For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
High Speed Fuses
164
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 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, Kp, is
given as a function of the
RMS load current, Ib, in %
of the rated current.
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
Square Body US Style — 1250V/1300V (IEC/UL): 50-1400A
1250V/1300V (IEC/UL) 50-1400A
Specifications
DDeessccrriippttiioonn::Square body US
style high speed fuses.
DDiimmeennssiioonnss::See dimensions
illustration.
RRaattiinnggss::
Volts: — 1250Vac (IEC)
— 1300Vac (UL)
Amps: — 50-1400A
IR: — 100kA RMS Sym.
AAggeennccyy IInnffoorrmmaattiioonn::CE,
Designed and tested to IEC
60269: Part 4, UL Recognized.
Consult Cooper Bussmann for UL
Recognition/CSA Component
Acceptance status.
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
voltages, the clearing I2t is
found by multiplying by
correction factor, K, given as
a function of applied working
voltage, Eg, (rms).
B
C2
D
E
E
6
H I
C1
A
Dimensions (mm)
Type -FU/115, -FKE/115
SSiizzeeBBCC11CC22DDEEHHII
1* 156 130 101 59 45 20 10
1 160 127 102 69 53 25 14
2 160 127 102 77 61 25 14
3 159 128 101 92 76 36 16
1mm = 0.0394” / 1” = 25.4mm
K
1.5
1.0
1.25
0.5
0.4
0.3
0.2
400 600 800 1000 1200 1400
Eg
UL
3
2.5
8
103
1.4
1.8
6
4
5
3
400 600 800 1000 1200 1400
Eg
Kp
30 40 50 60 70 80 90 100%
Ib
1.0
0.8
0.4
0.5
0.6
0.3
0.2
0.1
Dashed lines (- - - - - -) apply to the
following amperages:.
SSiizzeeAAmmppss..
1* 400A
1 500-630A
2 630-1000A
3 800-1400A For Other Voltage Ratings in This Body Style
• See pages 126 (690V/700V) and 150 (1000V)
165
Square Body US Style — 1250V/1300V (IEC/UL): 50-1400A
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--FFKKEE//111155EElleeccttrriiccaall CChhaarraacctteerriissttiiccss
--FFUU//111155TTyyppee KKRRaatteeddII22tt ((AA22SSeecc))
WWiitthhoouuttIInnddiiccaattoorrCCuurrrreennttCClleeaarriinnggCClleeaarriinnggWWaattttss
IInnddiiccaattoorrffoorr MMiiccrrooSSiizzeeRRMMSS--AAmmppssPPrree--aarrccaatt 11000000VVaatt 11225500VVLLoossss
170M3688 170M3738 50 135 815 1100 15
170M3689 170M3739 63 215 1300 1750 20
170M3690 170M3740 80 420 2500 3350 25
170M3691 170M3741 100 750 4450 5950 30
170M3692 170M3742 125 1450 9000 11500 35
170M3693 170M3743 1* 160 2600 16000 21000 40
170M3694 170M3744 200 5150 31000 41000 45
170M3695 170M3745 250 9200 54500 73000 55
170M3696 170M3746 315 18500 115000 150000 60
170M3697 170M3747 350 27000 165000 220000 65
170M4688 170M4738 160 1900 11500 15500 45
170M4689 170M4739 200 3800 22500 30000 50
170M4690 170M4740 250 7750 46000 61500 60
170M4691 170M4741 315 15000 90000 120000 65
170M4692 170M4742 1 350 20000 125000 165000 70
170M4693 170M4743 400 29500 175000 235000 75
170M4694 170M4744 450 42000 250000 335000 80
170M4695 170M4745 500† 69500 340000 85
170M4696 170M4746 550† 95000 465000 95
170M4697 170M4747 630‡ 130000 660000 100
170M5688 170M5738 250 6500 38500 51500 65
170M5689 170M5739 280 9350 55500 74500 70
170M5690 170M5740 315 13000 77500 105000 75
170M5691 170M5741 350 16500 97500 135000 80
170M5692 170M5742 400 23000 140000 180000 85
170M5693 170M5743 450 34000 205000 270000 90
