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70CRU02PbF
Vishay High Power Products
Ultrafast Rectifier,
2 x 35 A FRED PtTM
Base
common
cathode
2
TO-218
13
Anode
2 Anode
1 Common 2
cathode
FEATURES
• Two common-cathode diodes
• Ultrafast reverse recovery
Available
• Ultrafast reverse recovery current shape
RoHS*
• Low forward voltage drop
COMPLIANT
• Low leakage current
• Optimized for power conversion: welding and industrial
SMPS applications
• Up to 175 °C operating junction temperature
• Lead (Pb)-free (“PbF” suffix)
• Designed and qualified for industrial level
PRODUCT SUMMARY
trr
IF(AV) at TC = 145 °C
VR
28 ns
2 x 35 A
200 V
DESCRIPTION
The 70CRU02 integrates two state of the art Vishay HPP
ultrafast recovery rectifiers in the common-cathode
configuration. The planar structure of the diodes, and the
platinum doping life-time control, provide a ultrasoft recovery
current shape, together with the best overall performance,
ruggedness and reliability characteristics. These devices are
thus intended for high frequency applications in which the
switching energy is designed not to be predominant portion
of the total energy, such as in the output rectification stage
of welding machines, SMPS, dc-to-dc converters. Their
extremely optimized stored charge and low recovery current
reduce both over-dissipation in the switching elements (and
snubbers) and EMI/RFI.
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Continuous forward current per diode
IF(AV)
Cathode to anode voltage
Single pulse forward current per diode
VR
IFSM
Maximum power dissipation per module
PD
Operating junction and storage temperatures TJ, TStg
TEST CONDITIONS
TC = 145 °C
TC = 25 °C
TC = 100 °C
MAX.
35
200
300
67
- 55 to 175
UNITS
A
V
A
W
°C
ELECTRICAL SPECIFICATIONS PER DIODE (TJ = 25 °C unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN. TYP.
Breakdown voltage,
blocking voltage
VBR,
VR
IR = 60 µA
IF = 35 A
200 -
- 0.95
Forward voltage
VF IF = 35 A, TJ = 125 °C
- 0.9
IF = 35 A, TJ = 175 °C
- 0.85
Reverse leakage current
VR = VR rated
IR
TJ = 150 °C, VR = VR rated
--
--
Junction capacitance
Series inductance
CT VR = 200 V
- 50
Measured from A-lead to K-lead 5 mm
LS from package body
- 10
MAX. UNITS
-
1.09
1.0
0.9
60
2
-
V
µA
mA
pF
- nH
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 94509
Revision: 21-Jul-08
For technical questions, contact: diodes-tech@vishay.com
www.vishay.com
1

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70CRU02PbF
Vishay High Power Products
Ultrafast Rectifier,
2 x 35 A FRED PtTM
DYNAMIC RECOVERY CHARACTERISTICS PER DIODE (TJ = 25 °C unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN. TYP. MAX. UNITS
Reverse recovery time
Peak recovery current
Reverse recovery charge
trr
IRRM
Qrr
TJ = 25 °C
TJ = 125 °C
TJ = 25 °C
TJ = 125 °C
TJ = 25 °C
TJ = 125 °C
TJ = 25 °C
TJ = 125 °C
IF = 1 A
VR = 30 V
dIF/dt = 200 A/µs
IF = 35 A
VRR = 100 V
dIF/dt = 200 A/µs
- - 28
- 34 -
- 26 -
- 49 -
- 3.7 -
- 8.2 -
- 48.7 -
- 202 -
ns
A
µC
THERMAL - MECHANICAL SPECIFICATIONS
PARAMETER
SYMBOL
TEST CONDITIONS
Thermal resistance,
junction to case
per diode
both legs
RthJC
Thermal resistance,
case to heatsink
RthCS
Mounting surface, flat, smooth and greased
Weight
Mounting torque
Marking device
Case style TO-218
MIN.
-
-
-
-
-
1.2
(10)
TYP.
0.8
-
0.2
MAX.
0.9
0.45
-
UNITS
K/W
5.5 -
0.2 -
2.4
- (20)
70CRU02
g
oz.
N˜m
(lbf ˜ in)
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For technical questions, contact: diodes-tech@vishay.com
Document Number: 94509
Revision: 21-Jul-08

