Type 2 AC surge protector - 3-phase+N
DS44S-400/M
Part Number: 461425
  • For 400 Vac, 3-phase Delta network
  • In : 20 kA
  • Imax total : 40 kA
  • Pluggable module for each phase
  • Remote signaling
  • NF EN 61643-11, CEI 61643-11 compliance
  • UL1449 ed.11

used mainly for primary protection of single and 4- phase networks at the main electrical panel. They provide common-mode or common and differential mode. This SPD is based on high energy varistor equipped with thermal disconnector and failure indicator, to comply with standards. The DS40 surge protectors are designed to be used in a multipolar configuration to protect single-phase, 3-phase or 3-phase+Neutral AC networks.They are sometimes associated with dedicated N/PE surge protector based on gas tube technology.


SPD type 2
Network 400 V 3-phase Delta
AC system IT
Nominal line voltage Un 400 Vac
Max. AC operating voltage L-N Uc 440 Vac
Temporary Over Voltage (TOV) Charasteristics - 5 sec. UT 580 Vac withstand
Temporary Over Voltage (TOV) Charasteristics - 120 mn UT 770 Vac disconnection
Operating current Ic < 1 mA
Follow current If None
Nominal discharge current In 20 kA
Max. discharge current Imax 40 kA
Connection mode(s) L/L and L/PE
Protection mode(s) Common mode
Residuel voltage at 5 kA Up-5kA 1.3 kV
Protection level L/PE Up L/PE 1.8 kV
Residual voltage at 10 kA Up-10kA 1.5 kV
Admissible short-circuit current Isccr 25000 A
Technology MOV
SPD configuration Delta 3-phase
Connection to Network By screw terminals: 2.5-25 mm² / by bus
Format Plug-in modular box
Mounting Symmetrical rail 35 mm (EN60715)
Housing material Thermoplastic UL94-V0
Operating temperature -40/+85°C
Protection rating IP20
Failsafe mode Disconnection
Disconnection indicator 1 mechanical indicator by pole
Spare module(s) DSM40-400/M
Remote signaling of disconnection Output on changeover contact
Dimensions See diagram
Weight 0.336 kg
Standards compliance IEC 61643-11 / EN 61643-11 / UL1449 4ed.
Certification UL / EAC / TUV