banner products tws socomec trans


Surge arrester – Type 1 and 2

for installations with ligthning conductor and for classified sites

SURGYS G50-FE 4 poles
SURGYS G50-FE 4 poles
  • The SURGYS G50-FE surge arrester is designed to ensure the protection of your low voltage distribution installations and your electrical equipment. It acts against industrial operation overvoltages and overvoltages owing to lightning. This type of surge arrester is particularly recommended in case of risk of direct impact of lightning strikes at the main switchboard level, containing electronic devices sensitive to overvoltages.
Recommended in case of risk of direct impact of lightning strikes
  • Thanks to an admitted impulse current Iimp (surge 10/350μs) of 12.5kA, it is recommended for use on main switchboards.
Absence of follow current
  • The multi-varistors technology ensures there is no follow currents and prevents from any risk of inadvertent tripping of input protections.
Thermal disconnection device
  • Guarantees the end of service life disconnection of the surge arrester.
End of service life indicator
  • Indicates the end of life of varistors.
Remote signalling
  • The remote plug-in signalling contact allows disconnection alarm report to a supervision station.
Monobloc base with plug-in module
  • The SURGYS is supplied complete and ready for installation. Its Monobloc base is fitted with replaceable plug-in modules which, at the end of their service life, can be easily and quickly replaced without having to disconnect the Monobloc base.
  • Main switchboard or main distribution panel of a building, equipped with electronic devices (multi-function measurement devices, PLC, etc.) with presence of lightning conductors or protection through meshed cages.
  • Main switchboard equipped with electronics in buildings subjected to high level risk of lightning strikes such as classified installations, installations located in areas prone to high density of lightning strikes, high-rise buildings.
  • Main switchboard equipped with PLC, BMS or CTM, remote monitoring, technical alarms, modems.
  • High-rise buildings safety main switchboard.
  • Lift machinery unit located in the higher part of the building.
  • Safety inverter units.
  • Main switchboard or remote sites containing electronics.
application SURGYS® G50-FE


Front panel

front panel SURGYS® G50-FE 1. Monobloc base
2. End of service life indicator
3. Remote signalling contact
4. DIN-rail mounting
5. Plug-in modules



Network type 230 / 400 VAC
Neutral systems TT-TN-IT
Nominal voltage Un 400 VAC
Maximum voltage Uc 400 VAC
Temporary overvoltage at industrial frequency UT 400 VAC
Protection characteristics
Level of protection Up 1.3 kV
Maximum discharge current ( 1 shock 8/20 μs) Imax 50 kA
Nominal discharge current ( 15 shocks 8/20 μs) In 12.5 kA
Residual voltage at Iimp 1.5 kV
Impulse current (1 shock 10/350 μs) Iimp 12.5 kA
Mode of protection common
Associated characteristics
Residual current Ic < 1 mA
Response time tr < 25 ns
Follow current If none
Rated conditional short circuit current Icc 25 kA
Recommended disconnectors fuses gG 125 A(1)
Type of disconnection indicator mechanical
Number of disconnection indicators 1
Remote signalling contact
Contact type inverter
AC making capacity 0.5 A
DC making capacity 2 A
AC nominal voltage 250 VAC
DC nominal voltage 30 VDC
Sustained current 2 A
Connection type plug-in screw terminal
Max. cross-section of terminal connections 1.5 mm2
Operating conditions
Operating temperature – 40 … + 85 °C
Storage temperature – 40 … + 85 °C
Value complies with article 534.1.5.3 of standard NF C 15100: higher ratings may however be used if reinforced continuity of service of the lightning rod branch is desired.


case SURGYS® G50-FE
Type monobloc design
2P Dimensions W x H x D 36 x 99 x 77 mm
3P Dimensions W x H x D 54 x 99 x 77 mm
Dimensions W x H x D in 4 poles 72 x 99 x 77 mm
Case degree of protection IP20
Terminal block degree of protection IP20
Case material PEI UL94-5VA thermoplastic
Network connection cross-section 5 … 25 mm2
Earth connection cross-section 5 … 25 mm2



Parallel arrangement
parrarel arragement SURGYS® G50-FE



No. of poles Number of side-by-side modules Reference
2 2 4981 0520
3 3 4981 0530
4 4 4981 0540
Description of accessories Reference
Spare plug-in module m-G50-FE 4981 0519