Ethernet interface electrostatic protection and lightning protection scheme
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By LEIDITECH | 28 June 2024 | 0 Comments

Ethernet interface electrostatic protection and lightning protection scheme

Ethernet interface is the cornerstone of modern network communication，It followsIEEE 802.3 Standards，Allow various devices to pass through physical media，Like twisted pair or fiber optic cable，Conduct data exchange。This interface typically usesRJ45connector，Support from 10BASE-TTo 1000BASE-TDifferent speed standards for，From 10MbpsTo 10GbpsTransmission rate of。The key components of the Ethernet interface include the physical layer（PHY），Responsible for sending and receiving signals，And media access control layer（MAC），Encapsulation and unblocking of processing data frames、Address Resolution，And media access control。These functions together ensure accurate and error free data transmission in the network。
Power over Ethernet（POE）It is another innovative network technology，It transmits power and data simultaneously through Ethernet cables，byIPtelephone、Wireless access point、Network cameras and other devices provide power，No additional power sockets required。POEUtilizing standardCat5e、Cat6 or higher levelUTPcable，Power transmission through idle or data cable pairs in the cable，Simplified device installation，Reduced costs，Especially in locations where it is difficult to access power sockets。
however，These key interfaces and systems also face electrostatic discharge（ESD）Potential threats from lightning strikes，The power of these two natural phenomena is sufficient to cause serious damage to network devices，Thereby affecting the stability and reliability of the entire system。
In order to effectively resistESDChallenges brought by lightning，Shanghai Leimao provides customers with a series of protection strategies。Here is Lei Mao's discussion on Ethernet interfaces andPOEBrief description of the power supply interface scheme：
2.10 Gigabit EthernetGInterface electrostatic protection scheme
Advantages of the plan：Used for static electricity protection at indoor network ports，Lei Mao adoptsULC0542T4 differential mode protection and 8 high-speed data cables。 Ultra small package integrated device protection，DFN1610-6。Capacitor 0.3PF，satisfyIEC61000-4-2，Level 4，contact Discharge 30kV，Air discharge 30kV，Can pass eye chart testing。
2.2 10 Gigabit EthernetGInterface lightning and electrostatic protection scheme
Advantages of the plan：10000 for outdoor useMNetwork port surge protection，Lei Mao adopts secondary protection,Reliable work，Ensure signal high-temperature integrity，satisfyIEC61000-4-2，Level 4，Contact discharge 30kV，Air discharge 30kV。 IEC61000-4-5 10/700μs，40Ω，6kV，±5 times。
2.3 Vertical lightning protection scheme for gigabit network
Advantages of the plan：1000 for outdoor useMNetwork port surge protection，Lei Mao adopts secondary protection,Reliable work，Ensure signal high-temperature integrity，satisfyIEC61000-4-2，Level 4，Contact discharge 30kV，Air discharge 30kV。IEC61000-4-5 10/700μs，40Ω，6kV，±5 times，This scheme does not lose packets during high-temperature transmission。
2.4 Integrated lightning protection scheme for gigabit network
Advantages of the plan：1000 for outdoor useMNetwork port surge protection，Lei Mao adopts secondary protection,Reliable work，Ensure signal high-temperature integrity，satisfyIEC61000-4-2，Level 4，Contact discharge 30kV，Air discharge 30kV。IEC61000-4-5 10/700μs，40Ω，6kV，±5 second
2.5.1 Small volume electrostatic protection scheme for gigabit network
Advantages of the plan：Used for static electricity protection at the Ethernet port，Lei Mao adopts multiple integrated devices for protection，Can ensure signal integrity，save space，satisfyIEC61000-4-2（Level 4）Contact discharge 30kV，Air discharge 30kV
2.5.2 Gigabit Network 3.3V Integrated protection scheme for low residual voltage and high current
Advantages of the plan：Characteristics of electrostatic protection：Gigabit Ethernet port electrostatic protection，Lei Mao adopts multiple integrated devices，highESDprotect，Small size，Low capacitance，Ensure signal integrity，Meet the following criteria：IEC61000-4-2(ESD)±30KV(air)，±30KV(contact)，IEC61000-4-4(EFT)40A(5/50ns)；IEC61000-4-5(Lightning)32A(8/20μs) 。
