Submittal Sheet
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%.
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.
Catalog Numbers
Electrical Characteristics
I
2
t (A
2
Sec)
Rated
Catalog Current Clearing Watts
Numbers Size RMS-Amps Pre-arc at 150V Loss
FWA-5A10F 5 1.6 8 1
FWA-10A10F 10 3.6 16 2.7
FWA-15A10F 10 x 38mm 15 14 55 3.3
FWA-20A10F (
13
⁄32” x 1
1
⁄2”) 20 33 130 3.8
FWA-25A10F 25 58 220 4.9
FWA-30A10F 30 100 400 4.9
FWA-35A21F 35 75 800 4.5
FWA-40A21F
21 x 51mm
40 100 1000 5.1
FWA-45A21F
(
13
⁄16” x 2”)
45 130 1300 6
FWA-50A21F 50 170 1600 7.3
FWA-60A21F 60 250 2400 8.0
• Watts loss provided at rated current.
• See accessories on page 216.
Features and Benefits
• Excellent cycling capability and DC performance
• Low arc voltage and low energy let-through (I
2
t)
• Low watts loss in a compact size
• Used with finger-safe holders/blocks
Typical Applications
• DC common bus
• DC drives
• Power converters/rectifiers
• Reduced voltage starters
Ferrule — FWA 150V: 5-60A
Dimensions - in (mm)
Amp Dimensions
Range A B C
5-30 1.5 (38.1) 0.375 (9.5) 0.406 (10.3)
35-60 2.0 (50.8) 0.625 (15.9) 0.811 (20.6)
U
L
E
g
200
100
100 15050
300
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%
I
b
A
B
C
FWA 5-30A (10 x 38mm)
35-60A (21 X 51mm)
Specifications
Description: Ferrule style high
speed fuses.
Dimensions: See dimensions
illustration.
Ratings:
Volts: — 150Vac/dc
Amps: — 5-60A
IR: — 100kA Sym.
Agency Information: CE, UL Recognition
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
voltages, the clearing I
2
t is
found by multiplying by
correction factor, K, given
as a function of applied
working voltage, E
g
, (rms).
1501027022
1.5
1.0
0.5
0.3
0.2
0.15
Eg
K
1)
2)
1) 5-30A Range
2) 35-60A Range
Data Sheet: 720003
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
197
High Speed
Fuses
High Speed Fuses