Bussmann®
Square Body - Flush End Contact
1000V (IEC)
Size
1*
Rated
Voltage
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
50–400A
Electrical Characteristics
I2t (A2s)
Rated
Clearing
Current
at Rated
RMS-Amps
Pre-arc
Voltage
50
63
80
100
125
160
200
250
315
350
400
135
215
460
860
1450
2850
4950
9550
21500
29000
42000
815
1300
2750
5100
8600
17500
29500
57000
130000
175000
250000
Ordering Information
Watts
Loss
-BKN/Type K
Indicator for
Micro
-GKN/Type K
Indicator for
Micro
20
25
30
35
40
45
48
50
60
65
70
170M3951
170M3952
170M3953
170M3954
170M3955
170M3956
170M3957
170M3958
170M3959
170M3960
170M3961
170M3921
170M3922
170M3923
170M3924
170M3925
170M3926
170M3927
170M3928
170M3929
170M3930
170M3931
Curves
Carton
Qty.
Carton
Weight
(kg)
See Page
or
(Datasheet)
6
2.35
Page 74
720077
1 kg = 2.2 lbs. 1 lb = 0.45 kg
I
I
I
I
Interrupting rating 150kA (Estimated 300kA) RMS Symmetrical.
Watts loss provided at rated current.
Microswitch ordered separately.
*Overall length is 90 mm, for all other fuses the overall length is 75 mm.
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.
2-25-02
SB01407
Form No. 170M
Page 1 of 4
BIF Doc #720077
Bussmann®
Square Body - Flush End Contact
1000V (IEC)
50–400A
Electrical Characteristics
Total clearing I2t
Arc Voltage
Power Losses
The total clearing I2t at rated voltage and
at power factor of 15% are given in the
electrical characteristics. For other voltages, the clearing I2t is found by multiplying by correction factor, K, given as
a function of applied working voltage,
Eg, (RMS).
This curve gives the peak arc voltage,
UL, which may appear across the fuse during its operation as a function of the
applied working voltage Eg, (RMS) at a
power factor of 15%.
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, Kp,
is given as a function of the RMS load
current, Ib, in % of the rated current.
*Rated voltage 900V
1,5
3
UL
2,5
2
1,8
1,6
1,4
1,2
103
K
*
1,0
0,5
0,3
0,4
0,3
0,2
0,15
4
0,2
Eg
600
700
800
900
Eg
3
1000
Kp
0,8
0,7
0,6
0,5
8
7
6
5
0,4
500
1,0
500
600
700
800
900
0,1
30
1000
Ib
40
50
60
70
80
90 100%
Dimensions
Flush End Contact Type –BKN/- and –GKN/Size
1*BKN/75+GKN/75
1BKN/75+GKN/75
2BKN/75+GKN/75
3BKN/75+GKN/75
B
74
74
74.4
75.4
Max D
61
69
77
92
E
43
52
59
74
F
M8
M8
M10
M12
F§
5/16” – 18 UNC-2B
5/16” – 18 UNC-2B
3/8” – 16 UNC-2B
1/2” – 13 UNC-2B
Min G
5
8
10
10
H
ø17.5
ø20
ø24
ø30
Size
A
B
3BKN/90+GKN/90
80.3
91.4
§
Valid for fuses type –GKN/Dimensions in mm
1 mm = 0.0394”
1” = 25.4 mm
Max D
92
E
74
F
M12
F§
1/2” – 13 UNC-2B
Min G
10
H
ø30
2-25-02
SB01407
A
72.5
73.2
73.2
73.3
Form No.170M
Page 2 of 4
BIF Doc #720077
BIF Document
720077
1*
Size
The partial dotted curves
are for fuses designed to
give part range protection
(aR protection). Loading
or operation above the
curve indicated at A on
the curves must in general
be avoided. Please see
technical guidance
170K…
for further information.
Curves that are not dotted
are for fuses designed to
give full range protection.
1s
400A
315A
200A
125A
80A
50A
10-1
350A
250A
160A
100A
63A
Virtual Pre-arcing Time In Seconds
Semiconductor Fuse
50-400A, 1000 Volts
10-2
10-3
10-4
5x101
102
103
104
5x104
Prospective Current In Ampere RMS
Pre-Arcing
Time-Current Characteristic Curves
TYPOWER ZILOX
2-25-02
SB01407
BUSSMANN
P.O. Box 14460
St. Louis, MO 63178-4460
U.S.A.
Phone: 636-394-2877
Fax:
800-544-2570
Int’l Fax: 636-527-1413
Approved:
PK
Rev. Date:
FEB-99
BUSSMANN U.K.
Burton-on-the-Wolds
Leicestershire LE12 5TH
England
Phone: 44-1509-882737
Fax:
44-1509-882786
Page
Pub. Date:
BUSSMANN DENMARK
5 Literbuen
DK-2740 Skovlunde
Copenhagen, Denmark
Phone: 45-4485-0900
Fax:
45-4485-0901
Bussmann reserves the right without notice to change design and/or discontinue distribution of this product.
3 of 4
NOV-94
BIF Document
Semiconductor Fuse
50-400A, 1000 Volts
720077
1*
Size
Peak Let-Through Current In Amperes
105
400A
A
A
350 315
250A 200A
160A 125A
100A 80A
630A 50A
104
103
2x102
102
103
104
105
106
Amp
Prospective Short-Circuit Current symmetrical RMS
Peak Let-Through
Cut-Off Current Characteristic Curves
TYPOWER ZILOX
2-25-02
SB01407
Approved:
PK
Rev. Date:
OCT-94
Page
Pub. Date:
4 of 4
NOV-94
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 BIF 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.