For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp 155
High Speed Fuses
High Speed
Fuses
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 flush end contact — 1000V (IEC): 50–1400A
1000V (IEC) 50–1400A
Specifications
Description: Square body flush
end contact high speed fuses.
Dimensions: See dimensions
illustration.
Ratings:
Volts: — 1000Vac.
Amps: — 50-1400A
IR: — 150kA (Est.300kA) RMS Sym.
Agency Information: CE, Designed and tested to IEC
60269: Part 4, UL Recognized.
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).
1,5
1,0
0,5
0,4
0,3
0,2
K
Eg
500 600 700 800 900 1000
*Rated voltage 900V
*
3
2,5
2
1,8
1,6
1,4
1,2
103
8
7
6
5
4
3
UL
Eg
500 600 700 800 900 1000
Dimensions (mm)
Type –BKN/- and –GKN/-
Size Size A B Max D E F F** (in) Min G H
1* BKN/75+GKN/75 72.5 74 61 43 M8 5⁄16” – 18 UNC-2B 5 ø17.5
1 BKN/75+GKN/75 73.2 74 69 52 M8 5⁄16” – 18 UNC-2B 8 ø20
2 BKN/75+GKN/75 73.2 74.4 77 59 M10 3⁄8” – 16 UNC-2B 10 ø24
3 BKN/75+GKN/75 73.3 75.4 92 74 M12 1⁄2” – 13 UNC-2B 10 ø30
3 BKN/90+GKN/90 80.3 91.4 92 74 M12 1⁄2” – 13 UNC-2B 10 ø30
** Valid for fuses type –GKN/-.
1mm = 0.0394” / 1” = 25.4mm
1,0
0,8
0,7
0,6
0,5
0,4
0,3
0,2
0,15
0,1
Kp
Ib
30 40 50 60 70 80 90 100%
For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp
156
High Speed Fuses
Square body flush end contact — 1000V (IEC): 50–1400A
Catalog Numbers
Catalog Numbers Electrical Characteristics
-BKN/- -GKN/- I2t (A2Sec)
