Surge fuses for protection of Type 1 AC SPD

SFD1-25
Part Number 39489
SFD1-25
  • Specific Fuses (SPD Fusing Disconnectors) for short circuit protection of Type 1 AC surge protectors
  • Surge current withstand: 25 kA @ 10/350µs
  • 10 units per packaging
  • Very compact
  • Fusion signaling feature
  • Remote signaling though fuse holder
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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 msut be installed in the SPD branch. The SFD are equipped with fusing indicator to be used inside holder with remote signalling feature. The SFD disconectors must be used with specific fuse holders which provide : - relevant surge current capability - remote signaling feature - switching (useful for maintenance purpose)
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Max. AC operating voltage
Uc 500 Vac
Nominal discharge current
15 x 8/20 µs impulses
 In 80 kA
Max. discharge current
max. withstand @ 8/20 µs by pole
 Imax 100 kA
Impulse current by pole
max. withstand 10/350µs by pole
 Iimp 25 kA
Equivalent rated AC current
 250 A
Breaking capacity
 100 000 A
Fusing indicator
 Yes
Remote fusing indication
 Through dedicated fuse holder
Residual voltage
 Up < 0.9 kV @ 25 kA
Format
 Cylindrical
Mounting
 On cylindrical fuse holder
Operating temperature
 Tu -40/+85°C
Protection rating
 IP20
Number of units per package
10 units per packaging
Dimensions
 22x58 mm
Associate Fuse holder
 BSFD22-10S & SFD1-25 1 pole BSFD22-11S* & SFD1-25 single phase (L+N) BSFD22-20S & SFD1-25 2-phase BSFD22-30S & SFD1-25 3-phase BSFD22-31S* & SFD1-25 3-phase+N BSFD22-40S & SFD1-25 4-phase *The Neutral position is equipped with a non-fusing element The fuse holders are all equipped with a remote signaling
Weight
 25g
Standards compliance
 EN 61643-11 /IEC 61643-11 /EN 60269-1/EN 60269-2/IEC 60269-1/IEC 60269-2