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SCHOTTKY RECTIFIER
5.5 Amp
50WQ03FN
Bulletin PD-20551 rev. E 03/03
1
www.irf.com
Major Ratings and Characteristics
I
F(AV)
Rectangular
5.5
A
waveform
V
RRM
30
V
I
FSM
@ tp = 5 s sine
320
A
V
F
@
5 Apk, T
J
= 125C
0.35
V
T
J
range
- 40 to 150
C
Characteristics
50WQ03FN Units
Description/ Features
The 50WQ03FN surface mount Schottky rectifier has been
designed for applications requiring low forward drop and
small foot prints on PC board. Typical applications are in disk
drives, switching power supplies, converters, free-wheeling
diodes, battery charging, and reverse battery protection.
Popular D-PAK outline
Small foot print, surface moutable
Low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
D-Pak (TO-252AA)
6.73 (0.26)
6.35 (0.25)
5.46 (0.21)
5.21 (0.20)
4
1.27 (0.05)
0.88 (0.03)
5.97 (0.23)
1 - Anode
2 - Cathode
3 - Anode
4 - Cathode
1.64 (0.02)
1.52 (0.06)
1.15 (0.04)
1.14 (0.04)
0.76 (0.03)
2x
2.28 (0.09)
2x
0.89 (0.03)
0.64 (0.02)
3x
4.57 (0.18)
1
2
3
6.22 (0.24)
2.38 (0.09)
2.19 (0.08)
6.45 (0.24)
5.68 (0.22)
10.42 (0.41)
9.40 (0.37)
0.46 (0.02)
0.58 (0.02)
1.14 (0.04)
0.89 (0.03)
0.51 (0.02)
MIN.
0.58 (0.02)
0.46 (0.02)
MINIMUM RECOMMENDED FOOTPRINT
5.97 (0.24)
10.67 (0.42)
1.65 (0.06)
6.48 (0.26)
2x
2.54 (0.10)
2x
2.28 (0.09)
2x
Conform to JEDEC outline D-Pak (Similar to TO-252AA)
Dimensions in millimeters and (inches)
Anode
1
3
Base
Cathode
Anode
4, 2
50WQ03FN
Bulletin PD-20551 rev. E 03/03
2
www.irf.com
Part number
50WQ03FN
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
30
Voltage Ratings
V
FM
Max. Forward Voltage Drop
0.46
V
@ 5A
* See Fig. 1
(1)
0.53
V
@ 10A
0.35
V
@ 5A
0.46
V
@ 10A
I
RM
Max. Reverse Leakage Current
3
mA
T
J
= 25 C
* See Fig. 2
(1)
58
mA
T
J
= 125 C
V
F(TO)
Threshold Voltage
0.19
V
T
J
= T
J
max.
r
t
Forward Slope Resistance
22.22
m
C
T
Typical Junction Capacitance
590
pF
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25 C
L
S
Typical Series Inductance
5.0
nH
Measured lead to lead 5mm from package body
T
J
= 25 C
T
J
= 125 C
V
R
= rated V
R
Electrical Specifications
Parameters
50WQ...
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
thJC
Max. Thermal Resistance Junction
3.0
C/W DC operation * See Fig. 4
to Case
wt
Approximate Weight
0.3 (0.01)
g (oz.)
Case Style
D - PAK
Similar to TO-252AA
Thermal-Mechanical Specifications
Parameters
50W...
