DFS454
DFS454
Fast Recovery Diode
Replaces March 1998 version, DS4145-3.4 |
DS4145-4.0 January 2000 |
APPLICATIONS
■Induction Heating
■A.C. Motor Drives
■Inverters And Choppers
■Welding
■High Frequency Rectification
■UPS
FEATURES
■Double Side Cooling
■High Surge Capability
■Low Recovery Charge
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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DFS454 25 |
2500 |
VRSM = VRRM + 100V |
DFS454 24 |
2400 |
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DFS454 22 |
2200 |
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DFS454 20 |
2000 |
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KEY PARAMETERS
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VRRM |
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2500V |
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IF(AV) |
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365A |
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IFSM |
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3500A |
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Qr |
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200μC |
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trr |
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2.0μs |
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Outline type code: M771.
See Package Detials for further information.
CURRENT RATINGS
Symbol |
Parameter |
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Conditions |
Max. |
Units |
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Double Side Cooled |
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I |
Mean forward current |
Half wave resistive load, T |
case |
= 65oC |
365 |
A |
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F(AV) |
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I |
RMS value |
T |
case |
= 65oC |
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575 |
A |
F(RMS) |
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I |
Continuous (direct) forward current |
T |
case |
= 65oC |
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525 |
A |
F |
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Single Side Cooled (Anode side) |
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IF(AV) |
Mean forward current |
Half wave resistive load, Tcase = 65oC |
242 |
A |
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I |
RMS value |
T |
case |
= 65oC |
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380 |
A |
F(RMS) |
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I |
Continuous (direct) forward current |
T |
case |
= 65oC |
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335 |
A |
F |
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1/8
DFS454
SURGE RATINGS
Symbol |
Parameter |
Conditions |
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Max. |
Units |
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IFSM |
Surge (non-repetitive) forward current |
10ms half sine; with 0% VRRM, Tj = 150oC |
3.5 |
kA |
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I2t |
I2t for fusing |
61 x 103 |
A2s |
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IFSM |
Surge (non-repetitive) forward current |
10ms half sine; with 50% VRRM, Tj = 150oC |
2.8 |
kA |
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I2t |
I2t for fusing |
39.2 x 103 |
A2s |
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IFSM |
Surge (non-repetitive) forward current |
10ms half sine; with 100% V |
T |
= 150oC |
- |
kA |
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I2t |
I2t for fusing |
RRM, |
j |
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A2s |
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THERMAL AND MECHANICAL DATA
Symbol |
Parameter |
Conditions |
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Min. |
Max. |
Units |
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Double side cooled |
dc |
- |
0.07 |
oC/W |
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R |
Thermal resistance - junction to case |
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Anode dc |
- |
0.133 |
oC/W |
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th(j-c) |
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Single side cooled |
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Cathode dc |
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0.147 |
oC/W |
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Clamping force 3.5kN |
Double side |
- |
0.02 |
oC/W |
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Rth(c-h) |
Thermal resistance - case to heatsink |
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with mounting compound |
Single side |
- |
0.04 |
oC/W |
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Tvj |
Virtual junction temperature |
On-state (conducting) |
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150 |
oC |
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Tstg |
Storage temperature range |
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-55 |
175 |
oC |
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Clamping force |
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3.0 |
4.0 |
kN |
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CHARACTERISTICS
Symbol |
Parameter |
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Conditions |
Typ. |
Max. |
Units |
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VFM |
Forward voltage |
At 1000A peak, Tcase = 25oC |
- |
3.1 |
V |
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I |
RRM |
Peak reverse current |
At V |
RRM |
, T = 150oC |
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50 |
mA |
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case |
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trr |
Reverse recovery time |
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2.0 |
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μs |
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QRA1 |
Recovered charge (50% chord) |
IF = 750A, diRR/dt = 100A/μs |
- |
200 |
μC |
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IRM |
Reverse recovery current |
Tcase = 125oC, VR = 100V |
150 |
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A |
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K |
Soft factor |
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1.3 |
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- |
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VTO |
Threshold voltage |
At Tvj = 150oC |
- |
1.64 |
V |
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rT |
Slope resistance |
At Tvj = 150oC |
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1.54 |
mΩ |
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V |
FRM |
Forward recovery voltage |
di/dt = 1000A/μs, T = 125oC |
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120 |
V |
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j |
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2/8
DFS454
DEFINITION OF K FACTOR AND QRA1
QRA1 = 0.5x IRR(t1 + t2)
dIR/dt |
k = t |
1 |
/t |
t1 |
t2 |
2 |
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τ |
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0.5x IRR |
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IRR |
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CURVES
F
Instantaneous forward current I - (A)
2000 
Measured under pulse
conditions
1750
1500
1250
Tj = 150˚C
1000
Tj = 25˚C
750
500 |
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1.0 |
2.0 |
3.0 |
4.0 |
5.0 |
Instantaneous forward voltage VF - (V)
Fig. 1 Maximum (limit) forward characteristics
3/8
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