170M5694 170M5744 2 500 48000 285000 380000 95
170M5695 170M5745 550 62000 370000 495000 100
170M5696 170M5746 630 115000 575000 730000 110
170M5697 170M5747 700† 160000 795000 115
170M5698 170M5748 800† 245000 1200000 120
170M5699 170M5749 900‡ 360000 1750000 125
170M5700 170M5750 1000‡ 480000 2350000 135
170M6688 170M6738 315 9500 58000 77500 185
170M6689 170M6739 350 13500 81500 110000 90
170M6690 170M6740 400 19500 120000 160000 95
170M6691 170M6741 450 31000 185000 245000 100
170M6692 170M6742 500 39000 235000 310000 105
170M6693 170M6743 550 55000 325000 435000 110
170M6694 170M6744 3 630 83500 495000 665000 115
170M6695 170M6745 700 115000 705000 940000 120
170M6696 170M6746 800 205000 995000 1300000 125
170M6697 170M6747 900 305000 1500000 1900000 130
170M6698† 170M6748† 1000¥ 450000 2150000 135
170M6699† 170M6749† 1100¥ 575000 2800000 140
170M6700‡ 170M6750‡ 1250¥ 810000 3950000 145
170M6701‡ 170M6751‡ 1400¥ 1250000 6000000 150
†Rated voltage (IEC) 1100.
‡Rated voltage (IEC) 1000V.
¥ UL Recognition at 1000V.
• Watts loss provided at rated current.
• Microswitch indicator ordered separately. See accessories on pages 185-186.
• For fuse curves see pages 166 and 167.
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
High Speed
Fuses
High Speed Fuses
Catalog Numbers
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
High Speed Fuses
166
Square Body Size 1*, 1 — 1250V/1300V (IEC/UL):
50-1400A
Size 1* — 50-400A:1250V
Time-Current Cur ve
1x102103104105106
2x102
103
104
105
Prospective Short-Circuit Current Symmetrical RMS
Peak Let-Through Current
50A
63A
80A
100A
125A
160A
200A
250A
315A
350A
400A
A
B
Peak Let-Through Curve
1x102 103 104 105
1x10–4
10–3
10–2
10–1
100
101
102
103
104
Prospective Current In Amp RMS
Virtual Pre-Arcing Time In Seconds
A
A
160A
200A
250A
315A 350A
400A 450A
500A 550A
630A
Size 1 — 160-630A: 1250V
Time-Current Cur ve
1x102103104105106
2x102
103
104
105
Prospective Short-Circuit Current Symmetrical RMS
Peak Let-Through In Amperes
160A
200A
250A
315A 350A
400A 450A
500A 550A
630A
A
B
Peak Let-Through Curve
630A fuse is derated to 1100V (IEC).
Data Sheet: 17056630 Data Sheet: 17056632
167
Square Body Size 2, 3 — 1250V/1300V (IEC/UL):
50-1400A
1x102 103 104 105
1x10–4
10–3
10–2
10–1
100
101
102
103
104
Prospective Current In Amp RMS
Virtual Pre-Arcing Time In Seconds
250A 280A
315A 350A
400A 450A
500A 550A
630A 700A
800A 900A
1000A
A
A
Size 2 — 250-1000A: 1250V
Time-Current Cur ve
1x102103104 105 106
2x102
103
104
105
Prospective Short-Circuit Current Symmetrical RMS
Peak Let-Through Current
250A 280A
315A 350A
400A 450A
500A 550A
630A 700A
800A 900A
1000A
A
B
Peak Let-Through Curve
900-1000A fuses are derated to 1100V (IEC).
Size 3 — 315-1400A: 1250V
Time-Current Cur ve
1x102103104105 106
2x102
103
104
105
Prospective Short-Circuit Current Symmetrical RMS
Peak Let-Through Current
315A 350A
400A 450A
500A 550A
630A 700A
800A 900A
1000A 1100A
1250A
1400A
A
B
Peak Let-Through Curve
1250-1400A fuses are derated to 1100V (IEC).
Data Sheet: 17056634 Data Sheet: 17056636
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
High Speed
Fuses
High Speed Fuses
