†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.
