Dimensions in millimeters and inches
Conforms to JEDEC Outline DO - 204AR
CASE STYLE AND DIMENSIONS
Major Ratings and Characteristics
I
F(AV)
Rectangular
9
A
waveform
V
RRM
range
35 to 45
V
I
FSM
@ tp = 5 s sine
2150
A
V
F
@
9 Apk, T
J
= 125C
0.42
V
T
J
range
- 55 to 150
C
Characteristics
90SQ...
Units
Description/Features
The 90SQ axial leaded Schottky rectifier series has been
optimized for very low forward voltage drop, with moderate
leakage. The proprietary barrier technology allows for reliable
operation up to 150C junction temperature. Typical applica-
tions are in switching power supplies, converters, free-
wheeling diodes, and reverse battery protection.
150 C T
J
operation
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Very low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
SCHOTTKY RECTIFIER
9 Amp
90SQ... SERIES
Bulletin PD-2.222 rev. C 12/01
1
www.irf.com
90SQ... Series
Bulletin PD-2.222 rev. C 12/01
2
www.irf.com
V
FM
Max. Forward Voltage Drop (1)
0.48
V
@ 9A
* See Fig. 1
0.57
V
@ 18A
0.42
V
@ 9A
0.52
V
@ 18A
I
RM
Max. Reverse Leakage Current (1)
1.75
mA
T
J
= 25 C
* See Fig. 2
70
mA
T
J
= 125 C
C
T
Max. Junction Capacitance
900
pF
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25 C
L
S
Typical Series Inductance
10.0
nH
Measured lead to lead 5mm from body
dv/dt Max. Voltage Rate of Change
10000
V/ s
(Rated V
R
)
T
J
= 25 C
T
J
= 125 C
V
R
= rated V
R
Parameters
90SQ Units
Conditions
Electrical Specifications
T
J
Max. Junction Temperature Range
-55 to 150
C
T
stg
Max. Storage Temperature Range
-55 to 150
C
R
thJL
Max. Thermal Resistance Junction
8.0
C/W DC operation * See Fig. 4
to Lead
1/8 inch lead leangth
R
thJA
Typical Thermal Resistance,
44
C/W
Junction to Air
wt
Approximate Weight
1.4(0.049) g (oz.)
Case Style
DO - 204AR
JEDEC
Thermal-Mechanical Specifications
Parameters
90SQ Units
Conditions
(1) Pulse Width < 300s, Duty Cycle < 2%
I
F(AV)
Max. Average Forward Current
9
A
50% duty cycle @ T
C
= 69 C, rectangular wave form
* See Fig. 5
I
FSM
Max. Peak One Cycle Non-Repetitive
2150
5s Sine or 3s Rect. pulse
Surge Current * See Fig. 7
340
10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy
12
mJ
T
J
= 25 C, I
AS
= 1.8 Amps, L = 7.4 mH
I
AR
Repetitive Avalanche Current
1.8
A
Current decaying linearly to zero in 1 sec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Parameters
90SQ Units
Conditions
Absolute Maximum Ratings
A
Following any rated
load condition and
with rated V
RRM
applied
Part number
90SQ035
90SQ040
90SQ045
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
35
40
45
Voltage Ratings
90SQ... Series
Bulletin PD-2.222 rev. C 12/01
3
www.irf.com
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
Fig. 4 - Maximum Thermal Impedance Z
thJL
Characteristics
.001
.01
.1
1
10
100
1000
0
5 10 15 20 25 30 35 40 45
R
R
125C
100C
75C
50C
25C
Reverse Voltage - V (V)
Re
v
e
r
s
e
C
u
rre
n
t
-
I
(m
A)
T = 150C
J
100
1000
0
10
20
30
40
50
T = 25C
J
Reverse Voltage - V (V)
R
T
J
unc
t
i
o
n
C
apa
c
i
t
anc
e
-
C
(
p
F
)
Fig. 1 - Maximum Forward Voltage Drop Characteristics
.1
1
10
100
0 .1 .2 .3 .4 .5 .6 .7 .8 .9 1 1.1 1.2
FM
F
I
n
s
t
ant
aneous
F
o
r
w
ar
d C
u
r
r
en
t
-
I
(
A
)
Forward Voltage Drop - V (V)
T = 150C
T = 125C
T = 25C
J
J
J
.01
.1
1
10
.00001
.0001
.001
.01
.1
1
10
100
D = 0.33
D = 0.50
D = 0.25
D = 0.17
D = 0.08
1
t , Rectangular Pulse Duration (Seconds)
Single Pulse
(Thermal Resistance)
Th
e
r
m
a
l
Im
p
e
d
a
n
c
e
-
Z
(
C
/W
)
th
J
L
2
t
1
t
P
DM
Notes:
1. Duty factor D = t / t
2. Peak T = P x Z + T
1
J
DM
C
2
thJL
= 1/8 inch
90SQ... Series
Bulletin PD-2.222 rev. C 12/01
4
www.irf.com
Fig. 8 - Unclamped Inductive Test Circuit
Fig. 5 - Maximum Allowable Case Temperature
Vs. Average Forward Current
Fig. 6 - Forward Power Loss Characteristics
Fig. 7 - Maximum Non-Repetitive Surge Current
0
1
2
3
4
5
6
0
2
4
6
8
10
12
14
DC
A
v
e
r
a
g
e
P
o
w
e
r L
o
s
s
- (W
a
tts
)
F(AV)
D = 0.08
D = 0.17
D = 0.25
D = 0.33
D = 0.50
RMS Limit
Average Forward Current - I (A)
95
105
115
125
135
145
155
0
2
4
6
8
10
12
14
DC
Al
l
o
w
ab
l
e
C
as
e
T
e
m
p
e
ra
t
u
re
-
(
C
)
Average Forward Current - I (A)
F(AV)
90SQ
R (DC) = 8.0C/W
thJL
= 1/8 inch
FR EE-W H E EL
D IO D E
40H FL40 S02
C UR RE N T
M O N ITO R
H IG H-SPE ED
SW ITC H
IRFP460
L
D UT
R g = 25 ohm
V d = 25 V olt
+
100
1000
10000
10
100
1000
10000
FS
M
p
Non-Rep
e
ti
ti
ve Surge Cur
r
en
t - I (A)
At Any Rated Load Condition
And With Rated V Applied
Following Surge
RRM
Square Wave Pulse Duration - t (microsec)
90SQ... Series
Bulletin PD-2.222 rev. C 12/01
5
www.irf.com
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7309
Visit us at www.irf.com for sales contact information. 12/01
Data and specifications subject to change without notice.
This product has been designed and qualified for Industrial Level.
Qualification Standards can be found on IR's Web site.
Ordering Information Table
Device Code
1
2
4
3
1
-
Essential Part Number (current x10)
2
-
S = DO-204AR
3
-
Q = Schottky Q Series
4
-
Voltage Rating
90
S
Q
045
035 = 35V
040 = 40V
045 = 45V
PDF 
ZIP