High Speed Fuses
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: —
—
Amps: —
IR: —
1250Vac (IEC)
1300Vac (UL)
50-1400A
100kA RMS Sym.
Arc Voltage
This curve gives the peak
arc voltage, UL, which may
1.8
1.4
appear across the fuse
during its operation as a
10
3
8
function of the applied
working voltage, Eg, (rms)
6
at a power factor of 15%.
5
4
3
2.5
UL
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.
3
400
1.0
K
p
0.8
0.6
0.5
600
800
E
g
1000 1200 1400
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 I
2
t
The total clearing I
2
t at rated
voltage and at power factor
of 15% are given in the elec-
trical 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, Eg, (rms).
1.5
K
1.25
1.0
High Speed
Fuses
0.4
0.3
0.2
0.1
30 40 50
60
70
I
b
80 90 100%
0.5
0.4
0.3
0.2
E
g
400 600 800 1000 1200 1400
Dashed lines (- - - - - -) apply to the
following amperages:.
Size
Amps.
1*
400A
1
500-630A
2
630-1000A
3
800-1400A
Features and Benefits
• Excellent dc performance
• Low arc voltage and low energy let-through (I
2
t)
• Low watts loss
• Superior cycling capability
Typical Applications
• DC common bus
• DC drives
• Power converters/rectifiers
• Reduced voltage starters
Dimensions (mm)
Type -BKN/-, -GKN/-
Size
1*
1*
1
1
2
2
2
3
3
3
Type
BKN + GKN/75
BKN/80
BKN + GKN/75
BKN/80
BKN + GKN/75
BKN/80
BKN + GKN/90
BKN + GKN/75
BKN/80
BKN + GKN/90
A
74
80
74
80
74
80
80
74
81
81
B
75
81
75
81
75
81
91
76
83
91
D
59
59
69
69
77
77
77
92
92
92
E
45
45
53
53
61
61
61
76
76
76
F
M8
M8
M8
M8
M10
M10
M10
M12
M12
M12
F** (in)
5
⁄
16
” - 18 UNC-2B
5
⁄
16
” - 18 UNC-2B
⁄
8
” - 16 UNC-2B
⁄
8
” - 16 UNC-2B
⁄
2
” - 13 UNC-2B
⁄
2
” - 13 UNC-2B
D
E
3
3
1
1
G
5
5
8
8
10
10
10
10
10
10
H
Ø17
Ø17
Ø20
Ø20
Ø24
Ø24
Ø24
Ø30
Ø30
Ø30
B
**Valid for fuses type -GKN/-.
1mm = 0.0394” / 1” = 25.4mm
A
F
E
H
G
For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp
159
High Speed Fuses
Square body flush end contact — 1250V/1300V (IEC/UL):
50-1400A
Catalog Numbers
Catalog Numbers
-BKN/75
-BKN/80
Type K
Type K
Indicator
Indicator
for Micro
for Micro
170M3388
170M3438
170M3389
170M3439
170M3390
170M3440
170M3391
170M3441
170M3392
170M3442
170M3393
170M3443
170M3394
170M3444
170M3395
170M3445
170M3396
170M3446
170M3397
170M3447
170M3448
170M4388
170M4438
170M4389
170M4439
170M4390
170M4440
170M4391
170M4441
170M4392
170M4442
170M4393
170M4443
170M4394
170M4444
†170M4395 170M4445
‡170M4396 170M4446
‡170M4397 †170M4447
170M5388
170M5438
170M5389
170M5439
170M5390
170M5440
170M5391
170M5441
170M5392
170M5442
170M5393
170M5443
170M5394
170M5444
170M5395
170M5445
†170M5396 170M5446
‡170M5397 †170M5447
‡170M5398 ‡170M5448
-BKN/90
Type K
Indicator
for Micro
-GKN/75
Type K
Indicator
for Micro
170M3488
170M3489
170M3490
170M3491
170M3492
170M3493
170M3494
170M3495
170M3496
170M3497
170M4488
170M4489
170M4490
170M4491
170M4492
170M4493
170M4494
†170M4495
‡170M4496
‡170M4497
170M5588
170M5589
170M5590
170M5591
170M5592
170M5593
170M5594
170M5595
†170M5596
‡170M5597
‡170M5598
-GKN/90
Type K
Indicator
for Micro
Electrical Characteristics
Rated
Current
I2t (A2 Sec)
RMS-
Clearing
Clearing
Size Amps
Pre-arc
at 1000V
at 1250V
1*
50
135
815
1100
63
215
1300
1750
80
420
2500
3350
100
750
4450
5950
125
1450
9000
11500
160
2600
16000
21000
200
5150
31000
41000
250
9200
54500
73000
315
18500
115000
150000
350
27000
165000
220000
400
53000
265000
335000
1
160
1900
11500
15500
200
3800
22500
30000
250
7750
46000
61500
315
15000
90000
120000
350
20000
125000
165000
400
29500
175000
235000
450
42000
250000
335000
500
69500
340000
435000
550
95000
465000
590000
630
130000
