Bussmann®
Form No. FWH 500
Page 1 of 2
BIF Doc #720007
FWH 500V 35-1600A
Electrical Characteristics Ordering Information Dimensions Curves
Rated I2t (A2Sec) Carton
Current Clearing Watts Part Carton Weight Figure
Type RMS-Amps Pre-arc at 500V Loss Number Qty. (lbs) Number BIF #
35 34 150 8 FWH-35B
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40 76 320 7.5 FWH-40B
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45 105 450 7.5 FWH-45B 5 0.71
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50 135 670 7.5 FWH-50B
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60 210 900 9.9 FWH-60B 35785304
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70 210 900 10.6 FWH-70B
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80 305 1400 12.7 FWH-80B
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90 360 1600 15 FWH-90B 0.21
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100 475 2000 17 FWH-100B
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125 800 3500 25 FWH-125B
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150 1100 4600 30 FWH-150B
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175 1450 6200 35 FWH-175B 0.33
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200 1900 8500 40 FWH-200B Fig. 1
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FWH 225 4600 23300 39 FWH-225A
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500V 250 6300 32200 41 FWH-250A
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275 7900 40300 46 FWH-275A
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300 9800 49800 51 FWH-300A 0.57
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325 13700 63800 53 FWH-325A 1 360
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350 14500 72900 58 FWH-350A
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400 19200 96700 65 FWH-400A
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450 24700 127000 74 FWH-450A
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500 29200 149000 84 FWH-500A 1.00
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600 41300 206000 108 FWH-600A
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700 55000 298000 120 FWH-700A
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800 76200 409000 129 FWH-800A 2.14
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1000 92000 450000 145 FWH-1000A
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1200 122000 600000 180 FWH-1200A 4.62
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1400 200000 1000000 210 FWH-1400A Fig. 2 35785304
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1600 290000 1400000 230 FWH-1600A 11.66
†U.L. Recognition on 35 through 1200 amperes only. 1 kg = 2.2 l bs 1 lb = 0.45 kg
CSA Component Acceptance: 35 - 1600A.
nInterrupting rating 200kA RMS Symmetrical.
nWatts loss provided at rated current.
n(500 Vdc/Interrupting rating 50kA) U.L. Recognition on 35 through 800 amperes only.
®
†
7-11-01 SB01191
R
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.
Form No. FWH 500
Page 2 of 2
BIF Doc #720007
®
FWH 500V 35-1600A
Order # Fig. A B C D E F G H J
FWH-35B-60B 1 3.188 0.813 1.593 2.541 2.193 0.344 0.719 0.125 0.518
FWH-70B-100B 1 3.625 0.947 1.736 2.853 2.807 0.352 0.750 0.125 0.375
FWH-125B-200B 1 3.625 1.156 1.836 2.892 2.768 0.344 1.000 0.188 0.406
FWH-225A-400A 1 4.340 1.500 2.090 3.440 2.750 0.410 1.000 0.250 0.750
FWH-450A-600A 1 4.340 2.000 2.090 3.530 2.780 0.410 1.500 0.250 0.780
FWH-700A-800A 1 6.340 2.500 2.090 4.970 3.440 0.530 2.000 0.380 1.300
FWH-1000A-1200A 1 6.969 3.000 3.219 5.465 4.475 0.625 2.375 0.438 1.120
FWH-1400A-1600A 2 See Drawing
Dimensions
A
E
D
C
F
J
GB
H
10.219
3.219 0.625
4.25
0.75
3.5
6.219
0.125 0.5 1.625
1.750
8.969
500400250100
1.5
1.0
0.5
0.3
0.2
0.15 Eg
K
1)
2)
UL
2.0
1.6
1.2
103
800
600
500
400
300
100 400300200 500
Eg
2)
1)
Kp
1.0
0.8
0.4
0.5
0.6
0.3
0.2
0.1 30 40 50 60 70 80 90 100%
Ib
Fig. 1: 35-1200 Amp Range Fig. 2: 1400-1600 Amp Range
Dimension in inches.
1mm = 0.0394∑ 1∑ = 25.4mm
1) 35-800 Amp Range
2) 1000-1600 Amp Range 1) 35-200 & 1000-1600 Amp Range
2) 225-800 Amp Range
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
7-11-01 SB01191
R
†
