Type 2 AC surge protector - 3-phase+N
DAC50S-31-275
DAC50S-31-275
Part Number: 821110244
  • Type 2 AC surge protector
  • In : 20 kA
  • Imax : 50 kA
  • Pluggable module for each phase
  • Remote signaling
  • NF EN 61643-11, IEC 61643-11 compliance

The pluggable surge protectors Type 2 DAC50, are designed to protect AC powerline at the main switchboard of the installation. These SPDs are based on high energy varistor equipped with thermal disconnector and failure indicator, to comply with standards and to provide a maximum protection efficiency, an high impulse current capability and a improved reliability. The surge protectors DAC50 are available in multipolar version and in several voltages to protect single or 3-phase networks.


SPD type 2
Network 230/400 V 3-phase+N
AC system TT-TNS
Max. AC operating voltage L-N Uc 275 Vac
Temporary Over Voltage (TOV) Charasteristics - 5 sec. UT 335 Vac withstand
Temporary Over Voltage (TOV) Charasteristics - 120 mn UT 440 Vac disconnection
Temporary Over Voltage N/PE (TOV HT) UT 1200 V/300A/200 ms withstand
Residual Current Ipe None
Follow current If None
Nominal discharge current In 20 kA
Max. discharge current Imax 50 kA
Total Maximal discharge current Imax Total 50 kA
Protection mode(s) L/N and N/PE
Protection level L/N Up L/N 1.25 kV
Residual voltage L/N at 5 kA Up-5kA 1 kV
Protection level N/PE at 5 kA Up-5kA 1 kV
Admissible short-circuit current Isccr 50 000 A
Technology MOV+GDT
SPD configuration 3-phase+Neutral
Connection to Network by screw terminals: 2.5-25 mm²
Format Plug-in modular box
Mounting Symmetrical rail 35 mm (DIN 60715)
Housing material Thermoplastic UL94-V0
Operating temperature Tu -40/+85°C
Protection rating IP20
Failsafe mode Disconnection from AC network
Disconnection indicator 1 mechanical indicator by pole - Red/Green
Spare module(s) MDAC50-275+MDACG-275
Remote signaling of disconnection output on changeover contact
Wiring for remote signaling 1.5 mm² max.
Maw. Voltage/Current for remote signaling 250 V / 0.5 A (AC) / 30 V / 3 A (DC)
Dimensions See diagram - 4TE (EN43880)
Weight 0.364 kg
Standards compliance IEC 61643-11 / EN 61643-11 / UL1449 4ed.
Certification OVE
Thermal disconnector Internal
Installation ground fault breaker Type 'S' or delayed
Fuses 50 A mini. - 125 A max. - Fuses Type gG