Ethernet port (RJ45) "Best" surge protection solution

　　Super Series for Network (SHN)/Chip Surge Protection Device

　　Why does the network interface (RJ45) need lightning protection design?

　　Today, with the rapid development of information technology, network applications are becoming more and more common indoors and outdoors. However, the probability of receiving lightning strikes on the corresponding Ethernet ports is also much higher. In the standard RJ45 interface, the protected lines include 4-core line protection (1,2,3,6) and 8-core line full protection (1,2,3,6,4,5,7,8) to prevent lightning waves along the line. If a circuit invades the front-end equipment, appropriate overvoltage protection devices should be installed on each line in front of the equipment.

　　What is CSPD?

　　CSPD (Chip Surge Protection Device) is a patch-packaged surge voltage protection device. Nanjing Huaju Electronics Co., Ltd. has developed an ultra-high-performance overvoltage suppression device using professional powdering and production technology (with various multinational inventions) To protect electrical equipment, we have specially developed the SCSPD series of multi-function surge protectors for RJ45 network Ethernet ports, which use the connection method of the middle tap of the network transformer to suppress surge voltage. SCSPD itself has a large capacitance that can provide better filtering effect on EMI noise. At the same time, SCSPD provides "ultra-small size SMD chip" packaging, and has "extremely low suppression voltage" and "fast response speed". Compared with the current The use of discharge tubes (GDT) on the market has always had the "disadvantages" of "high suppression voltage" and "slow response speed". SHN's excellent electrical properties can avoid these shortcomings and can withstand 10x700 μs / 6KV multiple times. surge voltage impact

　　Ethernet port lightning protection design requirements: Meet European CE certification, American FCC certification and Japanese VCCI certification requirements. At the same time, the Ethernet port lightning protection requirements meet domestic requirements; specifically implement the following standards: EN55022, EN55024, FCC PART 15, ETSI EN300 386, EN60950, UL60950, etc. Focus on the design: Due to the high interface speed, the port filter design and PCB design are the design focus of this product. In addition, the selection control of key components is strengthened to ensure that the components meet the EMC safety requirements of the entire machine.

　　3. Model name, appearance structure and dimensions:

　　Advantages of SCSPD:

　　1. SMD package (1206 & 1210)

　　2. The working voltage is specially designed for the network port

　　3. Inhibit voltage lower than (25V)

　　4. Extremely low leakage current (< 1 μA)

　　5. The response speed is faster than the discharge tube (GDT) (< 1 ns)

　　6. High nonlinearity index α reaches (above 25)

　　7. Passed (10x700 μs/ 40 ohm) surge voltage 6KV test

　　8. Good impact ability more than 30 times

　　9. Comply with RoHS requirements and lead-free solder furnace process

　　10. Non-polar two-way action

　　11.Extremely wide operating temperature (-55°C ~ + 125°C)

　　12. When applied to power supply end protection, it can avoid the problem of discharge tube flameout and follow-up flow.

　　13. Space saving and competitive price

Recommended application part number:

Comparison between SCSPD and discharge tube (GTD)

Main manufacturer specifications:

Sinochip Chip Surge Protection Device (SCSPD)

Application Note for RJ45 Connector

Ethernet port (RJ45) lightning protection recommended material number

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