Fuses+holders for protection of 3-phase+N Type 1 AC SPD

SFD1-25S-31
SFD1-25S-31
Part Number: 64058
  • Specific Fuses (SPD Fusing Disconnectors) for short circuit protection of AC SPD
  • For Type 1 SPD
  • Surge current withstand: 25 kA (@10/350µs)
  • Very compact
  • Included fuses
  • Remote signaling and status signaling

The SFD range has been especially designed to associated with Type 1 SPDs. These very specific fuses are able to conduct huge surge currents in rather small dimensions to protect Type 1 SPDs against harsh current circuit failures. In order to comply IEC 61643-11 standards, AC power SPD must be protected against short circuit failures: these specific fusing disconnectors must be installed in the SPD branch.


AC system TT-TN
Max. AC operating voltage Uc 500 Vac
Nominal discharge current In 80 kA
Max. discharge current Imax 100 kA
Impulse current by pole Iimp 25 kA
Breaking capacity 100 000 A
Residual voltage Up < 0.5 kV @ 25 kA
Fuse configuration Cylindrical 22x58 mm
Fuse holder configuration Circuit breaker configuration for 3-phase+N
Mounting Symmetrical rail 35 mm (EN 60715)
Accessory(s) provided Fuse(s) included
Operating temperature Tu -40/+85°C
Protection rating IP20
Disconnection indicator Striker
Spare module(s) SFD1-25
Remote signaling of disconnection Yes
Dimensions See diagram
Standards compliance EN 61643-11 /IEC 61643-11 /EN 60269-1/EN 60269-2/IEC 60269-1/IEC 60269-2
Equivalent rated AC current 250 A