Rectifier Diode Datasheet
W6672T#320-350
W6672T#320 & W6672T#350
Rectifier Diode
Product Summary
Characteristic
Value
Unit
VRRM
3200-3500
V
IF(AV)M (TSINK = 55 °C)
6672
A
IFSM
73.0
kA
Rth,JK DSC
0.008
K/W
Features
• Low conduction losses
• High temperature alloyed die construction
• Low thermal impedance
• Available in 26mm and 35mm package heights
• High power cycling capability
Agency Approvals & Environmental
Environmental Approvals
RoHS
Applications
• Line frequency applications up to 400Hz
• Traction converters
• Trackside substations
• DC Power supplies
• Input rectifiers for Variable speed drives
Component Symbol
Benefits
• High over-load capacity
• High power density
1
Specifications are subject to change without notice.
Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
© 2020 Littelfuse, Inc.
Revised: 8-Dec-20
Rectifier Diode Datasheet
W6672T#320-350
1. Maximum Ratings ........................................................................................................................................................... 3
2. Characteristics ................................................................................................................................................................ 3
3. Notes on Ratings and Characteristics ............................................................................................................................. 4
3.1. Voltage Grade Table ................................................................................................................................................ 4
3.2. Extension of Voltage Grades ................................................................................................................................... 4
3.3. De-rating Factor ....................................................................................................................................................... 4
3.4. Snubber Components .............................................................................................................................................. 4
3.5. Computer Modelling Parameters ............................................................................................................................ 4
3.5.1. Device Dissipation Calculations ........................................................................................................................ 4
3.6. Calculating VF using ABCD Coefficients .................................................................................................................... 5
3.7. DC Thermal Impedance Calculation ........................................................................................................................ 5
3.8. Reverse Recovery Ratings ........................................................................................................................................ 6
4. Performance Curves ....................................................................................................................................................... 7
5. Package Dimensions ..................................................................................................................................................... 10
6. Ordering Information ................................................................................................................................................... 10
7. Packing Options ............................................................................................................................................................ 10
2
Specifications are subject to change without notice.
Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
