For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp 159
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 correc-
tion 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 — 1250V/1300V (IEC/UL):
50-1400A
1250V/1300V (IEC/UL) 50-1400A
Specifications
Description: Square body flush
end contact high speed fuses.
Dimensions: See dimensions
illustrations.
Ratings:
Volts: — 1250Vac (IEC)
— 1300Vac (UL)
Amps: — 50-1400A
IR: — 100kA RMS Sym.
Agency Information: 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 elec-
trical 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).
A
B
D
E
EH
G
F
Dimensions (mm)
Type -BKN/-, -GKN/-
Size Type A B D E F F** (in) G H
1* BKN + GKN/75 74 75 59 45 M8 5⁄16” - 18 UNC-2B 5 Ø17
1* BKN/80 80 81 59 45 M8 5 Ø17
1 BKN + GKN/75 74 75 69 53 M8 5⁄16” - 18 UNC-2B 8 Ø20
1 BKN/80 80 81 69 53 M8 8 Ø20
2 BKN + GKN/75 74 75 77 61 M10 3⁄8” - 16 UNC-2B 10 Ø24
2 BKN/80 80 81 77 61 M10 10 Ø24
2 BKN + GKN/90 80 91 77 61 M10 3⁄8” - 16 UNC-2B 10 Ø24
3 BKN + GKN/75 74 76 92 76 M12 1⁄2” - 13 UNC-2B 10 Ø30
3 BKN/80 81 83 92 76 M12 10 Ø30
3 BKN + GKN/90 81 91 92 76 M12 1⁄2” - 13 UNC-2B 10 Ø30
**Valid for fuses type -GKN/-.
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:.
Size Amps.
1* 400A
1 500-630A
2 630-1000A
3 800-1400A
For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp
160
High Speed Fuses
Square body flush end contact — 1250V/1300V (IEC/UL):
50-1400A
Catalog Numbers
Catalog Numbers Electrical Characteristics
-BKN/75 -BKN/80 -BKN/90 -GKN/75 -GKN/90 Rated
Type K Type K Type K Type K Type K Current I2t (A2 Sec)
Indicator Indicator Indicator Indicator Indicator RMS- Clearing Clearing Watts
for Micro for Micro for Micro for Micro for Micro Size Amps Pre-arc at 1000V at 1250V Loss
170M3388 170M3438 170M3488 1* 50 135 815 1100 15
170M3389 170M3439 170M3489 63 215 1300 1750 20
170M3390 170M3440 170M3490 80 420 2500 3350 25
170M3391 170M3441 170M3491 100 750 4450 5950 30
170M3392 170M3442 170M3492 125 1450 9000 11500 35
170M3393 170M3443 170M3493 160 2600 16000 21000 40
170M3394 170M3444 170M3494 200 5150 31000 41000 45
170M3395 170M3445 170M3495 250 9200 54500 73000 55
170M3396 170M3446 170M3496 315 18500 115000 150000 60
170M3397 170M3447 170M3497 350 27000 165000 220000 65
170M3448 400 53000 265000 335000 70
170M4388 170M4438 170M4488 1 160 1900 11500 15500 45
170M4389 170M4439 170M4489 200 3800 22500 30000 50
170M4390 170M4440 170M4490 250 7750 46000 61500 60
170M4391 170M4441 170M4491 315 15000 90000 120000 65
170M4392 170M4442 170M4492 350 20000 125000 165000 70
170M4393 170M4443 170M4493 400 29500 175000 235000 75
170M4394 170M4444 170M4494 450 42000 250000 335000 80
†170M4395 170M4445 †170M4495 500 69500 340000 435000 85
‡170M4396 170M4446 ‡170M4496 550 95000 465000 590000 95
‡170M4397 †170M4447 ‡170M4497 630 130000 660000 100
170M5388 170M5438 170M5588 2 250 6500 38500 51500 65
170M5389 170M5439 170M5589 280 9350 55500 74500 70
170M5390 170M5440 170M5590 315 13000 77500 105000 75
170M5391 170M5441 170M5591 350 16500 97500 135000 80
170M5392 170M5442 170M5592 400 23000 140000 180000 85
170M5393 170M5443 170M5593 450 34000 205000 270000 90
170M5394 170M5444 170M5494 170M5594 170M5644 500 48000 285000 380000 95
170M5395 170M5445 170M5495 170M5595 170M5645 550 62000 370000 495000 100
†170M5396 170M5446 170M5496 †170M5596 170M5646 630 115000 575000 730000 110
‡170M5397 †170M5447 170M5497 ‡170M5597 170M5647 700 160000 795000 1050000 115
‡170M5398 ‡170M5448 170M5498 ‡170M5598 170M5648 800 245000 1200000 1550000 120
170M5499 170M5649 †900 360000 1750000 125
170M5500 170M5650 †1000 480000 2350000 135
170M6338 170M6538 170M6588 3 315 9500 58000 77500 85
170M6339 170M6539 170M6589 350 13500 81500 110000 90
170M6340 170M6540 170M6590 400 19500 120000 160000 95
170M6341 170M6541 170M6591 450 31000 185000 245000 100
170M6342 170M6542 170M6592 500 39000 235000 310000 105
170M6343 170M6543 170M6593 550 55000 325000 435000 110
170M6344 170M6544 170M6494 170M6594 170M6644 630 83500 495000 665000 115
170M6345 170M6545 170M6495 170M6595 170M6645 700 115000 705000 940000 120
†170M6346 170M6546 ¥170M6496 †170M6596 ¥170M6646 800 205000 995000 1300000 125
‡170M6347 †170M6547 ¥170M6497 ‡170M6597 ¥170M6647 900 305000 1500000 1900000 130
‡170M6348 †170M6548 ¥170M6498 ‡170M6598 ¥170M6648 1000 450000 2150000 2750000 135
‡170M6349 ‡170M6549 ¥170M6499 ‡170M6599 ¥170M6649 1100 575000 2800000 3600000 140
170M6500 170M6650 †1250 810000 3950000 145
170M6501 170M6651 †1400 1250000 6000000 150
†Rated voltage (IEC) 1100V.
‡Rated voltage (IEC) 1000V.
¥Rated voltage (IEC) 1250V.
• Watts loss provided at rated current.
• Microswitch indicator ordered separately. See accessories on pages 179-180.
For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp 161
High Speed Fuses
High Speed
Fuses
Square body flush end contact — 1250V/1300V (IEC/UL):
50-1400A
Size 1* — 50-400A:1250V
Time-Current Curve
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
1x102103104105
1x10–4
10–3
10–2
10–1
100
101
102
103
104
Prospective Current In Amperes RMS
Virtual Pre-Arcing Time In Seconds
A
A
160A
200A
250A
315A350A
400A450A
500A550A
630A
Size 1 — 160-630A: 1250V
Time-Current Curve
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
For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp
162
High Speed Fuses
Square body flush end contact — 1250V/1300V (IEC/UL):
50-1400A
1x102103104105
1x10–4
10–3
10–2
10–1
100
101
102
103
104
Prospective Current In Amperes 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 Curve
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 Curve
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
