Bussmann
Ferrule
FWX 250V (U.L.) 1-30A
Electrical Characteristics Ordering Information Dimensions Curves
2 2
I t (A S)
Rated Carton
Current Clearing Watts Part Carton Weight Figure
Size RMS-Amps Pre-arc at 250V Loss Number Qty. (kg) Number BIF #
1 FWX-1A14F
2 FWX-2A14F
3 FWX-3A14F
4 FWX-4A14F
14 51mm 5 1.6 13 1.3 FWX-5A14F 10 0.225 Fig. 1
35785302
() 10 3.6 24 3.4 FWX-10A14F
15 14 83 3.8 FWX-15A14F
20 33 200 4.6 FWX-20A14F
25 58 300 5.3 FWX-25A14F
30 100 500 5.9 FWX-30A14F
50 200 1800 5.7 FWX-50A14F
n Interrupting rating 200kA RMS Symmetrical. 1 kg = 2.2 lbs. 1 lb = 0.45 kg
n Watts loss provided at rated current.
n (250 Vdc/Interrupting rating 50kA) U.L. Recognition on 5 through 30 amperes only. Consult Bussmann for additional ratings.
n See accessories on page 90.
Dimensions
Fig. 1: 1-30 Amp Range
50.8 14.3
(2.000") (0.563")
15.5
Dimension in mm.
(0.610")
1mm = 0.0394 1 = 25.4mm
Electrical Characteristics
2
Total Clearing I t Arc Voltage Power Losses
2
The total clearing I t at rated voltage and This curve gives the peak arc voltage, Watts loss at rated current is given in
at power factor of 15% are given in the U , which may appear across the fuse the electrical characteristics. The curve
L
electrical characteristics. For other volt- during its operation as a function of the allows the calculation of the power
2
ages, the clearing I t is found by multi- applied working voltage, E , (RMS) at a losses at load currents lower than the
g
plying by correction factor, K, given as power factor of 15%. rated current. The correction factor, K ,
p
a function of applied working voltage, is given as a function of the RMS load
E , (RMS). current, I , in % of the rated current .
g b
1.4 1.0
1.5
Kp
U
K 1.2
L 0.8
3
1.0 10
0.6
0.5
800
0.4
600
0.5
0.3
500
400
0.2
0.3
300
0.2
E
g I
b
Eg 0.1
200
0.15
50 100 150 200 250V
30 40 50 60 80 90 100%
75 125 200 250 300 70
RMS
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Bussmann Network Drive. All other copies of this document are by definition uncontrolled. This bulletin
is intended to clearly present comprehensive product data and provide technical information that will
help the end user with design applications. Bussmann reserves the right, without notice, to change
design or construction of any products and to discontinue or limit distribution of any products.
Form No.
Bussmann also reserves the right to change or update, without notice, any technical information con-
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tained in this bulletin. Once a product has been selected, it should be tested by the user in all possible
SB01191 BIF Doc #720006
7-18-01 applications.