Data Sheet. MD#950-12N1W to 22N1W Issue 2 Page 1 of 9 May, 2005
IXYS Date: 23.05.2005
Data Sheet Issue: 2
Dual Diode Water Cooled Modules MD# 950
Absolute Maximum Ratings
VRRM
VDRM
[V]
MDD MDA MDK
1200 950-12N1W 950-12N1W 950-12N1W
1400 950-14N1W 950-14N1W 950-14N1W
1600 950-16N1W 950-16N1W 950-16N1W
1800 950-18N1W 950-18N1W 950-18N1W
2000 950-20N1W 950-20N1W 950-20N1W
2200 950-22N1W 950-22N1W 950-22N1W
VOLTAGE RATINGS MAXIMUM
LIMITS UNITS
VRRM Repetitive peak reverse voltage 1) 1200-2200 V
VRSM Non-repetitive peak reverse voltage 1) 1300-2300 V
OTHER RATINGS MAXIMUM
LIMITS UNITS
IF(AV)M Maximum average forward current. Twater = 17°C, 4l/min 2), 3) 1129 A
IF(AV)M Maximum average forward current. Twater = 45°C, 4l/min 2), 3) 950 A
IF(AV)M Maximum average forward current. Twater = 85°C, 4l/min 2), 3) 668 A
IF(RMS) Nominal RMS forward current. Twater = 17°C, 4l/min 2), 3) 1773 A
IF(d.c.) D.C. forward current. Twater = 17°C, 4l/min 3) 1427 A
ITSM Peak non-repetitive surge tp = 10 ms, VRM = 60%VRRM 4) 21.8 kA
ITSM2 Peak non-repetitive surge tp = 10 ms, VRM ≤ 10 V 4) 24.0 kA
I2tI
2t capacity for fusing tp = 10 ms, VRM = 60%VRRM 4) 2.38×106A2s
I2tI2t capacity for fusing tp = 10 ms, VRM ≤ 10 V 4) 2.88×106A2s
Visol Isolation Voltage 5) 3500 V
Tvj op Operating temperature range -40 to +150 °C
Tstg Storage temperature range -40 to +125 °C
Notes:
1) De-rating factor of 0.13% per °C is applicable for TVj below 25°C.
2) Single phase; 50 Hz, 180° half-sinewave.
3) Current ratings do not include adjustments, which may be necessary due to heat being returned by cable connections.
4) Half-sinewave, 150°C TVj initial.
5) AC RMS voltage, 50 Hz, 1min test.
IXYS Dual Diode Module Types MD#950-12N1W to MD#950-22N1W
Data Sheet. MD#950-12N1W to 22N1W Issue 2 Page 2 of 9 May, 2005
Characteristics
PARAMETER MIN. TYP. MAX. TEST CONDITIONS 1) UNITS
VFM Maximum peak forward voltage - - 1.35 IFM = 2850 A V
VFM Maximum peak forward voltage - - 0.88 IFM = 500 A V
VT0 Threshold voltage - - 0.75 V
rTSlope resistance - - 0.2 mΩ
IRRM Peak reverse current - - 50 Rated VRRM mA
Qrr Recovered Charge - 1800 - µC
Qra Recovered Charge, 50% chord - 1500 1750 µC
Irm Reverse recovery current - 165 - A
trr Reverse recovery time, 50% chord - 18 -
IFM = 1000 A, tp = 1 ms,
di/dt = 10 A/µs, Vr = 50 V
µs
RthJW Thermal resistance, junction to water - - 0.09 Single Diode K/W
F1Mounting force (to heatsink) 4.25 - 5.75 Nm
F2Mounting force (to terminals) 10.2 - 13.8 2) Nm
WtWeight - 1.2 - kg
Notes:
1) Unless otherwise indicated Tvj = 150°C
2) Screws must be lubricated
IXYS Dual Diode Module Types MD#950-12N1W to MD#950-22N1W
Data Sheet. MD#950-12N1W to 22N1W Issue 2 Page 3 of 9 May, 2005
Notes on Ratings and Characteristics
1.0 Voltage Grade Table
Voltage Grade VRRM
V
VRSM
V
VR
DC V
12 1200 1300 820
14 1400 1500 930
16 1600 1700 1040
18 1800 1900 1150
20 2000 2100 1260
22 2200 2300 1370
2.0 Extension of Voltage Grades
This report is applicable to other voltage grades when supply has been agreed by Sales/Production.