© 2020 Littelfuse, Inc.
Revised: 8-Dec-20
Rectifier Diode Datasheet
W6672T#320-350
1. Maximum Ratings
Voltage Ratings
Symbol
Value
Unit
(1)
VRRM
3200-3500
V
VRSM
3300-3600
V
Symbol
Value
Unit
IF(AV)M
6672
A
(2)
IF(AV)M
4612
A
Maximum Average Forward Current, TSINK = 100 °C (3)
IF(AV)M
2384
A
Nominal RMS Forward Current, TSINK = 25 °C (2)
IF(RMS)M
12288
A
Repetitive Peak Reverse Voltage
Non-repetitive Peak Reverse Voltage (1)
Ratings
Maximum Average Forward Current, TSINK = 55 °C (2)
Maximum Average Forward Current, TSINK = 100 °C
D.C. Forward Current, TSINK = 25 °C
(4)
IF(DC)
10682
A
Peak Non-repetitive Surge, tp = 10 ms, Vrm = 60% VRRM (5)
IFSM
65.7
kA
Peak Non-repetitive Surge, tp = 10 ms, VRM ≤ 10 V (5)
IFSM2
73.0
kA
I2t
21.58 x
106
A2s
I2t
26.65 x 106
A2s
Operating Temperature range
TJ,OP
-40 to +160
°C
Storage Temperature Range
TSTG
-55 to +160
°C
I2t capacity for Fusing, tp = 10 ms, VRM = 60% VRRM
(5)
I2t capacity for Fusing, tp = 10 ms, VRM ≤ 10 V (5)
Footnote 1: De-rating factor of 0.13% per °C is applicable for TJ below 25 °C
Footnote 2: Double side cooled, single phase; 50 Hz, 180° half-sinewave
Footnote 3: Cathode side cooled, single phase; 50 Hz, 180° half-sinewave
Footnote 4: Double side cooled
Footnote 5: Half-sinewave, 160 °C TJ initial
2. Characteristics
Characteristic
Symbol
Value
Conditions
Min
Typ
Max
IFM = 5000 A
-
-
1.18
IFM = 8000 A
-
-
1.37
Unit
Maximum Peak Forward Voltage
VFM
Threshold Voltage
V0
-
-
-
0.864
V
Slope Resistance
rS
-
-
-
0.067
mΩ
Peak Reverse Current
IRRM
Rated VRRM
-
-
100
mA
Recovered Charge
Qrr
-
9500
-
µC
Recovered Charge, 50% Chord
Qra
-
7200
7900
µC
Reverse Recovery Current
Irm
-
280
-
A
Reverse Recovery Time, 50% Chord
trr
-
52
-
µs
Double Side Cooled
-
-
0.008
Rth,JK
Anode Side Cooled
-
-
0.013
-
-
0.020
F
Cathode Side Cooled
For other clamp forces, please
consult factory
-
60
-
70
kN
-
1.2
-
kg
Thermal Resistance, Junction to Heatsink
Mounting Force
Weight
Wt
ITM = 4000 A, tp = 1000 µs,
di/dt = 10 A/µs, Vr = 100 V
V
K/W
Note: Unless otherwise indicated, TJ = 160 °C
3
Specifications are subject to change without notice.
Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
© 2020 Littelfuse, Inc.
Revised: 8-Dec-20
Rectifier Diode Datasheet
W6672T#320-350
3. Notes on Ratings and Characteristics
3.1. Voltage Grade Table
32
VRRM
(V)
3200
VRSM
(V)
3300
VR
(VDC)
1750
35
3500
3600
1900
Voltage Grade
3.2. Extension of Voltage Grades
This report is applicable to other voltage grades when supply has been agreed by Sales/Production.
3.3. De-rating Factor
A blocking voltage de-rating factor of 0.13%/°C is applicable to this device for TJ below 25 °C.
3.4. 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.
3.5. Computer Modelling Parameters
3.5.1. Device Dissipation Calculations
𝑊𝐴𝑉 =
2
−𝑉0 + √𝑉0 + 4 ∙ 𝑓𝑓 2 ∙ 𝑟𝑠 ∙ 𝑊𝐴𝑉
𝐼𝐴𝑉 =
and
2 ∙ 𝑓𝑓 2 ∙ 𝑟𝑠
∆𝑇
𝑅𝑡ℎ
∆𝑇 = 𝑇𝐽,𝑀𝑎𝑥 − 𝑇𝐾
Where:
• V0 = 0.864 V
• rS = 0.067 mΩ
• Rth = Supplementary thermal impedance, see Table 1 below
• ff = Form factor, see Table 2 below
Supplementary Thermal Impedance
6 Phase (60°)
3 Phase (120°)
½ Phase (180°)
DC
Square Wave Double Side Cooled
Conduction Angle
0.00866
0.00847
0.00832
0.00800
Square Wave Cathode Side Cooled
0.02118
0.02101
0.02086
0.02000
Sine Wave Double Side Cooled
0.00855
0.00837
0.00813
-
0.02068
-
Sine Wave Cathode Side Cooled
0.02108
0.02091
Table 1. Supplementary Thermal Impedance Values
Form Factors
6 Phase (60°)
3 Phase (120°)
½ Phase (180°)
DC
Square Wave
Conduction Angle
2.449
1.732
1.414
1
Sine Wave
2.778
1.57
-
1.879
Table 2. Form Factor Values
4
Specifications are subject to change without notice.
Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
© 2020 Littelfuse, Inc.
