High Speed Fuses
Square body US style — 1250V/1300V (IEC/UL):
50-1400A
3
2.5
Arc Voltage
1250V/1300V (IEC/UL) 50-1400A
U
L
This curve gives the peak
Specifications
Description: Square body US
style high speed fuses.
arc voltage, U , which may 1.8
L
1.4
appear across the fuse
during its operation as a
function of the applied
working voltage, E , (rms)
at a power factor of 15%.
103
8
Dimensions: See dimensions
illustration.
6
5
g
Ratings:
Volts: — 1250Vac (IEC)
— 1300Vac (UL)
4
3
Eg
Power Losses
400 600
800 1000 1200 1400
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-
Amps: — 50-1400A
IR: — 100kA RMS Sym.
1.0
0.8
Kp
Agency Information: CE,
Designed and tested to IEC
60269: Part 4, UL Recognized.
Consult Cooper Bussmann for UL
Recognition/CSA Component
Acceptance status.
0.6
0.5
0.4
0.3
tion factor, K , is given as
p
a function of the RMS load 0.2
1.5
1.25
1.0
current, I , in % of the
K
Electrical
b
Ib
rated current.
0.1
Characteristics
30 40 50 60
80 90 100%
70
Features and Benefits
• Excellent dc performance
• Low arc voltage and low energy let-through (I t)
• Low watts loss
• Superior cycling capability
Total Clearing I2t
0.5
2
2
The total clearing I t at
0.4
rated voltage and at power
0.3
factor of 15% are given in
the electrical characteris-
tics. For other voltages, the 0.2
Typical Applications
• DC common bus
• DC drives
• Power converters/rectifiers
• Reduced voltage starters
Eg
2
clearing I t is found by mul-
tiplying by correction factor,
K, given as a function of
400 600 800 1000 1200 1400
Dashed lines (- - - - - -) apply to the
following amperages:.
Size
1*
1
Amps.
400A
500-630A
630-1000A
800-1400A
applied working voltage, E ,
(rms).
g
2
3
Dimensions (mm)
Type -FU/115, -FKE/115
Size
1*
1
2
3
B
C1
C2
D
E
H
I
156
160
160
159
130
127
127
128
101
102
102
101
59
69
77
92
45
53
61
76
20
25
25
36
10
14
14
16
1mm = 0.0394” / 1” = 25.4mm
B
6
A
D
E
C1
C2
E
I
H
For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp
175