3.0 De-rating Factor
A blocking voltage de-rating factor of 0.13%/°C is applicable to this device for Tj below 25°C.
4.0 Snubber Components
When selecting snubber components, care must be taken not to use excessively large values of snubber
capacitor or excessively small values of snubber resistor. Such excessive component values may lead to
device damage due to the large resultant values of snubber discharge current. If required, please consult
the factory for assistance.
5.0 Computer Modelling Parameters
5.1 Device Dissipation Calculations
T
AVTTT
AV rff
WrffVV
I⋅⋅
⋅⋅⋅++−
=2
2
2
00
2
4
and:
Kj
th
AV
TTT
R
T
W
−=∆
∆
=
max
Where VT0=0.75V, rT=0.2mΩ,
Rth = Supplementary thermal impedance, see table below and
ff = Form factor, see table below.
Supplementary Thermal Impedance
Conduction Angle 30° 60° 90° 120° 180° 270° d.c.
Square wave 0.0976 0.0955 0.0942 0.0933 0.0920 0.0907 0.090
Sine wave 0.0950 0.0933 0.0924 0.0917 0.0902
Form Factors
Conduction Angle 30° 60° 90° 120° 180° 270° d.c.
Square wave 3.464 2.449 2 1.732 1.414 1.149 1
Sine wave 3.98 2.778 2.22 1.879 1.57
IXYS Dual Diode Module Types MD#950-12N1W to MD#950-22N1W
Data Sheet. MD#950-12N1W to 22N1W Issue 2 Page 4 of 9 May, 2005
5.2 Calculating VF using ABCD Coefficients
The on-state characteristic IF vs. VF, on page 6 is represented in two ways;
(i) the well established VT0 and rT tangent used for rating purposes and
(ii) a set of constants A, B, C, D, forming the coefficients of the representative equation for VF in
terms of IF given below:
()
FFFF IDICIBAV ⋅+⋅+⋅+= ln
The constants, derived by curve fitting software, are given below for both hot and cold characteristics.
The resulting values for VF agree with the true device characteristic over a current range, which is
limited to that plotted.
25°C Coefficients 150°C Coefficients
A0.46164273 A0.435837127
B0.1048225 B0.06435749
C1.6116×10-4 C1.84243×10-4
D-7.48063×10-3 D-2.353947×10-3
IXYS Dual Diode Module Types MD#950-12N1W to MD#950-22N1W
Data Sheet. MD#950-12N1W to 22N1W Issue 2 Page 5 of 9 May, 2005
5.3 D.C. Thermal Impedance Calculation
∑
=
=
−
−⋅=
np
p
t
pt
p
err
1
1
τ
Where p = 1 to n, n is the number of terms in the series and:
t = Duration of heating pulse in seconds.
rt= Thermal resistance at time t.
r
p
= Amplitude of pth term.
τ
p
= Time Constant of rth term.
The coefficients for this device are shown in the tables below:
D.C.
Term 12345
rp0.07972 3.64310×10-3 4.87795×10-3 1.91134×10-3 2.16406×10-3
τ
p4.46119 0.71394 0.06312 5.07740×10-3 6.07258×10-3
6.0 Reverse recovery ratings
(i) Qra is based on 50% IRM chord as shown in Fig. 1
Fig. 1
(ii) Qrr is based on a 150 µs integration time i.e.
∫
=
s
rrrr dtiQ
µ
150
0
.