Revised: 8-Dec-20
Rectifier Diode Datasheet
W6672T#320-350
3.6. Calculating VF using ABCD Coefficients
The on-state characteristic IF vs. VF, on page 7 are represented in two ways:
• The well-established V0 and rS tangent used for rating purposes
• A set of constants A, B, C, D, forming the coefficients of the representative equation for VF in terms of IF given
below:
𝑉𝐹 = 𝐴 + 𝐵 ∙ ln(𝐼𝐹 ) + 𝐶 ∙ 𝐼𝐹 + 𝐷 ∙ √𝐼𝐹
The constants, derived by curve fitting software, are given below for both hot and cold characteristics. The resulting
values for VF agree with the true device characteristic over a current range, which is limited to that plotted.
25 °C Coefficients
160 °C Coefficients
A
0.7063900
A
0.39067
B
0.01555266
B
0.033410
C
2.926184 x 10-5
C
4.7250 x 10-5
D
10-3
D
3.8157 x 10-3
3.197501 x
3.7. DC Thermal Impedance Calculation
𝑝=𝑛
−𝑡
𝑟𝑡 = ∑ 𝑟𝑝 ∙ (1 − 𝑒 𝜏𝑝 )
𝑝=1
Where p = 1 to n, n is the number of terms in the series and:
• T = Duration of heating pulse in seconds
• rt = Thermal resistance at time t
• rp = Amplitude of pth term
• τp = Time constant of rth term
The coefficients for this device are show in the tables below:
D.C. Double Side Cooled
Term
1
2
3
4
rp
3.81150 x 10-3
1.89558 x 10-3
1.71360 x 10-3
5.24282 x 10-3
τp
1.01434
0.34872
0.08992
Table 3. Coefficient Values for D.C. Double Side Cooled
0.01065
D.C. Cathode Side Cooled
Term
1
2
3
rp
0.01653
3.37618 x 10-3
5.93598 x 10-4
τp
5.31595
0.15120
Table 4. Coefficient Values for D.C. Cathode Side Cooled
5
0.01207
Specifications are subject to change without notice.
Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
© 2020 Littelfuse, Inc.
Revised: 8-Dec-20
Rectifier Diode Datasheet
W6672T#320-350
3.8. Reverse Recovery Ratings
• Qra is based on 50% Irm chord as shown in Diagram 1
Diagram 1. Reverse Recovery Waveform Example
150 µ𝑠
• Qrr is based on a 150 µs integration time. I.e.: 𝑄𝑟𝑟 = ∫0
• 𝐾 𝐹𝑎𝑐𝑡𝑜𝑟 =
𝑖𝑟𝑟 ∙ 𝑑𝑡
𝑡1
𝑡2
6
Specifications are subject to change without notice.
Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
© 2020 Littelfuse, Inc.
Revised: 8-Dec-20
Rectifier Diode Datasheet
W6672T#320-350
4. Performance Curves
Figure 1. Forward Characteristics of Limit Device
Figure 2. Transient Thermal Impedance
10000
0.1
W6672T#320-350
Issue A1
KSC 0.0205 K/W
ASC 0.0133 K/W
0.01
TJ = 160 °C
1000
Thermal Impedance (K/W)
Instaneous On-state Current, IFM (A)
DSC 0.0080 K/W
TJ = 25 °C
0.001
0.0001
W6672T#320-350
Issue A1
100
0
0.5
1
1.5
0.00001
0.0001 0.001
2
0.01
Instantaneous On-state Voltage, VFM (V)
Figure 3. Total Recovered Charge, Qrr
1
10
100
Figure 4. Recovered Charge, Qra (50% Chord)
100000
100000
W6672T#320-350
Issue A1
Recovered Charge - 50% Chord, Qra (µC)
W6672T#320-350
Issue A1
Total Recovered Charge, Qrr (µC)
0.1
Time (s)
4000 A
3000 A
2000 A
1000 A
10000
4000 A
3000 A
2000 A
1000 A
10000
(TJ = 160 °C)
(TJ = 160 °C)
1000
1000
1
10
100
1000
1
di/dt (A/µs)
10
100
1000
di/dt (A/µs)
7
Specifications are subject to change without notice.
Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
© 2020 Littelfuse, Inc.