Type K Type K Rated Clearing
Indicator for Indicator for Rated Current at Rated Watts
Micro Micro Size Voltage RMS-Amps Pre-arc Voltage Loss
170M3951 170M3921 1* 1000 50 135 815 20
170M3952 170M3922 1000 63 215 1300 25
170M3953 170M3923 1000 80 460 2750 30
170M3954 170M3924 1000 100 860 5100 35
170M3955 170M3925 1000 125 1450 8600 40
170M3956 170M3926 1000 160 2850 17500 45
170M3957 170M3927 1000 200 4950 29500 48
170M3958 170M3928 1000 250 9550 57000 50
170M3959 170M3929 1000 315 21500 130000 60
170M3960 170M3930 1000 350 29000 175000 65
170M3961 170M3931 1000 400 42000 250000 70
170M4951 170M4921 1 1000 160 2200 13500 40
170M4952 170M4922 1000 200 4150 24500 45
170M4953 170M4923 1000 250 7750 46000 52
170M4954 170M4924 1000 315 16500 98500 60
170M4955 170M4925 1000 350 21500 130000 65
170M4956 170M4926 1000 400 31000 185000 70
170M4957 170M4927 1000 450 44500 265000 80
170M4958 170M4928 1000 500 63000 375000 85
170M4959 170M4929 1000 550 84500 500000 90
170M4960 170M4930 1000 630 125000 755000 98
170M5952 170M5922 2 1000 250 6750 40000 65
170M5953 170M5923 1000 315 13500 81500 75
170M5954 170M5924 1000 350 16500 99000 80
170M5955 170M5925 1000 400 26000 155000 85
170M5956 170M5926 1000 450 35500 210000 90
170M5957 170M5927 1000 500 49500 295000 95
170M5958 170M5928 1000 550 66000 390000 100
170M5959 170M5929 1000 630 93500 555000 110
170M5960 170M5930 1000 700 130000 770000 115
170M5961 170M5931 1000 800 195000 1200000 125
170M8600 170M8500 3 1000 315 9200 54500 90
170M8601 170M8501 1000 350 13000 77500 95
170M8602 170M8502 1000 400 19000 115000 105
170M8603 170M8503 1000 450 27000 160000 107
170M8604 170M8504 1000 500 37500 225000 110
170M8605 170M8505 1000 550 52000 310000 115
170M8606 170M8506 1000 630 82500 490000 120
170M8607 170M8507 1000 700 115000 700000 125
170M8608 170M8508 1000 800 170000 1050000 135
170M8609 170M8509 1000 900 250000 1500000 145
170M8610 170M8510 1000 1000 340000 2050000 150
170M8611 170M8511 1000 1100 460000 2750000 155
170M8612** 170M8512** 1000 1250 575000 3400000 175
170M8613** 170M8513** 900 1400 795000 4200000 185
**Overall length is 90mm, for all other fuses the overall length is 75mm.
• Watts loss provided at rated current.
• Microswitch ordered separately. See accessories on page 179-180.
For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp 157
High Speed Fuses
High Speed
Fuses
Square body flush end contact — 1000V (IEC): 50–1400A
1s
10-1
10-2
10-3
10-4
Virtual Pre-arcing Time In Seconds
Prospective Current In Ampere RMS
5x101 102 103 104 5x104
50A
80A
125A
200A
315A
400A
350A
63A
160A
250A
100A
105
104
103
2x102
Peak Let-Through Current In Amperes
Prospective Short-Circuit Current symmetrical RMS
102 103 104 105 Amp 106
400A
350A315A
250A
200A
160A
50A
630A
80A
100A
125A
Size 1* — 50-400A: 1000V
Time-Current Curve
Peak Let-Through Curve
104
103
102
10
1s
10-1
10-2
10-3
10-4
Virtual Pre-arcing Time In Seconds
Prospective Current In Ampere RMS
102 103 104 105
200A
315A
400A
500A
630A
160A
350A
250A
450A
550A
105
104
103
2x102
Peak Let-Through Current In Amperes
Prospective Short-Circuit Current symmetrical RMS
102 103 104 105 Amp 106
550A
500A 450A
400A 350A
315A
630A
160A
200A
250A
Size 1 — 160-630A: 1000V
Time-Current Curve
Peak Let-Through Curve
Data Sheet: 17058564 Data Sheet: 17058566
For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp
158
High Speed Fuses
Square body flush end contact — 1000V (IEC): 50–1400A
Size 2 — 250-800A: 1000V
Time-Current Curve
Peak Let-Through Curve
104
103
102
10
1s
10-1
10-2
10-3
10-4
Virtual Pre-arcing Time In Seconds
Prospective Current In Ampere RMS
102 103 104 105
250A
350A
550A
700A
315A
500A
400A
630A
800A
450A
105
104
103
2x102
Peak Let-Through Current In Amperes
Prospective Short-Circuit Current symmetrical RMS
102 103 104 105 Amp 106
700A
800A
630A
500A 550A
450A
250A
315A 350A
400A
104
103
102
10
1s
10-1
10-2
10-3
10-4
Virtual Pre-arcing Time In Seconds
Prospective Current In Ampere RMS
102 103 104 105
350A
450A
700A
900A
315A
500A
400A
630A
800A
550A
1100A
1400A*
1000A
1250A
105
104
103
2x102
Peak Let-Through Current In Amperes
Prospective Short-Circuit Current symmetrical RMS
102 103 104 105 Amp 106
1250A
1400A
*
1100A
900A 1000A
800A
500A
550A 630A
700A
450A 400A
350A 315A
Size 3 — 315-1400A: 1000V
Time-Current Curve
Peak Let-Through Curve
* 1400A fuses are derated to 900V
Data Sheet: 17058568 Data Sheet: 17058570