(iii)
2
1
t
t
FactorK =
IXYS Dual Diode Module Types MD#950-12N1W to MD#950-22N1W
Data Sheet. MD#950-12N1W to 22N1W Issue 2 Page 6 of 9 May, 2005
Curves
Figure 1 - Forward characteristics of Limit device Figure 2 - Transient thermal impedance
100
1000
10000
00.511.52
Instantaneous Forward voltage - VFM (V)
Instantaneous Forward current - I
FM
(A)
Tj = 150°C Tj = 25°C
0.00001
0.0001
0.001
0.01
0.1
0.00001 0.0001 0.001 0.01 0.1 1 10 100
Time (s)
Thermal impedance (K/W)
Single Diode
Figure 3 – Average forward current and Power loss Vs. Inlet water temperature
100
1000
10000
0 102030405060708090
Inlet water temperature, Twater (°C)
Forward current, I
F(AV)M
(A)
100
1000
10000
Total Power Loss (W)
Power Loss
Average Current
MD#950-12N1W to 22N1W
Issue 2
MD#950-12N1W to 22N1W
Issue 2 MD#950-12N1W to 22N1W
Issue 2
IXYS Dual Diode Module Types MD#950-12N1W to MD#950-22N1W
Data Sheet. MD#950-12N1W to 22N1W Issue 2 Page 7 of 9 May, 2005
Figure 4 - Total recovered charge, Qrr Figure 5 - Recovered charge, Qra (50% chord)
1000
10000
1 10 100 1000
di/dt (A/µs)
Recovered charge - Q
rr
(µC)
Tj=150°C
1500A
2000A
1000A
500A
1000
10000
1 10 100 1000
di/dt (A/µs)
Recovered charge - Q
ra
, 50% chord (µC)
500A
Tj=150°C
1000A
2000A
1500A
Figure 6 - Peak reverse recovery current, Irm Figure 7 - Maximum recovery time, trr (50% chord)
100
1000
10000
1 10 100 1000
di/dt (A/µs)
Reverse recovery current - I
rm
(A)
2000A
1500A
1000A
500A
Tj=150°C
1
10
100
1 10 100 1000
di/dt (A/µs)
Reverse recovery time - t
rr
, (50% chord) - (µs)
2000A
1500A
1000A
500A
Tj=150°C
MD#950-12N1W to
22N1W MD#950-12N1W to 22N1W
Issue 2
MD#950-12N1W to
22N1W
MD#950-12N1W to 22N1W
Issue 2
IXYS Dual Diode Module Types MD#950-12N1W to MD#950-22N1W
Data Sheet. MD#950-12N1W to 22N1W Issue 2 Page 8 of 9 May, 2005
Figure 8 – Forward current vs. Power dissipation
Figure 9 – Forward current vs. Water
temperature
0
200
400
600
800
1000
1200
1400
1600
0 500 1000 1500
Mean Forward Current (A) (Whole cycle averaged)
Maximum Forward Dissipation (W)
6ø
3ø
½ wave
d.c.
0
20
40
60
80
100
120
140
160
0 500 1000 1500
Mean forward current (A) (Whole cycle averaged)
Maximum permissible water temperature (°C)
6ø
3ø
½ wave
d.c.
Figure 10 - Maximum surge Rating
1000
10000
100000
Total peak half sine surge current (A)
1.00E+06
1.00E+07
1.00E+08
Maximum I
2
t (A
2
s)
135101 5 10 50 100
Duration of surge (ms) Duration of surge (cycles @ 50Hz)
I2t: 60% VRRM
ITSM: 60% VRRM
I2t: VRRM ≤10V
ITSM: VRRM ≤10V
Tj (initial) = 150°C
MD#950-12N1W to 22N1W
Issue 2 MD#950-12N1W to 22N1W
Issue 2
MD#950-12N1W to 22N1W
Issue 2
IXYS Dual Diode Module Types MD#950-12N1W to MD#950-22N1W
Data Sheet. MD#950-12N1W to 22N1W Issue 2 Page 9 of 9 May, 2005
Outline Drawing & Ordering Information
ORDERING INFORMATION (Please quote 11 digit code as below)
M D# 950
N1W
Fixed
Type Code
Configuration code
DD, DA, DK
Average Current
Rating
Voltage code
VDRM/100
12-22
Standard diode Fixed
Version Code
Water cooled
base
Order code: MDD950-14N1W– MDD configuration, 1400V VDRM, VRRM, water cooled base
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The information contained herein is confidential and is protected by Copyright. The information may not be used or disclosed
except with the written permission of and in the manner permitted by the proprietors IXYS Semiconductors GmbH.
In the interest of product improvement, IXYS reserves the right to change specifications at any time without prior notice.
© IXYS Semiconductor GmbH.
31 2
MDD
31 2
MDK
31 2
MDA