Revised: 8-Dec-20
Rectifier Diode Datasheet
W6672T#320-350
Figure 5. Peak Reverse Recovery Current, Irm
Figure 6. Maximum Recovery Time, trr (50% Chord)
10000
100
W6672T#320-350
Issue A1
Reverse Recovery Time - 50% Chord, trr (µs)
Reverse Recovery Current, Irm (A)
W6672T#320-350
Issue A1
4000 A
3000 A
2000 A
1000 A
1000
4000 A
3000 A
2000 A
1000 A
(TJ = 160 °C)
(TJ = 160 °C)
100
10
1
10
100
1000
1
10
100
di/dt (A/µs)
di/dt (A/µs)
Figure 7. Forward Current vs. Power Dissipation
(Double Side Cooled)
Figure 8. Forward Current vs. Heat Sink Temperature
(Double Side Cooled)
18000
160
d.c.
6ø
16000
W6672T#320-350
Issue A1
3ø 1/2 wave
Maximum Permissable Heatsink Temperature (°C)
140
14000
Maximum Forward Dissipation (W)
1000
12000
10000
8000
6000
4000
120
100
80
60
40
20
2000
6ø
3ø
1/2 wave
d.c.
W6672T#320-350
Issue A1
0
0
0
2000
4000
6000
8000
10000 12000
0
Mean Forward Current (A)
(Whole Cycle Averaged)
2000
4000
6000
8000
10000
12000
Mean Forward Current (A)
(Whole Cycle Averaged)
8
Specifications are subject to change without notice.
Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
© 2020 Littelfuse, Inc.
Revised: 8-Dec-20
Rectifier Diode Datasheet
W6672T#320-350
Figure 9. Forward Current vs. Power Dissipation
(Cathode Side Cooled)
Figure 10. Forward Current vs. Heatsink Temperature
(Cathode Side Cooled)
8000
160
W6672T#320-350
Issue A1
d.c.
7000
140
3ø 1/2 wave
Maximum Permissable Heatsink Temperature (°C)
Maximum Forward Dissipation (W)
6ø
6000
5000
4000
3000
2000
1000
120
100
80
60
40
20
6ø
3ø
1/2 wave
d.c.
W6672T#320-350
Issue A1
0
0
0
1000
2000
3000
4000
5000
6000
0
1000
Mean Forward Current (A)
(Whole Cycle Averaged)
2000
3000
4000
5000
6000
Mean Forward Current (A)
(Whole Cycle Averaged)
Figure 11. Maximum Surge Current
1000000
1E+09
W6672T#320-350
Issue A1
I2t: VRRM ≤ 10 V
I2t: 60% VRRM
100000
100000000
Maximum I2t (A2s)
Total Peak Half Sine Surge Current (A)
(TJ (initial) = 160 °C)
ITSM: VRRM ≤ 10 V
ITSM: 60% VRRM
10000
10000000
1
3
5
10
______________________
Duration of Surge
1
5
10
50
100
____________________________________________
Duration of Surge (Cycles @ 50 Hz)
9
Specifications are subject to change without notice.
Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
© 2020 Littelfuse, Inc.
Revised: 8-Dec-20
Rectifier Diode Datasheet
W6672T#320-350
5. Package Dimensions
6. Ordering Information
W6672
Fixed
Type Code
Outline Code
TE = 35 ± 1 mm
TJ = 26 ± 1 mm
7. Packing Options
◊◊
Voltage Code
VRRM/100
32-35
0
Fixed Code
Order Code: W6672TJ350 – 3500 VRRM, 26 mm clamp height capsule
Part Number
M.O.Q.
W6672TJ320
1
W6672TJ350
1
W6672TE320
1
W6672TE350
1
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Disclaimer Notice - Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining
or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal
injury, death, or property damage) other than those expressly forth in applicable Littelfuse product documentation. Littelfuse shall not be liable for any claims or damages arising out of products
used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation.
Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics
10
Specifications are subject to change without notice.
Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics.
© 2020 Littelfuse, Inc.
Revised: 8-Dec-20