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Two compact RJ45 inline surge protectors side by side

BFKK

BFKK Ethernet Surge Protector 2-pack 100/1000Mbps 8-line protection

SKU CH-MAC9-7PDH5

Two inline protectors shield CAT6 Ethernet gear from surges on all eight conductors at 100/1000Mbps

  • Protects 100/1000Mbps networks from surge damage
  • Two-stage GDT+TVS design lowers residual voltage to 45V
  • Shields all eight conductors across pairs 1-2,3-6,4-5,7-8
  • Meets IEC 61000-4-5 with 0.3kA discharge per line
  • Bandwidth exceeds 250MHz per pair for CAT6 performance

Surge protector for CAT6 networks

The BFKK Ethernet Surge Protector installs inline on a CAT6 cable to shield connected devices from over‑voltage transients. It suits 10/100/1000M Base‑T Ethernet systems and meets IEC 61000‑4‑5 requirements. The two‑pack covers both ends of a link, protecting equipment such as computers, routers and PoE devices. Each unit handles data rates of 100/1000Mbps with bandwidth above 250MHz per pair.

Inline installation with full pair coverage

The device plugs directly into the network run and requires no external power or configuration. It protects all eight conductors across pairs 1‑2, 3‑6, 4‑5 and 7‑8, so the same unit works whether the link negotiates at 100M or 1000M. This full‑line approach removes the need to match the protector to a specific Ethernet speed. The GDT plus TVS topology absorbs the initial surge energy then clamps the residual voltage to a lower level.

Two‑stage clamping under sustained transients

The first‑stage gas discharge tube diverts high‑energy surge current, reducing its magnitude before the second‑stage TVS diodes clamp the remaining voltage. Total discharge current is rated at 0.3kA per line to ground, and the voltage protection level is 45V at 0.3kV 8/20µs waveform. This sequential action limits let‑through voltage during prolonged or repeated surge events rather than only during a single short pulse.

Highlights

  • Protects 100/1000Mbps networks from surge damage
  • Two-stage GDT+TVS design lowers residual voltage to 45V
  • Shields all eight conductors across pairs 1-2,3-6,4-5,7-8
  • Meets IEC 61000-4-5 with 0.3kA discharge per line
  • Bandwidth exceeds 250MHz per pair for CAT6 performance

Specifications

No published specifications for this item yet.

Questions about this item

What continuous data rate does the protector sustain without degrading the 100/1000Mbps link?

The unit is rated for 100/1000Mbps Ethernet and maintains >250MHz bandwidth per pair, so full gigabit throughput is preserved under sustained load.

How much heat or noise does the device add when it is passing traffic all day?

It is a passive in-line component with no fan or active circuitry, so it generates no audible noise and negligible heat during continuous operation.

What existing cabling and grounding must be in place for the protector to function?

You need a CAT6 or compatible shielded twisted-pair run with an accessible ground connection for the surge current to divert to earth.

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