KSB LJ8 Series — Surge Suppression Device

DynaShield® KSB LJ8 Surge Suppression

The KSB LJ8 Series is a Surge Protection Device family designed to protect single RJ-45 connector for 10 BT/100 BT/1000 BT data signals with transmission rates up to 1000 Mbps

  • 1000 Mbps transmission rate
  • DIN rail or inline mounting
  • Hybrid silicon + GDT design
  • Shielded RJ45 jacks
  • Fast response
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DynaShield Applications

ALLTEC’s Protection Pyramid depends on DynaShield® products to support its comprehensive facility framework. The second tier of protection diminishes the significance of random high-energy, short-duration electrical power transients through properly installed surge protective devices. These occurrences are typically caused by atmospheric phenomena (such as lightning strikes), utility switching, inductive loads, and internally generated overvoltages. You can view typical installation locations in the application maps to the right by locating the numbers 5 and 6.

Model KSB LJ8-5 KSB LJ8-12 KSB LJ8-24 KSB LJ8-48
Certification IEC 61643:21-2005
Number of Ports 2
Technology Hybrid Silicon Diode & Gas Discharge Tube
Nominal Voltage UN 5 V 12 V 24 V 48 V
Maximum Continuous Operating Voltage UC 6 V (5 V~) 15 V (12 V~) 28 V (24 V~) 60 V (48 V~)
Nominal Current 1 A
C2 Nominal Discharge Current IN (8 x 20 μs) per line 100 A (L-L), 2.5 kA (L-G)
C2 Total Nominal Discharge Current
Imax (8 x 20 μs)
400 A (L-L), 20 kA (L-G)
Voltage Protection Rating C2
UP @ C2 (8 x 20 μs)
(L-L) ≤ 30 ≤ 45 ≤ 55 ≤ 190
(L-PE) ≤ 600 ≤ 600 ≤ 600 ≤ 600
Voltage Protection Rating UP @ C3 (1 kV/μs) per line (L-L) ≤ 24 ≤ 38 ≤ 48 ≤ 145
(L-PE) ≤ 800 ≤ 800 ≤ 800 ≤ 800
Response Time ≤ 25 ns
Visual Status Indication LED: Green = Normal, Dark = Replace
Location Category Indoor Only
Method of Mounting Wall mount or Fixed 35 mm DIN rail
Dimension (H x W x D) 3.94” x 2.8” x 2.3”
100 mm x 71.1 mm x 57.9 mm
3.94” x 1.4” x 2.3”
100 mm x 35.6 mm x 57.9 mm
Weight (Max) 0.5 lb (0.25 kg)  0.9 lb (0.45 kg)
Maximum Wire Size #6 AWG
Multistrand 13 mm2
Operating Temperature -40° F to +176° F (-40° C to +80° C)
Relative Humidity ≤ 95% non-condensing
Altitude ≤ 3000 m
Enclosure Protection Level IP 20
Housing Inflammability Rating Thermoplastic, UL 94 V-0

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