MF34
MF34
Fast Recovery Diode
Replaces March 1998 version, DS4624-2.1 |
DS4624-3.0 January 2000 |
APPLICATIONS
■Inverse, Parallel Or Series Connected Diode
■Power Supplies
■High Frequency Applications
FEATURES
■Glass Passivation
■High Voltage Capability
■Fast Recovery Characteristics
VOLTAGE RATINGS
Type Number |
Repetitive Peak |
Conditions |
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Reverse Voltage |
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VRRM |
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V |
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MF34 - 1600 |
1600 |
VRSM = VRRM +100V |
MF34 -1400 |
1400 |
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MF34 - 1200 |
1200 |
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MF34 -1000 |
1000 |
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MF34 - 800 |
800 |
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Lower voltage grades available.
For stud anode add suffix 'R' to type number. e.g. MF34-1600R.
KEY PARAMETERS
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VRRM |
1600V |
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IF(AV) |
40A |
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IFSM |
400A |
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Qr |
25μC |
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trr |
0.25ns |
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Outline type code: DO5.
See Package Details for further information.
CURRENT RATINGS
Symbol |
Parameter |
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Conditions |
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Max. |
Units |
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I |
Mean forward current |
Half sine wave resistive load, T |
case |
= 65oC |
40 |
A |
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F(AV) |
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I |
RMS value |
T |
case |
= 65oC |
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63 |
A |
F(RMS) |
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I |
Continuous (direct) forward current |
T |
case |
= 65oC |
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50 |
A |
F |
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1/7
MF34
SURGE RATINGS
Symbol |
Parameter |
Conditions |
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Max. |
Units |
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I |
Surge (non-repetitive) forward current |
10ms half sine; with V |
RRM |
≤ 10V, T |
= 125oC |
400 |
A |
FSM |
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j |
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I2t |
I2t for fusing |
10ms half sine; Tj = 125oC |
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800 |
A2s |
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THERMAL AND MECHANICAL DATA
Symbol |
Parameter |
Conditions |
Min. |
Max. |
Units |
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Rth(j-c) |
Thermal resistance - junction to case |
dc |
- |
0.8 |
oC/W |
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Rth(c-h) |
Thermal resistance - case to heatsink |
Mounting torque 3.5Nm |
- |
0.2 |
o |
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with mounting compound |
C/W |
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Tvj |
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Forward (conducting) |
- |
125 |
oC |
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Virtual junction temperature |
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Reverse (blocking) |
- |
125 |
oC |
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Tstg |
Storage temperature range |
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-55 |
125 |
˚C |
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Mounting torque |
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3.5 |
4.0 |
Nm |
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CHARACTERISTICS
Symbol |
Parameter |
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Conditions |
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Typ. |
Max. |
Units |
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VFM |
Forward voltage |
At 120A peak, Tcase = 25oC |
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- |
2.0 |
V |
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I |
Peak reverse current |
At V |
RRM |
, T = 100oC |
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- |
5 |
mA |
RM |
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case |
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trr |
Reverse recovery time |
IF = 1A, diRR/dt = 25A/μs, Tcase |
= 25˚C, |
- |
250 |
ns |
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VR = 100V |
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QR |
Recovered charge |
IF = 50A, diRR/dt = 50A/μs, Tcase |
= 25˚C, |
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25 |
μC |
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VR = 100V |
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VTO |
Threshold voltage |
At Tvj = 125oC |
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- |
1.2 |
V |
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rT |
Slope resistance |
At Tvj = 125oC |
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- |
7.0 |
mΩ |
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2/7
MF34
CURVES
Instantaneous forward current - (A)
200
Measured under pulse 
conditions 
150 
Tj = 25˚C
Tj = 125˚C
100
50
0
0 |
1.0 |
2.0 |
3.0 |
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Instantaneous forward voltage - (V) |
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Fig.1 Maximum (limit) forward characteristics
(A) |
400 |
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Tcase = 125˚C |
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- |
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- ˚C/W |
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current |
350 |
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VR |
= VRRM |
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sinewavehalfPeak forward |
1 |
2 |
3 4 5 |
10 |
50 |
Thermalimpedance |
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300 |
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250 |
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200 |
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Cycles at 50Hz |
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Duration |
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1.00
0.75
0.50
0.25
0
0.001
d.c.
0.01 |
0.1 |
1.0 |
10 |
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Time - |
(s) |
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Fig.2 Surge (non-repetitive) forward current vs time |
Fig.3 Maximum transient thermal impedance |
3/7
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