Page 1
Tj
Forward current =
ANSALDO
Ansaldo Trasporti s.p.a.
Unita' Semiconduttori
FAST RECOVERY DIODE ARF322
Repetitive voltage up to 1600 V
Mean forward current 740 A
Surge current 11 kA
FINAL SPECIFICATION
ott 97 - ISSUE : 04
Via N. Lorenzi 8 - I 16152 GENOVA - ITALY
Tel. int. +39/(0)10 6556549 - (0)10 6556488
Fax Int. +39/(0)10 6442510
Tx 270318 ANSUSE I -
Symbol Characteristic Conditions
[°C]
Value Unit
BLOCKING
V RRM Repetitive peak reverse voltage 125 1600 V
V RSM Non-repetitive peak reverse voltage 125 1700 V
I RRM Repetitive peak reverse current V=VRRM 125 50 mA
CONDUCTING
I F (AV) Mean forward current 180° sin ,50 Hz, Th=55°C, double side cooled 740 A
I F (AV) Mean forward current 180° square,50 Hz,Th=55°C,double side cooled 740 A
I FSM Surge forward current Sine wave, 10 ms 125 11 kA
I² t I² t
V FM Forward voltage
V F(TO) Threshold voltage 125 0.90 V
r F Forward slope resistance 125 0.500 mohm
reapplied reverse voltage up to 50% VRSM
605 x1E3 A²s
1200 A 25 1.65 V
SWITCHING
t rr Reverse recovery time I F = 1000 A 2.0 µs
Q rr Reverse recovery charge
I rr Peak reverse recovery current
s Softness (s-factor), min 0.5
V FR Peak forward recovery di/dt= 100 A/µs 4 V
di/dt= 60 A/µs
VR = 50 V
125 60 µC
70 A
MOUNTING
R th(j-h) Thermal impedance Junction to heatsink, double side cooled 52 °C/kW
T j Operating junction temperature -30 / 125 °C
F Mounting force 8.4 / 9.4 kN
Mass 280 g
ORDERING INFORMATION : ARF322 S 16
standard specification
VRRM/100
Page 2
ARF322 FAST RECOVERY DIODE
Power Dissipation [W]
ANSALDO
Power Dissipation [W]
FINAL SPECIFICATION ott 97 - ISSUE : 04
DISSIPATION CHARACTERISTICS
1400
1200
1000
800
30°
600
400
SQUARE WAVE
90°
60°
120°
DC
DC
180°
200
0
0 200 400 600 800 1000
Mean Forward Current [A]
SINE WAVE
1400
1200
1000
800
600
120°
90°
60°
30°
DC
180°
400
200
0
0 200 400 600 800 1000
Mean Forward Current [A]
Page 3
ARF322 FAST RECOVERY DIODE
ANSALDO
Qrr [µC]
Irr [A]
VFR [V]
I
FINAL SPECIFICATION ott 97 - ISSUE : 04
SWITCHING CHARACTERISTICS
FORWARD RECOVERY VOLTAGE
10.00
9.00
8.00
7.00
6.00
5.00
4.00
3.00
2.00
1.00
0.00
0 50 100 150 200 250 300 350
REVERSE RECOVERY CHARGE
180
160
140
Tj = 125 °C
di/dt [A/µs]
Tj = 125 °C
1000 A
500 A
250
200
F
VFR
VF
REVERSE RECOVERY CURRENT
Tj = 125 °C
1000 A
500 A
250 A
120
100
80
60
40
20
0
0 100 200 300 400
di/dt [A/µs]
250 A
ta = Irr / (di/dt) tb = trr - ta
Softness (s factor) s = tb / ta
Energy dissipation during recovery Er = Vr · (Qrr - Irr ·ta / 2 )
150
100
50
0
0 100 200 300 400
di/dt [A/µs]
IF
d i/d t
ta
tb
Irr
Vr
Page 4
ARF322 FAST RECOVERY DIODE
FORWARD CHARACTERISTIC
Forward Current [A]
Zth j-h [°C/kW]
SURGE CHARACTERISTIC
ITSM [kA]
ANSALDO
FINAL SPECIFICATION ott 97 - ISSUE : 04
Tj = 125 °C
2500
2000
1500
1000
500
0
0.6 1.1 1.6 2.1 2.6
Forward Voltage [V]
TRANSIENT THERMAL IMPEDANCE
DOUBLE SIDE COOLED
Tj = 125 °C
12
10
8
6
4
2
0
1 10 100
n° cycles
60.0
50.0
40.0
30.0
20.0
10.0
0.0
0.001 0.01 0.1 1 10 100
t[s]
All the characteristics given in this data sheet are guaranteed only with uniform
clamping force, cleaned and lubricated heatsink, surfaces with flatness < .03 mm
and roughness < 2 µm.
In the interest of product improvement ANSALDO reserves the right to change
any data given in this data sheet at any time without previous notice.
If not stated otherwise the maximum value of ratings (simbols over shaded
background) and characteristics is reported.
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