RJ45 surge protector for POE-B

Part Number 581548
  • POE++ compatible
  • Gigabit Ethernet (Cat.5E)
  • Shielded enclosure and connectors
  • 2 kA discharge capability
  • UL497B certified
  • IEC 61643-21, EN 61643-21 compliance

The MJ8-POE is designed to protect sensitive data-processing equipment connected to a POE (Power over Ethernet) network from transient overvoltages. The MJ8-POE surge protector is deployed in signal network applications with data transmission speeds of 100 and 1000 Mbps. The surge protector is housed in a shielded enclosure with high quality RJ45 shielded jacks. The transient protection circuit is based on high energy gas discharge tubes (GDT) and a network of fast response silicon avalanche diodes (SAD) to achieve sharp clamping of very large surge events.

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POE-B and Gigabit Ethernet, High POE
Nominal line voltage
Un 5 Vdc/48 Vdc
Max. DC operating voltage
Uc 7.5 Vdc ( - 60 Vdc (
Max. frequency
f max. 250 MHz
Max. data rate
10/100/1000 Mbps
Insertion loss
< 1 dB
Protection level
Following the test category C3 (IEC61643-21) - Line/Line
Up 20/70 V
Impulse current
2 x 10/350µs Test - D1 Category
Iimp 500 A
Nominal Discharge Current, X-C (Line/Earth)
8/20µs Test x 10 - C2 Category
In L/PE 2000 A
GDT+Clamping diode
SPD configuration
8 wires+shielded
Connection to Network
RJ45 shielded connectors Female input/output
Metallic box with connectors input/output
Mounting flange,Screw lug, DIN Rail
Accessory(s) provided
DIN rail adapter, screw, screw nut, earthing plate, countersunk screw, cable shoe
Housing material
Operating temperature
Tu -40/+85°C
Protection rating
Failsafe mode
Short-circuit - transmision cut-off
See diagram
0.115 kg
Standards compliance
IEC 61643-21 / EN 61643-21 / UL497 B / IEEE 802-3ab/3at
UL 497B