Form No.
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BIF Doc #720025
Bussmann
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by the user in all possible applications.
12-28-98
SB98107
Rev. A
Ferrule
FWP 660V/700V (IEC/U.L.)
1-50A
Dimensions
K
1.4
1.2
1.0
0.9
0.6
0.8
0.7
0.5
0.4
0.3
200
300
400
500
600
700
E
g
1)
2)
U
L
1.4
1.2
10
3
9
6
8
7
5
4
3
200
300
400
500
600
700
E
g
K
p
1.0
0.8
0.4
0.5
0.6
0.3
0.2
0.1
30 40 50
60
70
80
90 100%
I
b
50.8
(2.000")
15.5
(0.610")
14.3
(0.563")
Electrical Characteristics
Ordering Information
Dimensions
Curves
Rated
Current
RMS-Amps
I
2
t (A
2
S)
Carton
Weight
(kg)
See Page
or
(BIF #)
Clearing
at 660V
—
—
—
—
11
—
22
75
180
320
450
600
750
1800
Watts
Loss
—
—
—
—
1.5
—
Part
Number
FWP-1A14F
FWP-2A14F
FWP-3A14F
FWP-4A14F
FWP-5A14F
FWP-6A14F
FWP-10A14F
FWP-15A14F
FWP-20A14F
FWP-25A14F
FWP-30A14F
FWP-32A14F
FWP-40A14F
FWP-50A14F
Carton
Qty.
Figure
Number
Size
Pre-arc
—
—
—
—
1.6
—
3.6
10
26
44
58
68
84
200
1
2
3
4
5
6
14 ≈ 51mm
(ᤷ)
10
15
20
25
30
32
40
50
4
10
0.225
Fig. 1
page 94
(35785307)
5.5
6
7
9
7.6
8
9
n
Interrupting rating 200kA RMS Symmetrical.
n
Watts loss provided at rated current.
n
700 Vdc ratings for 5 through 30 amperes only. Consult Bussmann for other ratings.
n
See accessories on page 90.
1 kg = 2.2 lbs. 1 lb = 0.45 kg
Fig. 1: 1-50 Amp Range
1) 5-30 Amp Range
2) 32-50 Amp Range
Dimension in mm.
1mm = 0.0394∑ 1∑ = 25.4mm
Total Clearing I
2
t
The total clearing I
2
t at rated voltage and
at power factor of 15% are given in the
electrical characteristics. For other volt-
ages, the clearing I
2
t is found by multi-
plying by correction factor, K, given as
a function of applied working voltage,
E
g
, (RMS).
Arc Voltage
This curve gives the peak arc voltage,
U
L
, which may appear across the fuse
during its operation as a function of the
applied working voltage, E
g
, (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, K
p
,
is given as a function of the RMS load
current, I
b
, in % of the rated current.
Electrical Characteristics