Form No.
Page 1 of 1
BIF Doc #720025
Bussmann®
The only controlled copy of this BIF document is the electronic read-only version located on the 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. Bussmann also reserves the right to change or update, without
notice, any technical information contained in this bulletin. Once a product has been selected, it should be tested
by the user in all possible applications.
Ferrule
FWP 660V/700V (IEC/U.L.) 1-50A ®
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
1)
2)
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
50.8
(2.000")
15.5
(0.610")
14.3
(0.563")
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 #
1 — — — FWP-1A14F
2 — — — FWP-2A14F
3 — — — FWP-3A14F
4 — — — FWP-4A14F
5 1.6 11 1.5 FWP-5A14F
6 — — — FWP-6A14F
14 ≈ 51mm 10 3.6 22 4 FWP-10A14F 10 0.225 Fig. 1 35785307
(·Ω¡§∑) 15 10 75 5.5 FWP-15A14F
20 26 180 6 FWP-20A14F
25 44 320 7 FWP-25A14F
30 58 450 9 FWP-30A14F
32 68 600 7.6 FWP-32A14F
40 84 750 8 FWP-40A14F
50 200 1800 9 FWP-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 (700 Vdc/Interrupting rating 50kA) U.L. Recognition.
n CSA Component Acceptance: 5 - 30A.
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 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
7-18-01 SB01191
R
