7-18-01 SB01191
Form No. FWP
Page 1 of 1
BIF Doc #720026
Bussmann®
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®
Ferrule
FWP 660V/700V (IEC/U.L.) 20-100A
Dimensions
K
1.4
1.2
1.0
0.6
0.8
0.7
0.9
0.5
0.4
0.3200 300 400 500 600 700
Eg
UL
1.4
1.2
103
6
8
7
9
5
4
3200 300 400 500 600 700
Eg
Kp
1.0
0.8
0.4
0.5
0.6
0.3
0.2
0.130 40 50 60 70 80 90 100%
Ib
58.0
(2.283")
15.0
(0.591")
22.2
(0.875")
Electrical Characteristics Ordering Information Dimensions Curves
Rated I2t (A2S) Carton
Current Clearing Watts Part Carton Weight Figure
Size RMS-Amps Pre-arc at 660V Loss Number Qty. (kg) Number BIF #
20 23 260 4.6 FWP-20A22F
25 37 410 5.6 FWP-25A22F
32 55 605 7.0 FWP-32A22F
22 ≈ 58mm 40 68 750 8.5 FWP-40A22F 10 0.450 Fig. 1 35785291
(‡Ω•∑) 50 155 1600 9.5 FWP-50A22F
63 280 3080 11 FWP-63A22F
80 600 6600 13.5 FWP-80A22F
100 1100 12500 16 FWP-100A22F
n Interrupting rating 200kA RMS Symmetrical. 1 kg = 2.2 lbs. 1 lb = 0.45 kg
n Watts loss provided at rated current.
n (500 Vdc/Interrupting rating 50kA) U.L. Recogition.
Fig. 1: 20-100 Amp Range
Dimension in mm.
1mm = 0.0394∑ 1∑ = 25.4mm
Total Clearing I2t
The total clearing I2t at rated voltage and
at power factor of 15% are given in the
electrical characteristics. For other volt-
ages, the clearing I2t is found by multi-
plying by correction factor, K, given as
a function of applied working voltage,
Eg, (RMS).
Arc Voltage
This curve gives the peak arc voltage,
UL, which may appear across the fuse
during its operation as a function of the
applied working voltage, Eg, (RMS) at a
power factor of 15%.
Power Losses
Watts loss at rated current is given in
the electrical characteristics. The curve
allows the calculation of the power
losses at load currents lower than the
rated current. The correction factor, Kp,
is given as a function of the RMS load
current, Ib, in % of the rated current .
Electrical Characteristics
