Westcode Semiconductors M1858NC120, M1858NC160 Data Sheet
Date:- 11 Mar, 2004
WESTCODE
An IXYS Company
Soft Recovery Diode
Type M1858NC120 to M1858NC160
Old Type No.: SM02-12CXC514
Absolute Maximum Ratings
VOLTAGE RATINGS
V
RRM
V
RSM
I
F(AV)M
I
F(AV)M
I
F(AV)M
I
F(RMS)
I
f(d.c.)
I
FSM
I
FSM2
I2tI
I2t
T
j op
T
stg
Repetitive peak reverse voltage, (note 1) 1200-1600 V
Non-repetitive peak reverse voltage, (note 1) 1300-1700 V
OTHER RATINGS
Maximum average forward current, T
Maximum average forward current. T
Maximum average forward. T
Nominal RMS forward current, T
D.C. forward current, T
Peak non-repetitive surge tp=10ms, VRM=60%V
Peak non-repetitive surge tp=10ms, VRM≤10V, (note 5)
2
t capacity for fusing tp=10ms, VRM=60%V
2
I
t capacity for fusing tp=10ms, VRM≤10V, (note 5)
Operating temperature range -40 to +125 °C
Storage temperature range -40 to +150 °C
sink
=100°C, (note 3) 448 A
sink
=25°C, (note 4) 3011 A
=55°C, (note 2) 1858 A
sink
=100°C, (note 2) 820 A
sink
=25°C, (note 2) 3787 A
sink
, (note 5) 25.0 kA
RRM
, (note 5) 3.25×10
RRM
Data Sheet Issue:- 1
MAXIMUM
LIMITS
MAXIMUM
LIMITS
28.0 kA
6
3.92×10
6
UNITS
UNITS
A2s
A2s
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
Data Sheet. Types M1858NC120 to M1858NC160 Issue 1 Page 1 of 11 March, 2004
initial.
j
below 25°C.
j
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WESTCODE An IXYS Company Fast Recovery Diode Types M1858NC120 to M1858NC160
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Characteristics
PARAMETER MIN. TYP. MAX. TEST CONDITIONS (Note 1) UNITS
V
V
r
V
I
Q
Q
I
t
R
FM
T0
T
FRM
RRM
rr
ra
rm
rr
thJK
Maximum peak forward voltage
--1.7I
--1.6I
Threshold voltage - - 1.127 V
Slope resistance - - 0.127
Maximum forward recovery voltage
- - 10 di/dt = 1000A/µs, Tj=25°C
- - 14 di/dt = 1000A/µs
Peak reverse current
- - 20 Rated V
- - 100 Rated V
Recovered charge - 120 - µC
Recovered charge, 50% Chord - 50 70 µC
Reverse recovery current - 40 - A
Reverse recovery time, 50% Chord - 2.5 -
Thermal resistance, junction to heatsink
- - 0.022 Double side cooled
- - 0.044 Single side cooled
=4500A
FM
=3720A
FM
, Tj=25°C
RRM
RRM
I
=1000A, tp=1000µs, di/dt=60A/µs,
FM
V
=50V, 50% Chord.
r
V
mΩ
V
mA
µs
K/W
F Mounting force 19 - 26 kN
W
Weight - 510 - g
t
Notes:-
1) Unless otherwise indicated T
=125°C.
j
2) For other clamp forces, please consult factory.
Data Sheet. Types M1858NC120 to M1858NC160 Issue 1 Page 2 of 11 March, 2004
WESTCODE
WESTCODE An IXYS Company Fast Recovery Diode Types M1858NC120 to M1858NC160
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Notes on Ratings and Characteristics
1.0 Voltage Grade Table Voltage Grade V
12 1200 1300 810
14 1400 1500 930
16 1600 1700 1050
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 M1858NC120 to M1858NC160 Issue 1 Page 3 of 11 March, 2004
=
FactorK =
dtiQ
.
rrrr
∫
0
t
1
t
2
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f
WESTCODE An IXYS Company Fast Recovery Diode Types M1858NC120 to M1858NC160
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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
= d.c. thermal resistance (°C/W)
thJK
The total dissipation is now given by:
originaltot
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:
)()(
[]
fEWW
⋅+=
RfkETT ⋅+⋅−=
thJKMAXJSINK
2
R
Where: Vr= Commutating source voltage
6.0 Snubber Components When selecting snubber components, care m ust be taken not to us e excessively large values of snubber
capacitor or excessively sm all values of snubber re sistor. Such exc essive com ponent values may lead to
device damage due to the large resultant values of snubber dis charge current. If required, please cons ult
the factory for assistance.
Data Sheet. Types M1858NC120 to M1858NC160 Issue 1 Page 4 of 11 March, 2004
V
⋅= 4
C
R = Snubber resistance
r
di
C
⋅
dt
S
= Snubber capacitance
S
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