester today from Telebahn.

Product Description

Image_BS RS485 5_4M.jpgPhoto_BS RS485 5_4M.jpg


BS RS485 5/4M is installed at LPZ 0B-2 higher,or directly at the upstream near the protected devices. Provide protection for RS485/RS422 industrial bus control, other field bus and temperature measurement. Designed according to IEC 61643-21; EN61643-21; GB/T 18802.21.


Highlight Features

Composed by two parts: the base and the protection module.

The signal will not be disconnected when replacing the module.

High discharge capacity, low voltage protection level.

Minimum space requirements, two paris line over a width of 12mm(2/3 modules).



BS RS485 5/4M is mainly used in lightning protection for measuring and controlling system.

for DIN rail mounted, such as the field bus system, emergency alarm systems, or telecommunication system.


Application Environment


Relative humidity:≤95%(25°C)

Technical data



BS RS485 5/4M

Rated voltage [UN] 


Reted voltage d.c/a.c.(max.continous voltage)


Nominal current


Lightning discharge current(10/350)


Nominal discharge current(8/20)


Voltage protection level at (line-line/line-PG)

≤ 20V

        ≤ 700V      

Voltage protection level at 1kV

≤ 8.5V




Series impedance per line




Operating temperature range [Tu]


Response time(line-line)



Mounting on

35mm DIN rail

Enclosure material

blue thermoplastic, UL94-V0

Cross-sectional area

0.08mm²-4mm²/2.5mm² flexible

lTest standards

IEC 61643-21; EN 61643-21; GB/T 18802.21



Art.-No.                                620361
Packing unit                                         1pc(s)


Installation Diagram

 1.This product is connected in series to the protected device.

 2.Mount the SPD on the 35 mm DIN rail.

3.The (1/3, 2/4) 4-lines for input terminal ;the (5/7,6/8) 4-lines for output terminal should be connected to the protected devices.

4.A pair of 1/3 & 2/4 input terminal for RS485; and input terminal 1/3, 2/4 for RS422.

5.SPD to be safely earthed via the DIN rail; earth lead must be connected to the earthing system, ideally using 6mm² cable. The cable should be as short as possible.

6. After above, you should ensure the circuit is functing.

Regulary inspect the operating status, especially after lightning. Once the communication is off, electrician should check/ replace the SPD.

BS RS485 5 4M.png






Q1: Are you a factory or a trade company?

A: We are the factory of surge protective devices and we have been doing this for over 30 years.

Q2: Where are your products distributed?

A: Our products are distributed all over the world, Main market are Europe, North America, the United Arab Emirates, Africa and so on.

Q3: Can I have a sample?

A: Yes, but according to our company's policy, we provided free samples, while you should pay the freight fee; the sample can be delivered by TNT/DHL/UPS/FEDEX.

Q4: Which port is the nearest from you?

A: Guangzhou port or Shenzhen Port or Hong Kong port or Zhuhai Port.

Q5: What's your lead time?

A: Sample lead time: 3~5 working days.

Mass production: usually 10~30days.

For big orders, honestly, it depends on the order quantity and designs.

Q6: When can I get the price?

A: We usually quote within 24 hours after we get your inquiry. If you are very urgent to get the price, please call us or tell us in your email so that we will regard your inquiry as priority.

Q7: Can you do the design for us?

A: Yes, we have a professional team having rich experience in molding design, electrical system developing and manufacturing. Please just tell us your ideas and we will help you to carry out your ideas into a perfect artwork. You can pay for the molding fee and own the mold by yourself or we can cooperate on the molding.

Q8: OEM & ODM are accepted or not?

A: OEM&ODM are welcome.

Q9: Who are we?

A:We are based in Guangdong, China, start from 2016,sell to Domestic Market(38.00%), North America(23.00%),Eastern Europe(15.00%),Southeast Asia(8.00%),South America(6.00%),Central America(2.00%),NorthernEurope(2.00%),SouthAsia(2.00%),Africa(00.00%),Eastern Asia(00.00%),Western Europe(00.00%),Southern Europe(00.00%). There are total about 11-50 people in our office.

Q10: How can we guarantee quality?

A:Always a pre-production sample before mass production.

Always final Inspection before shipment.

Q11: What can you buy from us?

A:Surge Protective Devices, Lightning Protector.

Q12: Why should you buy from us not from other suppliers?

A:Zhuhai Telehof Electrics Company Limited is a British-owned company, mainly engaged in research, manufacturing and sales of Surge Protective Devices.