High Speed Fuses
For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp 93
High Speed
Fuses
2.656
1.936
2.188
1.156
0.312
0.438
0.750 1.000
0.125
Dimensions (in)
Fig. 1: 70-400A
1.500
0.250
3.500
2.438
1.250
1.000
0.406
Fig. 2: 500-1000A
1mm = 0.0394 “ / 1” = 25.4mm
North American — FWA 150V: 70-1000A
FWA
Specifications
Description: North American style
stud-mount fuses.
Dimensions: See Dimensions
illustrations.
Ratings:
Volts:— 150Vac
Amps:— 70-1000A
IR:— 100kA Sym. (70-400A)
— 200kA Sym. (450-1000A)
— 20kA @150Vdc (70-800A)
— 100kA @ 80Vdc (70-400A)
Agency Information: CE, UL Recognized
Electrical Characteristics
Total Clearing I2t
The total clearing I2t at rated
voltage and at power factor of
15% are given in the electri-
cal characteristics. For other
voltages, the clearing I2t is
found by multiplying by cor-
rection 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 dur-
ing its operation as a func-
tion 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 correc-
tion 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
Number RMS-Amps Pre-arc at 150V Loss
FWA-70B 70 470 4000 6.9
FWA-80B 80 670 6000 7.7
FWA-100B 100 1200 12000 9.0
FWA-125B 125 1870 18000 11.2
FWA-150B 150 2700 26000 13.5
FWA-200B 200 4780 45000 17.6
FWA-250B 250 7470 70000 22.5
FWA-300B 300 10760 100000 27.0
FWA-350B 350 15700 140000 30.6
FWA-400B 400 20300 180000 35.2
FWA-500A 500 39000 120000 35.0
FWA-600A 600 46000 140000 47.0
FWA-700A 700 75000 220000 49.0
FWA-800A 800 92000 280000 58.0
FWA-1000A 1000 170000 510000 60.0
• 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
Typical Applications
• DC common bus
• DC drives
• Power converters/rectifiers
• Reduced voltage starters
1501027022
1.5
1.0
0.5
0.3
0.2
0.15 Eg
K
1)
2)
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
UL
Eg
200
100
100 15050
300
1) 500-1000A Range
2) 70-400A Range
For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp
94
High Speed Fuses
North American — FWA 150V: 70-1000A
Prospective Current In Amperes RMS
Virtual Pre-Arcing Time In Seconds
1022468
1032468
104
2
4
6
2
6
4
100
2
6
4
101
2
6
4
2
6
4
2
6
4
6
4
2
6
2
4
10–1
10–2
10–3
10–4
102
103
104
FWA-1000A
FWA-800A
FWA-700A
FWA-600A
FWA-500A
FWA-200A
FWA-400A
FWA-350A
FWA-300A
FWA-250A
FWA-150A
FWA-70A
FWA-80A
FWA-100A
FWA-125A
FWA 70-1000A: 150V
Time-Current Curve
Prospective Short-Circuit Current Symmetrical RMS
Peak Let-Through Current
2
6
4
2
6
4
2
6
4
246 246 246
102
103
104
106
102103104105
2
FWA-400A
FWA-350A
FWA-300A
FWA-250A
FWA-200A
FWA-150A
FWA-100A
FWA-80A
FWA-70A
Peak Let-Through Curve
Data Sheet: 35785310
Cooper Bussmann®Equipped Solar Car
Wins American Solar Challenge Race
The University
of Missouri-
Rolla Solar Car
Team won the
prestigious
American Solar
Challenge Race
recently with
circuit protection provided by Cooper Bussmann
FWX series 80 amp semiconductor fuses.
The gr ueling endurance test pitted UM-Rolla’s “Solar
Miner IV” against race teams from some of the
most famous engineering schools in the na tion. By
driving approxima tely 2,300 miles from Chicago to
Claremont (a suburb of Los Angeles), in just 51
hours, 47 minutes and 39 seconds, they set a race
record by more than four hours.
Did You Know?
