WESTCODE
An
Date:- 16 Jun, 2006
Data Sheet Issue:- 1
IXYS
Company
Provisional Data
Rectifier Diode
Type W0428##250 to W0428##320
Development Type No.: WX171##250-320
Absolute Maximum Ratings
VOLTAGE RATINGS
V
RRM
V
RSM
Repetitive peak reverse voltage, (note 1)
Non-repetitive peak reverse voltage, (note 1)
MAXIMUM
LIMITS
2500-3200
2600-3300
UNITS
V
V
OTHER RATINGS
I
F(AV)M
I
F(AV)M
I
F(AV)M
I
F(RMS)
I
F(RMS)
I
F(d.c.)
I
FSM
I
FSM2
It
It
T
j op
T
stg
2
2
MAXIMUM
LIMITS
428
380
271
425
809
675
5500
6050
151×10
183×10
3
3
UNITS
A
A
A
A
A
A
A
A
As
As
°C
°C
2
2
Maximum average forward current, T
case
=55°C, (note 2)
Maximum average forward current. T
case
=70°C, (note 2)
Maximum average forward current. T
case
=100°C, (note 2)
Nominal RMS forward current, T
case
=100°C, (note 2)
Nominal RMS forward current, T
case
=25°C, (note 2)
D.C. forward current, T
case
=25°C
Peak non-repetitive surge t
p
=10ms, V
rm
=60%V
RRM
, (note 3)
Peak non-repetitive surge t
p
=10ms, V
rm
≤10V,
(note 3)
I t capacity for fusing t
p
=10ms, V
rm
=60%V
RRM
, (note 3)
I t capacity for fusing t
p
=10ms, V
rm
≤10V,
(note 3)
Operating temperature range
Storage temperature range
2
2
-40 to +150
-40 to +150
Notes:-
1)
De-rating factor of 0.13% per °C is applicable for T
j
below 25°C.
2)
Single phase; 50Hz, 180° half-sinewave.
3)
Half-sinewave, 150°C T
j
initial.
Provisional Data Sheet. Type W0428##250 to W0428##320 AD Issue 1
Page 1 of 8
June, 2006
WESTCODE
An IXYS Company
Characteristics
Rectifier Diode Type W0428##250 to W0428##320
PARAMETER
V
FM
V
FM
V
T0
r
T
I
RRM
Q
rr
Q
ra
I
rr
t
rr
R
thJC
R
thCK
F
W
t
Maximum peak forward voltage
Maximum peak forward voltage
Threshold voltage
Slope resistance
Peak reverse current
Recovered charge
Recovered charge, 50% chord
Reverse recovery current
Reverse recovery time, 50% chord
Thermal resistance, junction to case
Thermal resistance, case to heatsink
Mounting torque
Weight
MIN.
-
-
-
-
-
-
-
-
-
-
-
24
-
-
TYP.
-
-
-
-
-
1000
700
75
19
-
-
-
175
250
MAX. TEST CONDITIONS
(Note 1)
1.60
1.80
0.926
0.739
15
-
900
-
-
0.13
0.04
30
-
-
Outline E
Outline F
180° sine
I
TM
=100A, t
P
=500µs, di/dt=10A/µs, V
r
=50V
Rated V
RRM
I
TM
=900A
I
TM
=1180A
UNITS
V
V
V
mΩ
mA
µC
µC
A
µs
K/W
K/W
Nm
g
Notes:-
1)
Unless otherwise indicated T
j
=150
°
C.
Provisional Data Sheet. Type W0428##250 to W0428##320 AD Issue 1
Page 2 of 8
June, 2006
WESTCODE
An IXYS Company
Notes on Ratings and Characteristics
1.0 Voltage Grade Table
Voltage Grade
25
26
28
30
32
2.0 Extension of Voltage Grades
V
RRM
V
2500
2600
2800
3000
3200
Rectifier Diode Type W0428##250 to W0428##320
V
RSM
V
2600
2700
2900
3100
3300
V
R
DC V
1500
1550
1650
1750
1850
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 T
j
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
I
AV
−
V
T
0
+
V
T
0
+
4
⋅
ff
⋅
r
T
⋅
W
AV
=
2
⋅
ff
2
⋅
r
T
2
2
W
AV
and:
∆
T
=
R
th
∆
T
=
T
j
max
−
T
K
Where V
T0
=0.926V, r
T
=0.739mΩ,
R
th
= Supplementary thermal impedance, see table below and
ff
= Form factor, see table below.
Supplementary Thermal Impedance
Conduction Angle
Square wave
Sine wave
6 phase (60°)
0.174
0.172
Form Factors
Conduction Angle
Square wave
Sine wave
6 phase (60°)
2.449
2.778
3 phase (120°)
1.732
1.879
½ wave (180°)
1.414
1.57
d.c.
1
3 phase (120°)
0.153
0.153
½ wave (180°)
0.143
0.149
d.c.
0.130
Provisional Data Sheet. Type W0428##250 to W0428##320 AD Issue 1
Page 3 of 8
June, 2006
WESTCODE
An IXYS Company
5.2 Calculating V
F
using ABCD Coefficients
Rectifier Diode Type W0428##250 to W0428##320
The on-state characteristic I
F
vs. V
F
, on page 6 is represented in two ways;
(i)
the well established V
T0
and r
T
tangent used for rating purposes and
(ii)
a set of constants A, B, C, D, forming the coefficients of the representative equation for V
F
in
terms of I
F
given below:
V
F
=
A
+
B
⋅
ln
(
I
F
)
+
C
⋅
I
F
+
D
⋅
I
F
The constants, derived by curve fitting software, are given below for both hot and cold characteristics. The
resulting values for V
F
agree with the true device characteristic over a current range, which is limited to
that plotted.
25°C Coefficients
A
B
C
D
0.7795642
0.04590695
4.64903×10
2.19035×10
-4
-3
150°C Coefficients
A
B
C
D
0.6340984
0.04112559
5.72979×10
-4
-3
5.790022×10
6.0 Reverse recovery ratings
(i) Q
ra
is based on 50% I
rm
chord as shown in Fig. 1
Fig. 1
(ii) Q
rr
is based on a 150µs integration time i.e.
150
µ
s
Q
rr
=
(iii)
∫
i
0
rr
.
dt
t
1
K Factor
=
t
2
Provisional Data Sheet. Type W0428##250 to W0428##320 AD Issue 1
Page 4 of 8
June, 2006
WESTCODE
An IXYS Company
Curves
Figure 1 - Forward characteristics of Limit device
10000
W0428##250-320
AD Issue 1
Rectifier Diode Type W0428##250 to W0428##320
Instantaneous forward current - I
FM
(A)
25°C
150°C
1000
100
10
0.0
0.5
1.0
1.5
2.0
2.5
Maximum instantaneous forward voltage - V
FM
(V)
Figure 2 - Maximum surge and I t ratings
2
100000
Total peak half sine surge current - I
FSM
(A)
W0428##250-320
AD Issue 1
T
j
(initial) = 150°C
1.00E+07
I
2
t: V
RRM
≤10V
10000
I
2
t: V
R
=60% V
RRM
1.00E+06
I
FSM
: V
RRM
≤10V
I
FSM
: V
R
=60% V
RRM
1000
1
3
5
10
1
5
10
50 100
1.00E+05
Duration of surge (ms)
Duration of surge (cycles @ 50Hz)
Provisional Data Sheet. Type W0428##250 to W0428##320 AD Issue 1
Page 5 of 8
June, 2006
Maximum I t (A s)
2
2
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