Bussmann
Square Body – Flush End Contact
®
1250V/1300V (IEC/U.L.)
Electrical Characteristics
Rated
Current
RMS-
Size Amps
Pre-arc
50
135
63
215
80
420
100
750
125
1450
1*
160
2600
200
5150
250
9200
315
18500
350
27000
400
53000
160
1900
200
3800
250
7750
315
15000
1
350
20000
400
29500
450
42000
500
69500
550
95000
630
130000
250
6500
280
9350
315
13000
350
16500
400
23000
450
34000
2
500
48000
550
62000
630
115000
700
160000
800
245000
†900
360000
†1000
480000
315
9500
350
13500
400
19500
450
31000
500
39000
550
55000
630
83500
3
700
115000
800
205000
900
305000
1000
450000
1100
575000
†1250
810000
†1400
1250000
I
2
t (A
2
S)
50-1400A
Ordering Information
-BKN/80
-BKN/90
-GKN/75
Type K
Type K
Type K
Indicator
Indicator
Indicator
for Micro
for Micro
for Micro
170M3438
170M3488
170M3439
170M3489
170M3440
170M3490
170M3441
170M3491
170M3442
170M3492
170M3443
170M3493
170M3444
170M3494
170M3445
170M3495
170M3446
170M3496
170M3447
170M3497
170M3448
170M4438
170M4488
170M4439
170M4489
170M4440
170M4490
170M4441
170M4491
170M4442
170M4492
170M4443
170M4493
170M4444
170M4494
170M4445
†170M4495
170M4446
‡170M4496
†170M4447
‡170M4497
170M5438
170M5588
170M5439
170M5589
170M5440
170M5590
170M5441
170M5591
170M5442
170M5592
170M5443
170M5593
170M5444
170M5494
170M5594
170M5445
170M5495
170M5595
170M5446
170M5496
†170M5596
†170M5447
170M5497
‡170M5597
‡170M5448
170M5498
‡170M5598
170M5499
170M5500
170M6538
170M6588
170M6539
170M6589
170M6540
170M6590
170M6541
170M6591
170M6542
170M6592
170M6543
170M6593
170M6544
170M6494
170M6594
170M6545
170M6495
170M6595
¥
170M6496
†170M6596
170M6546
¥
170M6497
‡170M6597
†170M6547
¥
170M6498
‡170M6598
†170M6548
¥
170M6499
‡170M6599
‡170M6549
170M6500
170M6501
R
®
Curves
-GKN/90
Type K
Indicator
for Micro
Clearing
at 1000V
815
1300
2500
4450
9000
16000
31000
54500
115000
165000
265000
11500
22500
46000
90000
125000
175000
250000
340000
465000
660000
38500
55500
77500
97500
140000
205000
285000
370000
575000
795000
1200000
1750000
2350000
58000
81500
120000
185000
235000
325000
495000
705000
995000
1500000
2150000
2800000
3950000
6000000
Clearing
at 1250V
1100
1750
3350
5950
11500
21000
41000
73000
150000
220000
335000
15500
30000
61500
120000
165000
235000
335000
435000
590000
51500
74500
105000
135000
180000
270000
380000
495000
730000
1050000
1550000
77500
110000
160000
245000
310000
435000
665000
940000
1300000
1900000
2750000
3600000
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
-BKN/75
Type K
Indicator
for Micro
170M3388
170M3389
170M3390
170M3391
170M3392
170M3393
170M3394
170M3395
170M3396
170M3397
170M4388
170M4389
170M4390
170M4391
170M4392
170M4393
170M4394
†170M4395
‡170M4396
‡170M4397
170M5388
170M5389
170M5390
170M5391
170M5392
170M5393
170M5394
170M5395
†170M5396
‡170M5397
‡170M5398
BIF #
17056630
17056632
170M5644
170M5645
170M5646
170M5647
170M5648
170M5649
170M5650
17056634
170M6338
170M6339
170M6340
170M6341
170M6342
170M6343
170M6344
170M6345
†170M6346
‡170M6347
‡170M6348
‡170M6349
170M6644
170M6645
¥
170M6646
¥
170M6647
¥
170M6648
¥
170M6649
170M6650
170M6651
17056636
Interrupting rating 100kA RMS Symmetrical.
1 kg = 2.2 lbs.
Watts loss provided at rated current.
Rated voltage (IEC) †1100V ‡1000V
¥
1250V (Consult Bussmann for U.L. Recognition/ CSA Component Acceptance status.)
Individual Fuse Weight: Size 1* = 0.380 kg
Size 1 = 0.580 kg
Size 2 = 0.900 kg
Size 3 = 1.250 kg
Microswitch indicator ordered separately.
1 lb = 0.45 kg
7-11-01
SB01191
Form No.
Page 1 of 2
BIF Doc #720031
Bussmann
Square Body – Flush End Contact
®
¥
1250V/1300V (IEC/U.L.)
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
electrical characteristics. For other volt-
ages, the clearing I
2
t is found by multi-
plying by correction factor, K, given as
a function of applied working voltage,
E
g
, (RMS).
1.5
K
1.25
1.0
50-1400A
R
®
Arc Voltage
This curve gives the peak arc voltage,
U
L
, which may appear across the fuse
during its operation as a function of the
applied working voltage, E
g
, (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, K
p
,
is given as a function of the RMS load
current, I
b
, in % of the rated current .
1.0
K
p
0.8
0.6
0.5
0.4
3
2.5
1.8
1.4
UL
0.5
0.4
0.3
0.2
E
g
400
600
800
1000 1200 1400
10
3
8
6
5
4
3
400
600
800
E
g
1000 1200 1400
0.3
0.2
0.1
30 40 50
60
70
I
b
80 90 100%
------
Dashed lines apply to the following amperages:
Size
Amp
1*
400
1
500-630
2
630-1000
3
800-1400
Dimensions
Flush End Contact: Type -BKN/-, -GKN/-
B
D
E
A
F
E
H
G
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
§
fiΩ¡§∑ - 18 UNC-2B
fiΩ¡§∑ - 18 UNC-2B
‹Ω•∑ - 16 UNC-2B
‹Ω•∑ - 16 UNC-2B
⁄Ω™∑ - 13 UNC-2B
⁄Ω™∑ - 13 UNC-2B
G
5
5
8
8
10
10
10
10
10
10
H
Ø17
Ø17
Ø20
Ø20
Ø24
Ø24
Ø24
Ø30
Ø30
Ø30
Valid for fuses type -GKN/-
Dimension in mm.
1mm = 0.0394∑
1∑ = 25.4mm
The only controlled copy of this BIF document is the electronic read-only version located on the Bussmann Network Drive. All other copies of this document are by definition uncontrolled.
This bulletin is intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Bussmann reserves the right,
without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without
notice, any technical information contained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.
7-11-01
SB01191
Form No.
Page 2 of 2
BIF Doc #720031
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