SCHOTTKY RECTIFIER
3 Amp
15MQ040N
Bulletin PD-20517 rev. H 0
7/04
1
www.irf.com
Major Ratings and Characteristics
I
F
DC
3
A
V
RRM
40
V
I
FSM
@ tp = 5 s sine
330
A
V
F
@
2Apk, T
J
=125C
0.43
V
T
J
range
- 40 to 150
C
Characteristics
15MQ040N Units
Description/ Features
The 15MQ040N Schottky rectifier is designed to be used for
low-power applications where a reverse voltage of 40 volts is
ancountered and surface mountable is required.
Applications
Switching power supplies
Meter protection
Reverse protection for power input to PC board circuits
Battery isolation and charging
Low threshold voltage diode
Free-wheeling or by-pass diode
Low voltage clamp
Features
Surface mountable
Extremely low forward voltage
Improved reverse blocking voltage capability relative
to other similar size Schottky
Compact size
Case Styles
15MQ040N
SMA
I
F(AV)
= 3 Amp
V
R
= 40V
15MQ040N
Bulletin PD-20517 rev. H 0
7/04
2
www.irf.com
Part number
15MQ040N
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
40
Voltage Ratings
V
FM
Max. Forward Voltage Drop (1)
0.42
V
@ 1A
* See Fig. 1
0.49
V
@ 2A
0.34
V
@ 1A
0.43
V
@ 2A
I
RM
Max. Reverse Leakage Current (1)
0.5
mA
T
J
= 25 C
* See Fig. 2
20
mA
T
J
= 125 C
V
F(TO)
Threshold Voltage
0.26
V
T
J
= T
J
max.
r
t
Forward Slope Resistance
64.6
m
C
T
Typical Junction Capacitance
134
pF
V
R
= 10V
DC
, T
J
= 25C, test signal = 1Mhz
L
S
Typical Series Inductance
2.0
nH
Measured lead to lead 5mm from package 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
Electrical Specifications
Parameters
15MQ Units
Conditions
(1) Pulse Width < 300s, Duty Cycle < 2%
T
J
Max. Junction Temperature Range (*) -40 to 150
C
T
stg
Max. Storage Temperature Range
-40 to 150
C
R
thJA
Max. Thermal Resistance Junction
80
C/W DC operation
to Ambient
wt
Approximate Weight
0.07(0.002) g (oz.)
Case Style
SMA
Similar D-64
Device Marking
IR3F
Thermal-Mechanical Specifications
Parameters
15MQ Units
Conditions
Absolute Maximum Ratings
I
F(AV)
Max. Average Forward Current
2.1
A
50% duty cycle @ T
L
= 105 C, rectangular wave form.
* See Fig. 4
On PC board 9mm
2
island(.013mm thick copper pad area)
I
FSM
Max. Peak One Cycle Non-Repetitive
330
5s Sine or 3s Rect. pulse
Surge Current * See Fig. 6
140
10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy
6.0
mJ
T
J
= 25 C, I
AS
= 1A, L = 12mH
I
AR
Repetitive Avalanche Current
1.0
A
Parameters
15MQ Units
Conditions
A
Following any rated
load condition and
with rated V
RRM
applied
<
thermal runaway condition for a diode on its own heatsink
(*) dPtot
1
dTj
Rth( j-a)
15MQ040N
Bulletin PD-20517 rev. H 0
7/04
www.irf.com
3
Fig. 2 - Typical Peak Reverse Current
Vs. Reverse Voltage
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
Fig. 1 - Maximum Forward Voltage Drop Characteristics
0.1
1
10
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
I
n
s
t
ant
a
n
e
o
u
s
F
o
r
w
a
r
d
C
u
r
r
en
t
-
I
(
A
)
T = 150C
T = 125C
T = 25C
J
J
J
F
FM
Forward Voltage Drop - V (V)
0.001
0.01
0.1
1
10
100
0
5
10
15
20
25
30
35
40
R
R
125C
100C
75C
50C
25C
R
e
v
e
r
s
e
C
u
rr
e
n
t
- I
(
m
A
)
T = 150C
J
Reverse Voltage - V (V)
10
100
1000
0
5
10 15 20 25 30 35 40 45
R
T
J
u
nc
t
i
o
n
Ca
p
a
c
i
t
a
nc
e
-
C (
p
F
)
T = 25C
J
Reverse Voltage - V (V)
15MQ040N
Bulletin PD-20517 rev. H 0
7/04
4
www.irf.com
Fig. 4 - Maximum Average Forward Current
Vs. Allowable Lead Temperature
Fig. 5 - Maximum Average Forward Dissipation
Vs. Average Forward Current
Fig. 6 - Maximum Peak Surge Forward Current Vs. Pulse Duration
(2) Formula used: T
C
= T
J
- (Pd + Pd
REV
) x R
thJC
;
Pd = Forward Power Loss = I
F(AV)
x V
FM
@ (I
F(AV)
/
D) (see Fig. 6);
Pd
REV
= Inverse Power Loss = V
R1
x I
R
(1 - D); I
R
@ V
R1
= 80% rated V
R
100
1000
10
100
1000
10000
FS
M
p
At Any Rated Load Condition
And With Rated V Applied
Following Surge
RRM
Square Wave Pulse Duration - t (microsec)
No
n
-
R
e
p
e
t
i
t
i
v
e
S
u
r
g
e
C
u
r
r
e
n
t
-
I
(
A
)
30
40
50
60
70
80
90
100
110
120
130
140
150
0
0.5
1
1.5
2
2.5
3
DC
F(AV)
see note (2)
A
l
l
o
w
a
bl
e
C
a
s
e
T
e
m
p
e
r
atu
r
e
-
(
C
)
Square wave (D = 0.50)
80% Rated V applied
R
Average Forward Current - I (A)
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
0
0.5
1
1.5
2
2.5
3
DC
A
v
e
r
a
g
e P
o
w
e
r
L
o
s
s
-
(
W
at
t
s
)
F(AV)
RMS Limit
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
Average Forward Current - I (A)
15MQ040N
Bulletin PD-20517 rev. H 0
7/04
www.irf.com
5
IR LOGO
YYWWX
"Y" = 1st digit of the YEAR "standard product"
"P" = "Lead-Free"
2nd digit of the YEAR
SITE ID
WEEK
CURRENT
VOLTAGE
IR3F
2.50 (.098)
2.90 (.114)
4.00 (.157)
4.60 (.181)
1.40 (.055)
1.60 (.062)
.152 (.006)
.305 (.012)
2.00 (.078)
2.44 (.096)
0.76 (.030)
1.52 (.060)
.103 (.004)
.203 (.008)
4.80 (.188)
5.28 (.208)
2.10 MAX.
(.085 MAX. )
5.53 (.218)
1.27 MIN.
(.050 MIN.)
1.47 MIN.
(.058 MIN.)
SOLDERING PAD
C A T H O D E
AN ODE
1
2
1
2
P O LA RI TY
PA RT NU MB ER
Device Marking: IR3F
Dimensions in millimeters and (inches)
Outline SMA
For recommended footprint and soldering techniques refer to application note #AN-994
Outline Table
Marking & Identification
Each device has 2 rows for identification. The first row designates the device as manufactured by International
Rectifier, indicated by the letters "IR", and the Part Number (indicates the current, the voltage rating and
Schottky Generation). The second row indicates the year, the week of manufacturing and the Site ID.
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