High Speed Fuses
For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp 97
High Speed
Fuses
North American — FWH 500V: 35-1600A
FWH
Specifications
Description: North American style
stud-mount fuses.
Dimensions: See Dimensions
illustration.
Ratings:
Volts: — 500Vac
Amps: — 35-1600A
IR: — 200kA Sym.
— 50kA @ 500Vdc
Agency Information: CE, UL Recognition & CSA
Component Acceptance on 35-800A only (50kA
IR@500Vdc). UL Recognition on 35-1200A only, CSA
Component Acceptance: 35-1600A.
Electrical Characteristics
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 multiplying 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 cur-
rent is given in the elec-
trical characteristics. The
curve allows the calcula-
tion 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.
Catalog Numbers
Electrical Characteristics
Rated I2t (A2Sec)
Catalog Current Clearing Watts
Numbers RMS-Amps Pre-arc at 500V Loss
FWH-35B 35 34 150 8
FWH-40B 40 76 320 7.5
FWH-45B 45 105 450 7.5
FWH-50B 50 135 670 7.5
FWH-60B 60 210 900 9.9
FWH-70B 70 210 900 10.6
FWH-80B 80 305 1400 12.7
FWH-90B 90 360 1600 15
FWH-100B 100 475 2000 17
FWH-125B 125 800 3500 25
FWH-150B 150 1100 4600 30
FWH-175B 175 1450 6200 35
FWH-200B 200 1900 8500 40
FWH-225A 225 4600 23300 39
FWH-250A 250 6300 32200 41
FWH-275A 275 7900 40300 46
FWH-300A 300 9800 49800 51
FWH-325A 325 13700 63800 53
FWH-350A 350 14500 72900 58
FWH-400A 400 19200 96700 65
FWH-450A 450 24700 127000 74
FWH-500A 500 29200 149000 84
FWH-600A 600 41300 206000 108
FWH-700A 700 55000 298000 120
FWH-800A 800 76200 409000 129
FWH-1000A 1000 92000 450000 145
FWH-1200A 1200 122000 600000 180
FWH-1400A 1400 200000 1000000 210
FWH-1600A 1600 290000 1400000 230
• Watts loss provided at rated current. • See accessories on page 106.
Features and Benefits
• Excellent dc performance
• Low arc voltage and low
energy let-through (I2t)
• Low watts loss
• Superior cycling capability
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)
1) 35-200 & 1000-1600A Range
2) 225-800A Range
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
Fig. 1: 35-1200A
Fig. 2: 1400-1600A
Dimensions (in)
Amp
Range Fig. A B C D E F G H J
35-60 1 3.188 0.813 1.593 2.541 2.193 0.344 0.719 0.125 0.518
70-100 1 3.625 0.947 1.736 2.853 2.807 0.352 0.750 0.125 0.375
125-200 1 3.625 1.156 1.836 2.892 2.768 0.344 1.000 0.188 0.406
225-400 1 4.340 1.500 2.090 3.440 2.750 0.410 1.000 0.250 0.750
450-600 1 4.340 2.000 2.090 3.530 2.780 0.410 1.500 0.250 0.780
700-800 1 6.340 2.500 2.090 4.970 3.440 0.530 2.000 0.380 1.300
1000-1200 1 6.969 3.000 3.219 5.465 4.475 0.625 2.375 0.438 1.120
1400-1600 2 See Drawing
1mm = 0.0394” / 1” = 25.4mm
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
1) 35-800A Range
2) 1000-1600A Range
Typical Applications
• DC common bus
• DC drives
• Power converters/rectifiers
• Reduced voltage starters
For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp
98
High Speed Fuses
North American — FWH 500V: 35-1600A
2468
10222468 2
1032468
104
2
4
6
2
6
4
2
6
4
2
6
4
2
6
4
2
6
4
6
4
2
6
2
4
100
101
10–1
10–2
10–3
10–4
102
103
104
FWH-90B
FWH-80B
FWH-125B
FWH-100B
FWH-175B
FWH-200B
FWH-150B
FWH-60B
FWH-70B
FWH-50B
FWH-45B
FWH-40B
FWH-35B
FWH-1200A
FWH-1400A
FWH-900A
FWH-1000A
FWH-1600A
Prospective Current In Amper es RMS
10–3
10–2
10–1
100
101
102
103
10–4
FWH-350A
FWH-400A
FWH-500A
FWH-600A
FWH-800A
Prospective Current In Amperes RMS
Virtual Pre-Arcing Time In Seconds
102103104105
FWH 225-800A: 500V
Time-Current Curve
FWH 35-200A(B) & 900-1600A(A): 500V
Time-Current Curve
FWH-200B
FWH-150B
FWH-125B
FWH-100B
FWH-80B
FWH-60B
FWH-50B
FWH-35B
FWH-40B
FWH-1000A
FWH-1200A
FWH-1400A
FWH-1600A
Prospective Short-Circuit Current Symmetrical RMS
Peak Let-Through Current
2
4
2
6
6
4
2
6
4
246 246 246 2
102
103
104
105
102103104105
FWH-800A
FWH-600A
FWH-500A
FWH-400A
FWH-300A
FWH-250A
102
105
104
103
103104105
102
Prospective Short-Circuit Current Symmetrical RMS
Peak Let-Through Current
A
B
Peak Let-Through Curve
Peak Let-Through Curve
Data Sheet: 35785304 Data Sheet: 360
