Page 1
280
Tj
Forward current =
ANSALDO
Ansaldo Trasporti s.p.a.
Unita' Semiconduttori
FAST RECOVERY DIODE ARF240
Repetitive voltage up to 2500 V
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 -
Mean forward current
A
Surge current 3 kA
FINAL SPECIFICATION
feb 97 - ISSUE : 04
Symbol Characteristic Conditions
[°C]
BLOCKING
V RRM Repetitive peak reverse voltage 150 2500 V
V RSM Non-repetitive peak reverse voltage 150 2600 V
I RRM Repetitive peak reverse current V=VRRM 150 50 mA
CONDUCTING
I F (AV) Mean forward current 180° sin ,50 Hz, Th=55°C, double side cooled 280 A
I F (AV) Mean forward current 180° square,50 Hz,Th=55°C,double side cooled 285 A
I FSM Surge forward current Sine wave, 10 ms 150 3 kA
I² t I² t
reapplied reverse voltage up to 50% VRSM
Value Unit
45 x1E3 A²s
V FM Forward voltage
V F(TO) Threshold voltage 150 1.50 V
r F Forward slope resistance 150 3.00 mohm
1000 A 25 4.8 V
SWITCHING
t rr Reverse recovery time I F = 200 A 2.0 µs
Q rr Reverse recovery charge
I rr Peak reverse recovery current
s Softness (s-factor), min 0.4
V FR Peak forward recovery di/dt = 400 A/µs 150 30 V
di/dt = 80 A/µs
VR = 100 V
150 90 µC
90 A
MOUNTING
R th(j-h) Thermal impedance Junction to heatsink, double side cooled 95 °C/kW
T j Operating junction temperature -30 / 150 °C
F Mounting force 4.5 / 5.0 kN
Mass 55 g
ORDERING INFORMATION : ARF240 S 25
standard specification
VRRM/100
Page 2
ARF240 FAST RECOVERY DIODE
Power Dissipation [W]
ANSALDO
Power Dissipation [W]
FINAL SPECIFICATION feb 97 - ISSUE : 04
DISSIPATION CHARACTERISTICS
1200
SQUARE WAVE
1000
800
600
30°
60°
120°
90°
DC
180°
400
200
0
0 50 100 150 200 250 300 350 400
Mean Forward Current [A]
SINE WAVE
1000
900
800
700
30°
60°
120°
90°
180°
DC
600
DC
500
400
300
200
100
0
0 50 100 150 200 250 300 350 400
Mean Forward Current [A]
Page 3
ARF240 FAST RECOVERY DIODE
ANSALDO
Qrr [µC]
Irr [A]
VFR [V]
I
FINAL SPECIFICATION feb 97 - ISSUE : 04
SWITCHING CHARACTERISTICS
FORWARD RECOVERY VOLTAGE
60
50
Tj = 150 °C
40
30
20
F
VFR
10
0
0 200 400 600 800 1000 1200
di/dt [A/µs]
REVERSE RECOVERY CHARGE
Tj = 150 °C
180
250 A
160
140
120
100
80
60
40
20
VF
REVERSE RECOVERY CURRENT
Tj = 150 °C
300
250 A
250
200
150
100
50
ta = Irr / (di/dt) tb = trr - ta
Softness (s factor) s = tb / ta
Energy dissipation during recovery Er = Vr · (Qrr - Irr ·ta / 2 )
0
0 100 200 300 400
di/dt [A/µs]
0
0 100 200 300 400
di/dt [A/µs]
IF
d i/d t
ta
tb
Irr
Vr
Page 4
ARF240 FAST RECOVERY DIODE
FORWARD CHARACTERISTIC
Forward Current [A]
Zth j-h [°C/kW]
SURGE CHARACTERISTIC
ITSM [kA]
ANSALDO
FINAL SPECIFICATION feb 97 - ISSUE : 04
Tj = 150 °C
900
800
700
600
500
400
300
200
100
0
0.6 1.6 2.6 3.6 4.6
Forward Voltage [V]
TRANSIENT THERMAL IMPEDANCE
DOUBLE SIDE COOLED
Tj = 150 °C
3
2.5
2
1.5
1
0.5
0
1 10 100
n° cycles
100.0
90.0
80.0
70.0
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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