®
Bu s s m a n n
Square Body – Flus h End Contact
1250V/1300V (IEC/U.L.) 50-1400A
®
Electrical Characteristics
Ordering Information
Rated
Current
-BKN/75
Type K
-BKN/80
Type K
-BKN/90
Type K
-GKN/75
Type K
-GKN/90
Type K
I2t (A2S)
RMS-
Size Amps
Clearing
Pre-arc at 1000V at 1250V
Clearing
Watts
Loss
Indicator
for Micro
Indicator
for Micro
Indicator
for Micro
Indicator
for Micro
Indicator
for Micro
50
63
80
100
125
160
200
250
315
350
400
135
215
420
815
1300
2500
4450
9000
16000
31000
54500
115000
165000
265000
1100
1750
3350
15
20
25
30
35
40
45
55
60
65
70
170M3388
170M3389
170M3390
170M3391
170M3392
170M3393
170M3394
170M3395
170M3396
170M3397
170M3438
170M3439
170M3440
170M3441
170M3442
170M3443
170M3444
170M3445
170M3446
170M3447
170M3448
170M3488
170M3489
170M3490
170M3491
170M3492
170M3493
170M3494
170M3495
170M3496
170M3497
750
5950
1450
2600
5150
9200
18500
27000
53000
11500
21000
41000
73000
150000
220000
335000
1*
160
200
250
315
350
400
450
500
550
630
1900
3800
7750
15000
20000
29500
42000
69500
95000
130000
11500
22500
46000
15500
30000
61500
120000
165000
235000
335000
435000
590000
45
50
60
65
70
75
80
85
95
170M4388
170M4389
170M4390
170M4391
170M4392
170M4393
170M4394
†170M4395
‡170M4396
170M4438
170M4439
170M4440
170M4441
170M4442
170M4443
170M4444
170M4445
170M4446
170M4488
170M4489
170M4490
170M4491
170M4492
170M4493
170M4494
†170M4495
‡170M4496
‡170M4497
90000
1
125000
175000
250000
340000
465000
660000
100
‡170M4397 †170M4447
250
280
315
350
400
450
500
550
630
700
800
†900
†1000
6500
9350
38500
55500
77500
51500
74500
65
70
75
80
85
170M5388
170M5389
170M5390
170M5391
170M5392
170M5393
170M5394
170M5395
†170M5396
170M5438
170M5439
170M5440
170M5441
170M5442
170M5443
170M5444
170M5445
170M5446
170M5588
170M5589
170M5590
170M5591
170M5592
170M5593
170M5594
170M5595
†170M5596
‡170M5597
‡170M5598
13000
16500
23000
34000
48000
62000
115000
160000
245000
360000
480000
105000
135000
180000
270000
380000
495000
730000
1050000
1550000
97500
140000
205000
285000
370000
575000
795000
1200000
1750000
2350000
90
95
2
170M5494
170M5495
170M5496
170M5497
170M5498
170M5499
170M5500
170M5644
170M5645
170M5646
170M5647
170M5648
170M5649
170M5650
100
110
115
120
125
135
‡170M5397 †170M5447
‡170M5398 ‡170M5448
315
350
400
450
500
550
630
700
800
9500
13500
19500
31000
39000
58000
81500
77500
110000
160000
245000
310000
435000
665000
940000
1300000
1900000
2750000
3600000
85
90
95
170M6338
170M6339
170M6340
170M6341
170M6342
170M6343
170M6344
170M6345
†170M6346
170M6538
170M6539
170M6540
170M6541
170M6542
170M6543
170M6544
170M6545
170M6546
170M6588
170M6589
170M6590
170M6591
170M6592
170M6593
170M6594
170M6595
†170M6596
‡170M6597
‡170M6598
‡170M6599
120000
185000
235000
325000
495000
705000
995000
1500000
2150000
2800000
3950000
6000000
100
105
110
115
120
125
130
135
140
145
150
55000
83500
170M6494
170M6495
170M6496
170M6497
170M6498
170M6499
170M6500
170M6501
170M6644
170M6645
170M6646
170M6647
170M6648
170M6649
170M6650
170M6651
3
115000
205000
305000
450000
575000
810000
1250000
900
‡170M6347 †170M6547
‡170M6348 †170M6548
‡170M6349 ‡170M6549
1000
1100
†1250
†1400
Ⅲ Interrupting rating 100kA RMS Symmetrical.
Ⅲ Watts loss provided at rated current.
1 kg = 2.2 lbs.
1 lb = 0.45 kg
Ⅲ Rated voltage (IEC) †1100V ‡1000V (Consult Bussmann for U.L. Recognition status.)
Ⅲ Individual Fuse Weight: Size 1* = 0.380 kg
Size 1 = 0.580 kg
Size 2 = 0.900 kg
Size 3 = 1.250 kg
Ⅲ Microswitch indicator ordered separately.
Form No.
Page 1 of 2
1-17-01
BIF Doc #720031
SB00233
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