Characteristics of network transformers：Small volume , Low altitude。Turn ratio 1:1；Open circuit inductance : 350 uH ；insertion loss ： -1.1 dB Max，DC resistance 1.3Ω。
2.6 Vertical lightning protection scheme for 100Mbps network
Advantages of the plan：100 for outdoor useMNetwork port surge protection，Lei Mao adopts secondary protection,Reliable work，Ensure signal high-temperature integrity，satisfyIEC61000-4-2，Level 4，Contact discharge 30kV，Air discharge 30kV。IEC61000-4-5     10/700μs，40Ω，6kV，±5 times,Expanding the gigabit network port by 4 ports is sufficient。
2.7 Integrated lightning protection scheme for 100Mbps network
Advantages of the plan：100 for outdoor useMNetwork port surge protection，Lei Mao adopts secondary protection,Reliable work，Ensure signal high-temperature integrity，satisfyIEC61000-4-2，Level 4，Contact discharge 30kV，Air discharge 30kV。IEC61000-4-5 10/700μs，40Ω，6kV，±5 second
2.8 100 Mbps discrete electrostatic protection scheme
Advantages of the plan：100 for indoor useMStatic electricity protection at the Ethernet port，Lei Mao uses two devices for protection，Save space，Ensure signal integrity，satisfyIEC61000-4-2，Level 4，Contact discharge 30KV，Air discharge 30KV。
2.9 Integrated static electricity protection scheme for 100Mbps network
Advantages of the plan：100 for indoor useMStatic electricity protection at the Ethernet port，Lei Mao adopts single device protection,Save space， Ensure signal integrity，satisfyIEC61000-4-2，Level 4，Contact discharge 8kV，Air discharge 15kV。
2.10.1 POEOutdoor lightning protection 6KVProtection plan
Advantages of the plan：For outdoor usePOENetwork port surge protection，Lei Mao adopts secondary protection,Reliable work，Ensure signal high-temperature integrity，satisfyIEC61000-4-2，Level 4，Contact discharge 30kV，Air discharge 30kV。
IEC61000-4-5 10/700μs，40Ω，6kV，±5 times，This scheme does not lose packets during high-temperature transmission。
2.10.2 POEOutdoor 4KVLightning protection scheme
Advantages of the plan：For outdoor usePOENetwork port surge protection，Lei Mao adopts secondary protection,Reliable work，Ensure signal high-temperature integrity，satisfyIEC61000-4-2，Level 4，Contact discharge 30kV，Air discharge 30kV。
IEC61000-4-5 10/700μs，40Ω，4kV，±5 times，LMBJ58CP4 Specially designed forPOE 48V Power supply design，This scheme does not lose packets during high-temperature transmission。
2.11 POEPower supply surge protection scheme
Background of scheme application：POEThe application is becoming increasingly widespread，But the signal from the long cable，Will definitely bring the threat of induced surges，So the designed product plan must comply withIEC 61000-4-5 Standards
Advantages of the plan： Lei Mao adoptsSM15T68CA，Breakdown voltage 68V，Guarantee 48VStable power supply and appropriate fluctuations，GuaranteedPCBTransient amplitude of voltage,adoptIEC61000-4-Level 4 testing of 5 surge standards，8/20µs,42Ω，4KV,±10 times。
2.12 Vehicle Ethernet protection scheme
Advantages of the plan：Lei Mao ElectronicsProvide based on 100BASE-T1 and 1000BASE-T1 Development Technology Alliance Standards，Designed a dedicated and protective bus to protect againstESD Vehicle mounted protection scheme for damage caused by other transients。The one provided by Lei MaoESDUsing silicon-based technology，Has higher reliability，diodeCapacitance value 3PF.Ensure signal integrity。
Lei Mao has a detailed plan and wiring diagram，And recommended model parameters。Please contact Lei MaoEMCLittle brother requests it。
Lei Mao mainly provides anti-static measuresTVS/ESDAnd relatedEMCcomponent（Discharge tubeTSS/GDT、Stabilizing tubeZENER、VaristorMOV、Rectifier diodeRECTIFIER、Self recovery fusePPTC、Field-effect transistorMOSFET、inductance）。
Surrounded by Lei MaoEMCEMC service customers，Self built free laboratory for testing static electricity for customersESD（30KV）、Group pulseEFT(4KV)、surge（8/20，10/700 10/1000）、Car load shedding（7637 5a/5b）Performance testing of components, etc。LeiditechKeeping up with the pulse of domestic and international technological updates，Continuously innovatingEMCProtection scheme and related devices，Target direction is small packaging，High power，Provide reliable solutions and components for domestic substitution。

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