D221447 AEGIS SEMICONDUTORES LTDA, D221447 Datasheet - Page 2

• Manufacturer Part Number: D221447
• Description: Semiconductor Protection Fuses
• Manufacturer: AEGIS SEMICONDUTORES LTDA

FRENCH CYLINDRICAL
821cp gRB
Above: Horizontal curves show maximum values of total clearing I 2 t (I 2 tt) as function
of prospective current lp. @ U N with cosj = 0.15 Oblique lines indicatye total
clearing duration Tt and associated pre-arching duration in brackets.
Total clearing I
Melting Time Current Data
Below: Curves show, for each rating, value of peak let-through
current Ic as a function of available fault current ip.
Peak let-thru Data
2
t
DC Voltage Capabilities vs. Time Constant
SEMICONDUCTOR PROTECTION FUSES
Left: Curves show,
for
current, pre-arching
time vs. R.M.S.
pre-arching current.
Tolerance for mean
pre-arching current
±
8%.
each
Provides the DC voltage capability of a fuse as a
function of the circuit time constant.
rated
D 103
Clearing i2t vs. Operating Voltage
2000
1800
1600
1400
1200
1000
800
600
400
200
Watts loss Correction
0
0 100
Peak arc voltage
Um (V)
300
500
1 - L/R = 60 ms / 2 - L/R = 30 ms
Above: Curves indicate peak arc voltage Um
which may appear across fuse terminals of
working voltage U, for different values of
time constant L/R of the fault circuit.
DC Peak Arc Voltage
700
800
Correction factor to
determine watts loss
value of a fuse
operating below its
rated current.
U (V)
Determines the peak
arc voltage across
the fuse terminals as
a function of applied
voltage.
Correction Factor
to determine the
clearing I
operating below its
rated voltage
2
t of a fuse
D