Westcode Semiconductors F070CxxxN, F070CxxxS Tripping Curves

WESTCODE An IXYS Company French Ferrule Type Fuses 690V

Electrical Characteristics:

Times vs current characteristics

The following curve indicate, for each rated
current, pre-arcing time as a function of RMS value
of pre-arcing current I.

Tolerance for mean pre-arcing current:
±10% = ratings from 1, 2, 4A
± 8% = ratings from 6 to 63A
Fuses with gR characteristics can eliminate all

overloads.
They do not show a minimum breaking capacity

but limit currents of non-operation or operation in
compliance with standard VDE 636/23.

Total clearing I²T: Cut off Characteristics:

Horizontal curve shows maximum values of total
clearing I

2

t (I2tt) for each rated current as a

function of prospective current Ip @ 690V cosϕ =

The curve above shows, for each rating, value of
peak let-through current I
available fault current Ip.

0.15 (for 125-135A @ 600V cosϕ = 0.15). Oblique
lines indicate total clearing duration Tt, with
associated pre-arcing duration in brackets.

as a function of

C

Data Sheet. F070CxxxN/S Issue 1 Page 3 of 4 March, 2005

WESTCODE An IXYS Company French Ferrule Type Fuses 690V

Corrective Factor Peak arc voltage

Mean curves showing variation of total clearing time

2

tt) and total clearing duration Tt as a function of

(I
operating voltage U.

125A and 135A rating (2) 20-100A rating

Curves showing peak value Um of arc voltage which
appears across fuse-link as a function of operating
voltage U @ cosϕ = 0.15

Data Sheet. F070CxxxN/S Issue 1 Page 4 of 4 March, 2005