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WESTCODE
An IXYS Company
Date:- 8 Jun, 2004
Data Sheet Issue:- 1
Soft Recovery Diode
Types M0310YH300 to M0310YH350
Old Type No.: SM30-35HXC103
Absolute Maximum Ratings
VRRM
VRSM
VOLTAGE RATINGS
Repetitive peak reverse voltage, (note 1)
Non-repetitive peak reverse voltage, (note 1)
MAXIMUM
LIMITS
3000-3500
3100-3600
UNITS
V
V
IF(AV)M
IF(AV)M
IF(AV)M
IF(RMS)
If(d.c.)
IFSM
IFSM2
I2t
I2t
Tj op
Tstg
OTHER RATINGS
Maximum average forward current, Tsink=55°C, (note 2)
Maximum average forward current. Tsink=100°C, (note 2)
Maximum average forward. Tsink=100°C, (note 3)
Nominal RMS forward current, Tsink=25°C, (note 2)
D.C. forward current, Tsink=25°C, (note 4)
Peak non-repetitive surge tp=10ms, VRM=60%VRRM, (note 5)
Peak non-repetitive surge tp=10ms, VRM10V, (note 5)
I2t capacity for fusing tp=10ms, VRM=60%VRRM, (note 5)
I2t capacity for fusing tp=10ms, VRM10V, (note 5)
Operating temperature range
Storage temperature range
Notes:-
1) De-rating factor of 0.13% per °C is applicable for Tj below 25°C.
2) Double side cooled, single phase; 50Hz, 180° half-sinewave.
3) Single side cooled, single phase; 50Hz, 180° half-sinewave.
4) Double side cooled.
5) Half-sinewave, 150°C Tj initial.
MAXIMUM
LIMITS
310
199
119
582
497
4590
5050
105×103
128×103
-40 to +150
-40 to +150
UNITS
A
A
A
A
A
A
A
A2s
A2s
°C
°C
Data Sheet. Types M0310YH300 to M0310YH350 Issue 1
Page 1 of 11
June, 2004

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Characteristics
Soft Recovery Diode Types M0310YH300 to M0310YH350
PARAMETER
VFM Maximum peak forward voltage
VT0 Threshold voltage
rT Slope resistance
VFRM Maximum forward recovery voltage
IRRM Peak reverse current
Qrr Recovered charge
Qra Recovered charge, 50% Chord
Irm Reverse recovery current
trr Reverse recovery time, 50% Chord
RthJK Thermal resistance, junction to heatsink
F Mounting force
Wt Weight
MIN.
-
-
-
-
-
-
-
-
-
-
-
-
-
5.5
-
TYP. MAX. TEST CONDITIONS (Note 1)
- 2.80 IFM=635A
- 3.29 IFM=930A
- 1.49
- 2.06
- 105 di/dt = 1000A/µs, 25°C
- 225 di/dt = 1000A/µs
- 50 Rated VRRM
275 -
210 250 IFM=1000A, tp=500µs, di/dt=100A/µs,
155 - Vr=50V, 50% Chord.
2.8 -
- 0.1 Double side cooled
- 0.2 Single side cooled
- 8.5
140 -
Notes:-
1) Unless otherwise indicated Tj=150°C.
UNITS
V
V
m
V
mA
µC
µC
A
µs
K/W
kN
g
Data Sheet. Types M0310YH300 to M0310YH350 Issue 1
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June, 2004

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Soft Recovery Diode Types M0310YH300 to M0310YH350
Notes on Ratings and Characteristics
1.0 Voltage Grade Table
Voltage Grade
30
32
34
35
VRRM
(V)
3000
3200
3400
3500
VRSM
(V)
3100
3300
3500
3600
VR dc
(V)
1700
1800
1850
1875
2.0 De-rating Factor
A blocking voltage de-rating factor of 0.13% per °C is applicable to this device for Tj below 25°C.
3.0 ABCD Constants
These constants (applicable only over current range of VF characteristic in Figure 1) are the
coefficients of the expression for the forward characteristic given below:
VF = A + B ln(I F ) + C I F + D I F
where IF = instantaneous forward current.
4.0 Reverse recovery ratings
(i) Qra is based on 50% Irm chord as shown in Fig.(a) below.
(ii) Qrr is based on a 150µs integration time.
150 µs
I.e. Qrr = irr .dt
0
(iii)
K
Factor
=
t1
t2
Data Sheet. Types M0310YH300 to M0310YH350 Issue 1
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June, 2004

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Soft Recovery Diode Types M0310YH300 to M0310YH350
5.0 Reverse Recovery Loss
The following procedure is recommended for use where it is necessary to include reverse recovery
loss.
From waveforms of recovery current obtained from a high frequency shunt (see Note 1) and reverse
voltage present during recovery, an instantaneous reverse recovery loss waveform must be
constructed. Let the area under this waveform be E joules per pulse. A new sink temperature can then
be evaluated from:
[ ]TSINK = TJ (MAX ) E k + f RthJK
Where k = 0.2314 (°C/W)/s
E = Area under reverse loss waveform per pulse in joules (W.s.)
f = Rated frequency in Hz at the original sink temperature.
RthJK = d.c. thermal resistance (°C/W)
The total dissipation is now given by:
W(tot ) = W(original ) + E f
NOTE 1 - Reverse Recovery Loss by Measurement
This device has a low reverse recovered charge and peak reverse recovery current. When measuring
the charge, care must be taken to ensure that:
(a) AC coupled devices such as current transformers are not affected by prior passage of high
amplitude forward current.
(b) A suitable, polarised, clipping circuit must be connected to the input of the measuring
oscilloscope to avoid overloading the internal amplifiers by the relatively high amplitude forward current
signal.
(c) Measurement of reverse recovery waveform should be carried out with an appropriate critically
damped snubber, connected across diode anode to cathode. The formula used for the calculation of
this snubber is shown below:
R2
=
4
Vr
CS di dt
Where: Vr = Commutating source voltage
CS = Snubber capacitance
R = Snubber resistance
6.0 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.
Data Sheet. Types M0310YH300 to M0310YH350 Issue 1
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June, 2004

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Soft Recovery Diode Types M0310YH300 to M0310YH350
7.0 Computer Modelling Parameters
7.1 Device Dissipation Calculations
I AV = − VT 0 +
VT 0 + 4 ff 2 rT WAV
2 ff 2 rT
Where VT0 =1.49V, rT = 2.06m
ff = form factor (normally unity for fast diode applications)
WAV
=
T
Rth
T = Tj(MAX ) TK
7.2 Calculation of VF using ABCD Coefficients
The forward 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, and D forming the coefficients of the representative equation for VF
in terms of IF given below:
VF = A + B ln(IF ) + C IF + D IF
The constants, derived by curve fitting software, are given in this report for hot 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
A -0.32750255
B 0.4905669
C 1.217811×10-3
D -0.02221939
125°C Coefficients
A 0.05657035
B 0.2226933
C 8.020901×10-4
D 0.03162494
8.0 Frequency Ratings
The curves illustrated in figures 8 to 16 are for guidance only and are superseded by the maximum
ratings shown on page 1.
9.0 Square wave ratings
These ratings are given for load component rate of rise of forward current of 100 and 500 A/µs.
10.0 Duty cycle lines
The 100% duty cycle is represented on all the ratings by a straight line. Other duties can be included
as parallel to the first.
Data Sheet. Types M0310YH300 to M0310YH350 Issue 1
Page 5 of 11
June, 2004