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Paperless Datasheet
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Model & Ordering Code

Model Ordering Code UPC/EAN Code
WTH-SG/RJ45-KG US121104 (0) 811914030027
Internal View

Certificates of Products - Page 01 - Back to TOP -

How to Name Ethernet PoE Series

UL file number: E346881
Data protectors, for indoor use, Model(s) WTH-SG/RJ45+
Data protectors, for outdoor use, Model(s) WTH-SG/RJ45-KE+, WTH-SG/RJ45-KG+
Data protectors, for rack mount use, Model(s) WTH-SG/RJ45-KH+/n (n=number of ports)

+ - May be followed by -A, -B, -C, -D, -E, -F, -G, -H, -I, -J, -K, -L, -M, -N or -O. - Page 02 - Back to TOP -

WTH­-SG/RJ45 Series surge protective devices are applied to surge protection for data communication systems.
WTH-SG/RJ45-KG is connected in series in CAT6 network cables, compatible with 10/100/1000/10000 (10G) Base-T Ethernet systems, protecting the equipment which are connected to the network (e.g. computers, routers, PoE devices, etc.) against damages by over-voltage surge.
(Standards compliance: IEC61643­-11, UL497B, IEEE 802.3af PoE/802.3 at PoE Plus)
WTH-SG/RJ45-KG Technical Data
Nominal operating voltage (Un) 2.8V(Ethernet)/48V(PoE)
Max. continuous operating voltage (UC) 3V(Ethernet)/60V(PoE)
Nominal Discharge Current (In @8/20μs) 3kA (line to line)
Max. Discharge Current (Imax @8/20μs) 20kA (line to GND/PE)
Voltage protection level (Up @line-line) 50V @ 3kV (1.2/50)
Voltage protection level (Up @line-GND/PE) 700/800V @ 3kV (1.2/50)
Max Watt 90W (PoE)
Data Rate 100/1000Mbps
Bandwidth (3db) per pair >250MHz
Insertion Loss <0.5dB @100MHz
Pairs Protected 1-2,3-6,4-5,7-8
Protective Element GDT, TVS
Voltage Breakdown Range, Vdc @ 100 V/s 2.4-188 (L-L) / 72-108(L-G)
Impulse Voltage Range,Vdc @ 100 V/µs <1000
Response Time (tA) <100ns (line-GND/PE), <1ns (line-line)
Connection mode RJ45
Temperature Range - 40° to 176°F (-40° to 80°C)
Relative Humidity 0% to 95% noncondensing
Maximum Operating Altitude 10,000 feet (3000m)
Cross-sectional area of earth lead 3mm² multistranded / flexible
Stripping Length Contacts 1/4 inches (6-7mm)
Terminal Screw Torque Max. 0.25Nm
Protection Rating (IP Code) IP 66
Surge Life at 0.5kA (8/20μs) >2000 events
Housing Material Thermoplastic, UL94 V-0, f1
Net Weight Per Unit 0.36Lb (163g)
Product Dimension (W×D×H) 4.9"×3.5"x2.0" (122mm×89×50mm) - Page 03 - Back to TOP -

Main Features
1. Waterproof enclosure design
2. Waterproof terminal threading, suitable for indoor or outdoor applications
3. UL certified f1 anti-acid rain and anti-ultraviolet enclosure material, ensuring the aging resistance of shell for outdoor use
4. Copper insert stud, damage free after repeatedly disassembly, more stable installation
5. Dual-grounding mode, boosting to 90V leakage voltage whenever grounding voltage is disturbed

Surge Protection Connection Diagram


Installation Instruction
The surge protective devices shall be employed in a Listed enclosure or closet that is only accessible to technicians or service personnels. - Page 04 - Back to TOP -

Application - Page 05 - Back to TOP -

FAQ & Help (1/2)
1. What should I do if I can't find the paper manual in the product packaging?
Watchful Eye products is committed to going green with paperless data sheets. On the left side of each product enclosure is an engraved link with URL for downloading paperless data sheet and QR code of the website. If you need the paper data sheet, you can open the link and print the data sheet by yourself.

2. Model WTH-SG/RJ45-KG has no LED status indicator. What instruments can be used to test whether its surge protection function is normal or not?
Test with a Watchful Eye surge protector tester.
If a system failure occurs, first remove the surge protector and restore the system to the wiring status without the surge protector. If the system failure is resolved, it shows the surge protector is faulty. Using Watchful Eye Surge Protective Tester can more easily test whether the WTH-SG/RJ45-KG is normal or not.

3. Can you list more applications of WTH-SG/RJ45-KG?
Ethernet & PoE equipment such as network switches, routers, computers, servers, video cameras, etc.

4. What are the advantages of the GDT+TVS type surge protection?
It provides a two-step surge protection mode: the first-stage GDT protection, releasing strong surge intrusion and reduce the strength of the surge; it is followed up the second-stage TVS fine protection, achieving a lower residual voltage value.

5. If the wires on the line side and the equipment side are connected reversely, will it affect surge protection?
When the wire is connected reversely, TVS becomes pre-stage protection, and GDT is post-stage protection. The nominal discharge current of TVS protection will be much lower than GDT. If it encounters a surge intrusion, it may cause damage to the TVS. The second-stage GDT protection will also play a role in surge protection, but the residual voltage value will increase, which is a risk to the protected equipment.

6. What are the advantages of 1-2, 3-6, 4-5, 7-8 line full protection mode of GDT+TVS type surge protection?
If you don't know whether the system is 100M or 1000M, which PoE structure or wiring mode the system is, the full line surge protection mode of GDT+TVS avoids the confusion of your selection.

7. The PE/GND of WTH-SG/RJ45-KG has two terminals, what's the use of a GDT connected in series between the two terminals?
The PE/GND of WTH-SG/RJ45-KG has two terminals. There is an additional 90V GDT connected in series between the two terminals. First, connect the grounding to the right terminal of PE/GND. If signal is unstable, you can change the grounding to the left terminal, the voltage-to-ground will increase by additional 90V, greatly reducing the possibility of being interfered. - Page 06 - Back to TOP -

FAQ & Help (2/2)
8. What is the role of GDT connected in series between 5-8 lines?
4-5 and 7-8 PoE lines, on the basis of common mode (line-ground) surge protection, add additional differential mode (line-line) surge protection, providing more refined protection.

9. How do I determine the quantity of surge protector that I need for protecting the equipment?
Surge on the STP cable will be transmitted in two directions to the ends of the cable. The surge protector A protects the equipment on the A side, such as an ethernet switch, etc. And Surge protector B protects the equipment on the B side. such as an ethernet equipment. If only the device on one end of cable needs to be protected, then only one surge protector is needed.

10. What is UL f1 standard for housing materials?
UL f1 standard requires housing materials be UV and acid rain resistant and can be used in outdoor environments

11. What is the material of the cable seal of the cable glands?
The material of the cable seal is NBR?

12. What's the outer diameter of a cable which can pass through the cable glands?
3 to 6.5mm - Page 07 - Back to TOP -

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