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Fuse ufast aR 500VAC/DC 70A blade cc71-72mm

CBFWH-70B

High speed fuse for protection of semiconductor relays, softstarters, AC variable speed drives, rectifiers etc. Since semiconductor have low thermal capacity, the protective device must react very fast. Can be installed in compact fuse disconnectors. Class aR, short-circuit protection only.

Pack size: 1/package
In stock (0 pcs)
Estimated delivery time, if not in stock: 42 days

Rated voltage
500VAC/DC
Rated current
70A
Utilization class
aR
Breaking capacity
200kA AC/50kA DC
Size
Contact blade L92mm/cc71-72mm
I²t, pre-arc/total
210/900 A²s at 500VAC
Power loss
10,6W
UL approval
UL recognized JFHR2, file E91958
CSA approval
CSA comp. Class1422-30, file 57787
Weight, each
0,095kg
Manufacturer's part number
FWH-70B

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High speed fuses

For semiconductor protection. North American high speed fuses have normally a round body and contact blades for bolt-on fixing.

The fuses are normally UL and CSA approved as Application limited OCPD, ie only approved for specific applications according to NEC, National Electrical Code. One type of high speed fuse, approved for Branch circuit protection is available, see North American fuses class J.