High Spe e d Fus e s
Squa re Body Flus h End Conta c t — 1000V (IEC):
50–1400A
Ca ta log Num be rs
Catalog Numbers
Electrical Characteristics
I2t (A2 Sec)
-BKN/-
Type K
-GKN/-
Type K
Rated
Current
Voltage RMS-Amps Pre-arc
Clearing
at Rated
Voltage
815
Indicator for Indicator for
Rated
Watts
Loss
20
Micro
Micro
Size
170M3951
170M3952
170M3953
170M3954
170M3955
170M3956
170M3957
170M3958
170M3959
170M3960
170M3961
170M4951
170M4952
170M4953
170M4954
170M4955
170M4956
170M4957
170M4958
170M4959
170M4960
170M5952
170M5953
170M5954
170M5955
170M5956
170M5957
170M5958
170M5959
170M5960
170M5961
170M8600
170M8601
170M8602
170M8603
170M8604
170M8605
170M8606
170M8607
170M8608
170M8609
170M8610
170M8611
170M3921
170M3922
170M3923
170M3924
170M3925
170M3926
170M3927
170M3928
170M3929
170M3930
170M3931
170M4921
170M4922
170M4923
170M4924
170M4925
170M4926
170M4927
170M4928
170M4929
170M4930
170M5922
170M5923
170M5924
170M5925
170M5926
170M5927
170M5928
170M5929
170M5930
170M5931
170M8500
170M8501
170M8502
170M8503
170M8504
170M8505
170M8506
170M8507
170M8508
170M8509
170M8510
170M8511
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
900
50
135
63
215
1300
25
80
460
2750
30
100
125
160
200
250
315
350
400
160
200
250
315
350
400
450
500
550
630
250
315
350
400
450
500
550
630
700
800
315
350
400
450
500
550
630
700
800
900
1000
1100
1250
1400
860
5100
35
1450
8600
40
1*
2850
17500
45
4950
29500
48
9550
57000
50
21500
29000
42000
2200
130000
175000
250000
13500
60
65
70
40
4150
24500
45
7750
46000
52
16500
21500
31000
44500
63000
84500
125000
6750
98500
60
1
2
3
130000
185000
265000
375000
500000
755000
40000
65
70
80
85
90
98
65
13500
16500
26000
35500
49500
66000
93500
130000
195000
9200
81500
75
99000
80
155000
210000
295000
390000
555000
770000
1200000
54500
85
90
95
100
110
115
125
90
13000
19000
27000
37500
52000
82500
115000
170000
250000
340000
460000
575000
795000
77500
95
115000
160000
225000
310000
490000
700000
1050000
1500000
2050000
2750000
3400000
4200000
105
107
110
115
120
125
135
145
150
155
175
185
170M8612** 170M8512**
170M8613** 170M8513**
**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 185-186.
• For fuse curves see pages 152 and 153.
For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa
149