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PDF K0885NC440 Datasheet ( Hoja de datos )

Número de pieza K0885NC440
Descripción Medium Voltage Thyristor
Fabricantes IXYS 
Logotipo IXYS Logotipo
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K0885NC440 datasheet

1 Page

K0885NC440 pdf
WESTCODE An IXYS Company
Medium Voltage Thyristor Types K0885N#440 to K0885N#520
11.2 Calculating VT using ABCD Coefficients
The on-state characteristic IT vs. VT, on page 6 is represented in two ways;
(i) the well established V0 and rs tangent used for rating purposes and
(ii) a set of constants A, B, C, D, forming the coefficients of the representative equation for VT in
terms of IT given below:
VT = A + B ln(IT ) + C IT + D IT
The constants, derived by curve fitting software, are given below for both hot and cold characteristics. The
resulting values for VT agree with the true device characteristic over a current range, which is limited to
that plotted.
25°C Coefficients
A 1.817265
B -0.137011
C 4.436071e-4
D 0.0205661
125°C Coefficients
A 0.1339075
B 0.1991792
C 8.79778e-4
D -5.972062e-3
11.3 D.C. Thermal Impedance Calculation
rt
=
p=n
rp
p =1
1
t
eτ p

Where p = 1 to n, n is the number of terms in the series and:
t = Duration of heating pulse in seconds.
r
t
=
Thermal resistance at time t.
rp = Amplitude of pth term.
τp = Time Constant of rth term.
The coefficients for this device are shown in the tables below:
Term
rp
τp
1
0.01249139
0.8840810
D.C. Double Side Cooled
23
6.316833×10-3
1.850855×10-3
0.1215195
0.03400152
4
1.922045×10-3
6.742908×10-3
5
6.135330×10-4
1.326292×10-3
Term
rp
τp
1
0.02919832
6.298105
2
4.863568×10-3
3.286174
D.C. Single Side Cooled
34
3.744798×10-3 6.818034×10-3
0.5359179
0.1186897
5
2.183558×10-3
0.02404574
6
1.848294×10-3
3.379476×10-3
Provisional Rating Report. Types K0885N#440 to K0885N#520 Issue 1
Page 5 of 12
March, 2009

5 Page

K0885NC440 arduino
WESTCODE An IXYS Company
Figure 19 – Maximum surge and I2t Ratings
100000
K0885N#440-520
AD Issue 1
Tj (initial) = 125°C
Medium Voltage Thyristor Types K0885N#440 to K0885N#520
1.00E+07
I2t: VRRM 10V
I2t: 60% VRRM
10000
1.00E+06
ITSM: VRRM 10V
ITSM: 60% VRRM
1000
1
3 5 10
Duration of surge (ms)
1
5 10
50 100
Duration of surge (cycles @ 50Hz)
1.00E+05
Provisional Rating Report. Types K0885N#440 to K0885N#520 Issue 1
Page 11 of 12
March, 2009

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