Westcode Semiconductors M0736LC400, M0736LC450 Data Sheet
Fast Recovery Diode
Type M0736LC400 to M0736LC450
Absolute Maximum Ratings
Date:- 1 Sep, 2003
Data Sheet Issue:- 1
(Old Type No.: SM45CXC374)
VOLTAGE RATINGS
V
RRM
V
RSM
Repetitive peak reverse voltage, (note 1) 4000-4500 V
Non-repetitive peak reverse voltage, (note 1) 4100-4600 V
OTHER RATINGS
I
F(AVM)
I
F(AVM)
I
F(AVM)
I
F(RMS)
I
f(d.c.)
I
FSM
I
FSM2
I2tI
I2t
T
j op
T
stg
Notes:-
1) De-rating factor of 0.13% per °C is applicable for T
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, 125°C T
Maximum average forward current, T
Maximum average forward current. T
Maximum average forward. T
=85°C, (note 3) 291 A
sink
Nominal RMS forward current, T
D.C. forward current, T
=25°C, (note 4) 1229 A
sink
Peak non-repetitive surge tp=10ms, VRM=0.6V
=55°C, (note 2) 736 A
sink
=85°C, (note 2) 493 A
sink
=25°C, (note 2) 1474 A
sink
, (note 5) 9.0 kA
RRM
Peak non-repetitive surge tp=10ms, VRM≤10V, (note 5)
2
t capacity for fusing tp=10ms, VRM=0.6V
2
t capacity for fusing tp=10ms, VRM≤10V, (note 5)
I
, (note 5) 405×10
RRM
Operating temperature range -40 to +125 °C
Storage temperature range -40 to +125 °C
below 25°C.
j
initial.
j
MAXIMUM
LIMITS
MAXIMUM
LIMITS
10.0 kA
3
3
500×10
UNITS
UNITS
A2s
A2s
Data Sheet. Types M0736LC400 to M0736LC450 Issue 1 Page 1 of 11 September, 2003
WESTCODE
WESTCODE An IXYS Company Fast Recovery Diode Type M0736LC400 to M0736LC450
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Characteristics
PARAMETER MIN. TYP. MAX. TEST CONDITIONS (Note 1) UNITS
V
V
r
T
Maximum peak forward voltage
FM
Threshold voltage - - 1.606 V
T0
- - 3.06 IFM=2200A
Slope resistance - - 0.7
V
mΩ
- - 200 di/dt = 1000A/µs
- - 2.56 IFM=1400A
V
I
Q
Q
I
t
R
RRM
rm
rr
Maximum forward recovery voltage
FRM
Peak reverse current
Recovered charge - 1250 - µC
rr
Recovered charge, 50% Chord - 450 520 µC
ra
Reverse recovery current - 170 - A
- - 120 di/dt = 1000A/µs, Tj=25°C
- - 100 Rated V
- - 100 Rated V
I
FM
V
RRM
, Tj=25°C
RRM
=1000A, tp=1000µs, di/dt=60A/µs,
=50V, 50% Chord.
r
Reverse recovery time, 50% Chord - 5.2 -
- - 0.033 Double side cooled
Thermal resistance, junction to heatsink
thJK
- - 0.066 Single side cooled
V
mA
µs
K/W
F Mounting force 10 - 20 kN
W
Weight - 340 - g
t
Notes:-
1) Unless otherwise indicated T
=125°C.
j
Data Sheet. Types M0736LC400 to M0736LC450 Issue 1 Page 2 of 11 September, 2003
WESTCODE
WESTCODE An IXYS Company Fast Recovery Diode Type M0736LC400 to M0736LC450
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Notes on Ratings and Characteristics
1.0 Voltage Grade Table
Voltage Grade V
40 4000 4100 2000
42 4200 4300 2040
44 4400 4500 2080
45 4500 4600 2100
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:
where IF = instantaneous forward current.
4.0 Reverse recovery ratings
(i) Qra is based on 50% Irm chord as shown in Fig.(a) below.
RRM
(V)
V
RSM
(V)
IDICIBAV ⋅+⋅+⋅+= )ln(
FFFF
V
dc
R
(V)
(ii) Qrr is based on a 150µs integration time.
s
µ
150
I.e.
(iii)
Data Sheet. Types M0736LC400 to M0736LC450 Issue 1 Page 3 of 11 September, 2003
=
FactorK =
dtiQ
.
rrrr
∫
0
t
1
t
2
WESTCODE
f
)
WESTCODE An IXYS Company Fast Recovery Diode Type M0736LC400 to M0736LC450
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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:
)(
Where k = 0.2314 (°C/W)/s
E
= Area under reverse loss waveform per pulse in joules (W.s.)
= Rated frequency in Hz at the original sink temperature.
R
The total dissipation is now given by:
This device has a low reverse recovered charge and peak reverse recovery current. When measuring the
charge, care must be taken to ensure that:
amplitude forward current.
to avoid overloading the internal amplifiers by the relatively high amplitude forward current signal.
= d.c. thermal resistance (°C/W)
th(J-Hs
originaltot
NOTE 1 - Reverse Recovery Loss by Measurement
(a) AC coupled devices such as current transformers are not affected by prior passage of high
(b) A suitable, polarised, clipping circuit must be connected to the input of the measuring oscilloscope
[]
fEWW
)()(
⋅+=
RfkETT ⋅+⋅−=
thJKMAXjSINK
(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:
2
R
Where: Vr= Commutating source voltage
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.
V
⋅= 4
C
R = Snubber resistance
r
di
C
⋅
dt
S
= Snubber capacitance
S
Data Sheet. Types M0736LC400 to M0736LC450 Issue 1 Page 4 of 11 September, 2003
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