*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 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).
Arc Voltage
This curve gives the peak arc voltage,
U
L
, which may appear across the fuse dur-
ing 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.
*Rated voltage 900V
1,5
1,0
K
*
0,5
0,4
0,3
0,2
3
U
L
2,5
2
1,8
1,6
1,4
1,2
10
3
8
7
6
5
4
1,0
0,8
0,7
0,6
0,5
0,4
0,3
0,2
0,15
K
p
Eg
500
600
700
800
900
1000
3
500
600
700
800
900
Eg
1000
0,1
30
I
b
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
Size
3BKN/90+GKN/90
§
A
72.5
73.2
73.2
73.3
A
80.3
B
74
74
74.4
75.4
B
91.4
Max D
61
69
77
92
Max D
92
E
43
52
59
74
E
74
F
M8
M8
M10
M12
F
M12
F
§
5/16” – 18 UNC-2B
5/16” – 18 UNC-2B
3/8” – 16 UNC-2B
1/2” – 13 UNC-2B
F
§
1/2” – 13 UNC-2B
Min G
5
8
10
10
Min G
10
H
ø17.5
ø20
ø24
ø30
H
ø30
Valid for fuses type –GKN/-
Dimensions in mm
1 mm = 0.0394”
1” = 25.4 mm
2-25-02
SB01407
Form No.170M
Page 2 of 4
BIF Doc #720077
Semiconductor Fuse
50-400A, 1000 Volts
BIF Document
720077
Size
1*
Virtual Pre-arcing Time In Seconds
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
125A
50A
200A
80A
400A
315A
10
-1
160A
63A
250A
350A
100A
10
-2
10
-3
10
-4
5x10
1
10
2
10
3
10
4
5x10
4
Prospective Current In Ampere RMS
Pre-Arcing
Time-Current Characteristic Curves
Approved:
Rev. Date:
PK
FEB-99
Page
Pub. Date:
3 of 4
NOV-94
TYPOWER ZILOX
BUSSMANN
P Box 14460
.O.
St. Louis, MO 63178-4460
U.S.A.
Phone: 636-394-2877
Fax:
800-544-2570
Int’l Fax: 636-527-1413
BUSSMANN U.K.
Burton-on-the-Wolds
Leicestershire LE12 5TH
England
Phone: 44-1509-882737
Fax:
44-1509-882786
BUSSMANN DENMARK
5 Literbuen
DK-2740 Skovlunde
Copenhagen, Denmark
Phone: 45-4485-0900
Fax:
45-4485-0901
2-25-02
SB01407
Bussmann reserves the right without notice to change design and/or discontinue distribution of this product.
Semiconductor Fuse
50-400A, 1000 Volts
BIF Document
720077
Size
1*
10
5
Peak Let-Through Current In Amperes
400A
A
350A 315
250A 200A
160A 125A
100A 80A
630A 50A
10
4
10
3
2x10
2
10
2
10
3
10
4
10
5
Amp
10
6
Prospective Short-Circuit Current symmetrical RMS
Peak Let-Through
Cut-Off Current Characteristic Curves
Approved:
Rev. Date:
PK
OCT-94
Page
Pub. Date:
4 of 4
NOV-94
TYPOWER ZILOX
2-25-02
SB01407
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.
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