660000
2
250
6500
38500
51500
280
9350
55500
74500
315
13000
77500
105000
350
16500
97500
135000
400
23000
140000
180000
450
34000
205000
270000
500
48000
285000
380000
550
62000
370000
495000
630
115000
575000
730000
700
160000
795000
1050000
800
245000
1200000
1550000
†900
360000
1750000
†1000
480000
2350000
3
315
9500
58000
77500
350
13500
81500
110000
400
19500
120000
160000
450
31000
185000
245000
500
39000
235000
310000
550
55000
325000
435000
630
83500
495000
665000
700
115000
705000
940000
800
205000
995000
1300000
900
305000
1500000
1900000
1000
450000
2150000
2750000
1100
575000
2800000
3600000
†1250
810000
3950000
†1400 1250000
6000000
170M5494
170M5495
170M5496
170M5497
170M5498
170M5499
170M5500
170M5644
170M5645
170M5646
170M5647
170M5648
170M5649
170M5650
170M6338
170M6339
170M6340
170M6341
170M6342
170M6343
170M6344
170M6345
†170M6346
‡170M6347
‡170M6348
‡170M6349
170M6538
170M6539
170M6540
170M6541
170M6542
170M6543
170M6544
170M6545
170M6546
†170M6547
†170M6548
‡170M6549
170M6494
170M6495
¥170M6496
¥170M6497
¥170M6498
¥170M6499
170M6500
170M6501
170M6588
170M6589
170M6590
170M6591
170M6592
170M6593
170M6594
170M6595
†170M6596
‡170M6597
‡170M6598
‡170M6599
170M6644
170M6645
¥170M6646
¥170M6647
¥170M6648
¥170M6649
170M6650
170M6651
Watts
Loss
15
20
25
30
35
40
45
55
60
65
70
45
50
60
65
70
75
80
85
95
100
65
70
75
80
85
90
95
100
110
115
120
125
135
85
90
95
100
105
110
115
120
125
130
135
140
145
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.
160
For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp
High Speed Fuses
Square body flush end contact — 1250V/1300V (IEC/UL):
50-1400A
Size 1* — 50-400A:1250V
Time-Current Curve
Size 1 — 160-630A: 1250V
Time-Current Curve
160A
200A
250A
315A
350A
400A
450A
500A 550A
630A
A
Virtual Pre-Arcing Time In Seconds
10
1
A
10
4
10
3
10
2
High Speed
Fuses
10
0
10
–1
10
–2
10
–3
1x10
–4
1x10
2
10
3
10
4
Prospective Current In Amperes RMS
10
5
Peak Let-Through Curve
10
5
B
Peak Let-Through Curve
10
5
B
630A
550A
500A
450A
400A
350A
315A
250A
200A
160A
10
4
Peak Let-Through Current
10
4
Peak Let-Through In Amperes
400A
350A
315A
250A
200A
160A
125A
100A
80A
63A
50A
10
3
10
3
A
2x10
2
1x10
2
10
3
10
4
10
5
Prospective Short-Circuit Current Symmetrical RMS
10
6
2x10
2
A
1x10
2
10
3
10
4
10
5
Prospective Short-Circuit Current Symmetrical RMS
10
6
630A fuse is derated to 1100V (IEC).
Data Sheet: 17056630
Data Sheet: 17056632
For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp
161
High Speed Fuses
Square body flush end contact — 1250V/1300V (IEC/UL):
50-1400A
Size 2 — 250-1000A: 1250V
Time-Current Curve
250A
280A
315A 350A
400A
450A
500A 550A
630A
700A
800A
900A
1000A
Size 3 — 315-1400A: 1250V
Time-Current Curve
10
4
10
3
10
2
A
Virtual Pre-Arcing Time In Seconds
A
10
1
10
0
10
–1
10
–2
10
–3
1x10
–4
1x10
2
10
3
10
4
Prospective Current In Amperes RMS
10
5
Peak Let-Through Curve
10
5
Peak Let-Through Curve
10
5
1400A
B
Peak Let-Through Current
Peak Let-Through Current
1000A
900A
800A
700A
630A
550A
500A
450A
400A
315A 350A
280A
250A
B
1250A
1100A
1000A
900A
800A
700A
630A
550A
500A 450A
400A
350A
315A
10
4
10
4
10
3
10
3
A
A
2x10
2
2x10
2
1x10
2
10
3
10
4
10
5
Prospective Short-Circuit Current Symmetrical RMS
10
6
1x10
2
10
3
10
4
10
5
Prospective Short-Circuit Current Symmetrical RMS
10
6
900-1000A fuses are derated to 1100V (IEC).
1250-1400A fuses are derated to 1100V (IEC).
Data Sheet: 17056634
Data Sheet: 17056636
162
For product data sheets, visit www.cooperbussmann.com/products/datasheet.asp
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