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Ultrafast Rectifier,
2 x 35 A FRED PtTM
70CRU02PbF
Vishay High Power Products
1000
100
T J= 175˚C
10 T = 125˚C
J
T = 25˚C
J
1000
100
10
T J = 175˚C
125˚C
1
25˚C
0.1
0.01
0
50 100 150
Reverse Voltage - VR (V)
200
Fig. 2 - Typical Values of Reverse Current vs.
Reverse Voltage
1000
T J = 25˚C
100
1
0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 3.6 4
Forward Voltage Drop - VFM (V)
Fig. 1 - Maximum Forward Voltage Drop Characteristics
(Per Diode)
1
10
1 10 100 1000
Reverse Voltage - VR (V)
Fig. 3 - Typical Junction Capacitance vs.
Reverse Voltage
0.1
Single Pulse
(Thermal Resistance)
PDM
t1
t2
Notes:
1. Duty factor D = t1/ t2
2. Peak Tj = Pdm x ZthJC + Tc
0.01
0.0001
0.001
0.01
0.1
t1, Rectangular Pulse Duration (Seconds)
1
Fig. 4 - Maximum Thermal Impedance ZthJC Characteristics (Per Diode)
Document Number: 94509
Revision: 21-Jul-08
For technical questions, contact: diodes-tech@vishay.com
www.vishay.com
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70CRU02PbF
Vishay High Power Products
Ultrafast Rectifier,
2 x 35 A FRED PtTM
180
170
160
150 DC
140
130
120 Square wave (D = 0.50)
110 Rated Vr applied
100
90 see note (1)
80
0 10 20 30 40 50 60
Average Forward Current - I F(AV) (A)
Fig. 5 - Maximum Allowable Case Temperature vs.
Average Forward Current
80
If = 35A
70 Vrr = 100V
60
50 Tj = 125˚C
40
30 Tj = 25˚C
20
10
0
100 1000
di F /dt (A/μs )
Fig. 7 - Typical Reverse Recovery Time vs. dIF/dt
50
40
30
RMS Limit
20
10
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
DC
0
0 10 20 30 40 50 60
Average Forward Current - I F(AV) (A)
Fig. 6 - Forward Power Loss Characteristics
Note
(1) Formula used: TC = TJ - (Pd + PdREV) x RthJC;
Pd = Forward power loss = IF(AV) x VFM at (IF(AV)/D) (see fig. 6);
PdREV = Inverse power loss = VR1 x IR (1 - D); IR at VR1 = Rated VR
600
If = 35A
Vrr = 100V
500
400 Tj = 125˚C
300
200
Tj = 25˚C
100
0
100 1000
di F /dt (A/μs )
Fig. 8 - Typical Stored Charge vs. dIF/dt
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For technical questions, contact: diodes-tech@vishay.com
Document Number: 94509
Revision: 21-Jul-08

No Preview Available !

Ultrafast Rectifier,
2 x 35 A FRED PtTM
70CRU02PbF
Vishay High Power Products
VR = 200 V
L = 70 µH
0.01
D.U.T.
dIF/dt
adjust
G
D
IRFP250
S
Fig. 9 - Reverse Recovery Parameter Test Circuit
IF
0
(3)
trr
ta
tb
(2) IRRM
(4)
Qrr
0.5 IRRM
dI(rec)M/dt (5)
0.75 IRRM
(1) dIF/dt
(1) dIF/dt - rate of change of current
through zero crossing
(2) IRRM - peak reverse recovery current
(3) trr - reverse recovery time measured
from zero crossing point of negative
going IF to point where a line passing
through 0.75 IRRM and 0.50 IRRM
extrapolated to zero current.
(4) Qrr - area under curve defined by trr
and IRRM
Qrr =
trr x IRRM
2
(5) dI(rec)M/dt - peak rate of change of
current during tb portion of trr
Fig. 10 - Reverse Recovery Waveform and Definitions
Document Number: 94509
Revision: 21-Jul-08
For technical questions, contact: diodes-tech@vishay.com
www.vishay.com
5