®
1250V/1300V (IEC/U.L.) 50-1400A R
®
Electrical Characteristics Ordering Information Curves
Size
1*
1
Rated
Current
RMS-Amps
50
63
80
100
125
160
200
250
315
350
400
160
200
250
315
350
400
450
500
550
†630
Pre-arc
1900
3800
7750
15000
20000
29500
42000
69500
95000
130000
135
215
420
750
1450
2600
5150
9200
18500
27000
53000
I 2 t (A 2 S)
Clearing at 1000V
815
1300
2500
4450
9000
16000
31000
54500
115000
165000
265000
11500
22500
46000
90000
125000
175000
250000
340000
465000
660000
Clearing at 1250V
1100
1750
3350
5950
11500
21000
41000
73000
150000
220000
335000
15500
30000
61500
120000
165000
235000
335000
435000
590000
Watts
Loss
35
40
45
55
15
20
25
30
60
65
70
70
75
80
85
45
50
60
65
95
100
-KN/110
Type K
Visual
Indicator for Micro
170M3238
170M3239
170M3240
170M3241
170M3242
170M3243
170M3244
170M3245
170M3246
170M3247
170M3248
170M4238
170M4239
170M4240
170M4241
170M4242
170M4243
170M4244
170M4245
170M4246
170M4247
Carton
Qty.
2
2
Carton
Weight
(kg)
0.84
1.26
BIF #
17056630
17056632
2
3
‡800
‡900
‡1000
‡1100
†1250
†1400
315
350
400
450
500
550
630
700
250
280
315
350
400
450
500
550
630
700
800
†900
†1000
6500
9350
13000
16500
23000
34000
48000
62000
115000
160000
245000
360000
480000
9500
13500
19500
31000
39000
55000
83500
115000
205000
305000
450000
575000
810000
1250000
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
51500
74500
105000
135000
180000
270000
380000
495000
730000
1050000
1550000
77500
110000
160000
245000
310000
435000
665000
940000
1300000
1900000
2750000
3600000
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
170M5238
170M5239
170M5240
170M5241
170M5242
170M5243
170M5244
170M5245
170M5246
170M5247
170M5248
170M5249
170M5250
170M6238
170M6239
170M6240
170M6241
170M6242
170M6243
170M6244
170M6245
170M6246
170M6247
170M6248
170M6249
170M6250
170M6251
2
1
1.66
1.27
17056634
17056636 n Interrupting rating 100kA RMS Symmetrical. 1 kg = 2.2 lbs. 1 lb = 0.45 kg n Watts loss provided at rated current.
n Rated voltage (IEC) †1100V ‡1250V (Consult Bussmann for U.L. Recognition/ CSA Component Acceptance status.) n Microswitch indicator ordered separately.
7-11-01 SB01191
Form No.
Page 1 of 2
BIF Doc #720030

®
1250V/1300V (IEC/U.L.) 50-1400A
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 voltages, the clearing I 2 t is found by multiplying by correction factor, K , given as a function of applied working voltage,
E g
, (RMS).
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%.
1.5
1.25
1.0
K
0.5
0.4
0.3
0.2
E g
400 600 800 1000 1200 1400
- - - - - -
Dashed lines apply to the following amperages:
Size
Amp
1*
400
1
500-630
2
630-1000
3
800-1400
3
2.5
1.8
1.4
UL
6
5
10
3
8
4
3
E g
400 600 800 1000 1200 1400
R
®
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
0.8
K p
0.6
0.5
0.4
0.3
0.2
0.1
I b
30 40 50 60 70 80 90 100%
DIN 43 653: Type -KN/110
Size A B D E H
1*
1
2
3
80 138 59 45 20
80 138 69 53 25
80 138 77 61 25
81 139 92 76 30
Dimension in mm.
1mm = 0.0394∑ 1∑ = 25.4mm
108
A
H
11
D
E B
6
E
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 #720030