®
Bu s s m a n n
Square Body – Flus h End Contact
690V (IEC) 1000-4000A
®
Electrical Characteristics
Total Clearing I2t
The total clearing I2t at rated voltage and This curve gives the peak arc voltage,
Arc Voltage
Power Losses
Watts loss at rated current is given in
the electrical characteristics. The curve
allows the calculation of the power loss-
es at load currents lower than the rated
current. The correction factor, K , is
given as a function of the RMS load cur-
at power factor of 15% are given in the
electrical characteristics. For other volt-
ages, the clearing I2t is found by multi-
plying by correction factor, K, given as
a function of applied working voltage,
U , which may appear across the fuse
during its operation as a function of the
L
applied working voltage, E , (RMS) at a
g
power factor of 15%.
p
E , (RMS).
g
rent, I , in % of the rated current .
b
1.5
1.0
Kp
1.4
0.8
K
1)
1.2 UL
103
9
1.0
0.6
0.5
8
7
0.4
0.3
0.5
0.4
6
5
0.2
0.3
4
0.2
Eg
500 600 690
Ib
Eg
0.1
3
100 200 300 400 500 600 690
30 40 50 60
80 90 100%
70
200 300
400
1) Rated voltage 600V
Dim e ns ions
Flush End Contact: Type 4B/-, 4BKN/-, 4G/-, 4GKN/-
Size
F
G
4B
4G
M10 10 deep
⁄Ω™∑ -13 UNC-2B 10 deep
33
38
Dimension in mm.
1mm = 0.0394∑
1∑ = 25.4mm
105
Ø4
F
105
G
15
Ø56
53
67
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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.
Form No.
Page 2 of 2
BIF Doc #720020
SB01191
7-11-01