Bussmann
®
FWH 500V
Type
Rated
Current
RMS-Amps
35-1600A
Ordering Information
Watts
Loss
Part
Number
Carton
Qty.
Carton
Weight
(lbs)
R
†
®
Electrical Characteristics
I
2
t (A
2
Sec)
Clearing
Pre-arc
at 500V
Dimensions
Figure
Number
Curves
BIF #
35
34
150
8
FWH-35B
___________________________________________________________________________
40
76
320
7.5
FWH-40B
___________________________________________________________________________
45
105
450
7.5
FWH-45B
___________________________________________________________________________
50
135
670
7.5
FWH-50B
___________________________________________________________________________
60
210
900
9.9
FWH-60B
______________________________________________________________________________________________
___
70
210
900
10.6
FWH-70B
___________________________________________________________________________
80
305
1400
12.7
FWH-80B
___________________________________________________________________________
90
360
1600
15
FWH-90B
___________________________________________________________________________
100
475
2000
17
FWH-100B
___________________________________________________________________________
125
800
3500
25
FWH-125B
___________________________________________________________________________
150
1100
4600
30
FWH-150B
___________________________________________________________________________
175
1450
6200
35
FWH-175B
___________________________________________________________________________
200
1900
8500
40
FWH-200B
___________________________________________________________________________
FWH
___________________________________________________________________________
225
4600
23300
39
FWH-225A
500V
___________________________________________________________________________
250
6300
32200
41
FWH-250A
275
7900
40300
46
FWH-275A
___________________________________________________________________________
300
9800
49800
51
FWH-300A
___________________________________________________________________________
325
13700
63800
53
FWH-325A
___________________________________________________________________________
350
14500
72900
58
FWH-350A
___________________________________________________________________________
400
19200
96700
65
FWH-400A
___________________________________________________________________________
450
24700
127000
74
FWH-450A
___________________________________________________________________________
500
29200
149000
84
FWH-500A
___________________________________________________________________________
600
41300
206000
108
FWH-600A
___________________________________________________________________________
700
55000
298000
120
FWH-700A
___________________________________________________________________________
800
76200
409000
129
FWH-800A
___________________________________________________________________________
1000
92000
450000
145
FWH-1000A
___________________________________________________________________________
1200
122000
600000
180
FWH-1200A
___________________________________________________________________________
1400
200000
1000000
210
FWH-1400A
___________________________________________________________________________
1600
290000
1400000
230
FWH-1600A
†U.L. Recognition on 35 through 1200 amperes only.
CSA Component Acceptance: 35 - 1600A.
Interrupting rating 200kA RMS Symmetrical.
Watts loss provided at rated current.
(500 Vdc/Interrupting rating 50kA) U.L. Recognition on 35 through 800 amperes only.
__________
_
5
0.71
35785304
0.21
__________
_
0.33
__________
_
Fig. 1
0.57
1
360
1.00
__________
_
2.14
__________
_
4.62
_____________________
_
11.66
Fig. 2
1 kg = 2.2 lbs
35785304
1 lb = 0.45 kg
7-11-01
SB01191
Form No. FWH 500
Page 1 of 2
BIF Doc #720007
Bussmann
®
†
FWH 500V
35-1600A
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%.
R
®
Electrical Characteristics
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).
1.5
K
1.0
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 .
1.0
K
p
0.8
0.6
0.5
0.4
0.3
0.2
2.0
1.6
1.2
10
3
U
L
0.5
1)
0.3
0.2
2)
E
g
250
400
500
800
600
2)
500
400
300
100
1)
E
g
200
300
400
500
0.15
100
0.1
30 40 50
60
70
I
b
80 90 100%
1) 35-800 Amp Range
2) 1000-1600 Amp Range
1) 35-200 & 1000-1600 Amp Range
2) 225-800 Amp Range
Dimensions
Fig. 1: 35-1200 Amp Range
A
D
E
C
H
Fig. 2: 1400-1600 Amp Range
10.219
0.125
0.5
3.219
0.625
1.625
1.750
3.5
G F
J
B
6.219
8.969
0.75
4.25
Order #
FWH-35B-60B
FWH-70B-100B
FWH-125B-200B
FWH-225A-400A
FWH-450A-600A
FWH-700A-800A
FWH-1000A-1200A
FWH-1400A-1600A
Fig.
1
1
1
1
1
1
1
2
A
3.188
3.625
3.625
4.340
4.340
6.340
6.969
B
0.813
0.947
1.156
1.500
2.000
2.500
3.000
C
1.593
1.736
1.836
2.090
2.090
2.090
3.219
D
2.541
2.853
2.892
3.440
3.530
4.970
5.465
E
2.193
2.807
2.768
2.750
2.780
3.440
4.475
F
0.344
0.352
0.344
0.410
0.410
0.530
0.625
G
0.719
0.750
1.000
1.000
1.500
2.000
2.375
H
0.125
0.125
0.188
0.250
0.250
0.380
0.438
J
0.518
0.375
0.406
0.750
0.780
1.300
1.120
See Drawing
Dimension in inches.
1mm = 0.0394∑
1∑ = 25.4mm
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.
7-11-01
SB01191
Form No. FWH 500
Page 2 of 2
BIF Doc #720007
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