Units
Conditions
I
F(AV)
Max. Average Forward Current
5.5
A
50% duty cycle @ T
C
= 136C, rectangular wave form
* See Fig. 5
I
FSM
Max. Peak One Cycle Non-Repetitive
320
5s Sine or 3s Rect. pulse
Surge Current * See Fig. 7
130
10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy
10
mJ
T
J
= 25 C, I
AS
= 2.0 Amps, L = 5 mH
I
AR
Repetitive Avalanche Current
2.0
A
Current decaying linearly to zero in 1 sec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Absolute Maximum Ratings
Following any rated
load condition and with
rated V
RRM
applied
A
Parameters
50WQ... Units
Conditions
<
thermal runaway condition for a diode on its own heatsink
(*) dPtot
1
dTj
Rth( j-a)
50WQ03FN
Bulletin PD-20551 rev. E 03/03
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
thJC
Characteristics
Fig. 1 - Maximum Forward Voltage Drop Characteristics
0.001
0.01
0.1
1
10
100
1000
0
5
10
15
20
25
30
R
R
125C
100C
75C
50C
25C
R
e
v
e
r
s
e
C
u
r
r
e
n
t
-
I
(
m
A
)
T = 150C
J
Reverse Voltage - V (V)
0.01
0.1
1
10
0.00001
0.0001
0.001
0.01
0.1
1
th
J
C
t , Rectangular Pulse Duration (Seconds)
Single Pulse
(Thermal Resistance)
1
T
h
e
r
m
a
l
I
m
p
e
d
a
n
c
e
Z
(
C
/
W
)
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
Notes:
1. Duty factor D = t / t
2. Peak T = P x Z + T
J
DM
thJC
C
2
1
2
t
1
t
P
DM
1
10
100
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
I
n
s
t
a
n
t
a
n
e
ou
s
F
o
r
w
a
r
d
C
u
r
r
ent
-
I
(
A
)
F
FM
Forward Voltage Drop - V (V)
T = 150C
T = 125C
T = 25C
J
J
J
100
1000
0
5
10
15
20
25
30
35
R
T
J
u
nc
t
i
o
n
C
a
pac
i
t
an
c
e
-
C
(
p
F
)
Reverse Voltage - V (V)
T = 25C
J
50WQ03FN
Bulletin PD-20551 rev. E 03/03
4
www.irf.com
Fig. 5 - Maximum Allowable Case Temperature
Vs. Average Forward Current
Fig. 6 - Forward Power Loss Characteristics
Fig. 7 - Maximum Non-Repetitive Surge Current
(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
120
125
130
135
140
145
150
0
1
2
3
4
5
6
7
8
DC
A
l
l
o
w
a
b
l
e C
a
s
e
T
e
mp
e
r
at
u
r
e
-
(
C
)
F(AV)
see note (2)
Average Forward Current - I (A)
Square wave (D = 0.50)
80% Rated V applied
R
0
0.5
1
1.5
2
2.5
3
3.5
0
1
2
3
4
5
6
7
8
DC
Ave
r
a
g
e
P
o
w
e
r
L
o
s
s
-
(
W
a
t
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)
100
1000
10
100
1000
10000
FS
M
N
o
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
)
p
At Any Rated Load Condition
And With Rated V Applied
Following Surge
RRM
Square Wave Pulse Duration - t (microsec)
50WQ03FN
Bulletin PD-20551 rev. E 03/03
5
www.irf.com
Tape & Reel Information
TR
FEED DIRECTION
4.1 (0.16)
3.9 (0.15)
2.1 (0.83)
1.9 (0.07)
12.1 (0.48)
1.65 (0.06)
1.85 (0.07)
1.65 (0.06)
7.4 (0.29)
2.6 (0.10)
1.5 (0.06)
7.6 (0.30)
11.9 (0.47)
1.85 (0.07)
TO-252AA Tape & Reel
When ordering, indicate the part
number, part orientation, and the
quantity. Quantities are in multiples
of 2,000 pieces per reel for TR and
multiples of 3,000 pieces per reel
for both TRL and TRR.
13 (0.52) DIA.
DIA. MAX.
375 (14.17)
50 (1.97) DIA.
22.4 (0.88)
0.35 (0.01)
16.3 (0.64)
15.7 (0.62)
2.75 (0.11)
2.55 (0.10)
0.25 (0.01)
6.8 (0.26)
7.0 (0.28)
TRR
FEED DIRECTION
4.1 (0.16)
3.9 (0.15)
2.1 (0.83)
1.9 (0.07)
8.1 (0.32)
1.85 (0.07)
1.65 (0.06)
1.85 (0.07)
1.65 (0.06)
7.4 (0.29)
2.6 (0.10)
1.5 (0.06)
7.6 (0.30)
7.9 (0.31)
0.35 (0.01)
16.3 (0.64)
15.7 (0.62)
2.75 (0.11)
2.55 (0.10)
0.25 (0.01)
10.4 (0.41)
10.6 (0.42)
DIA.
TRL
FEED DIRECTION
4.1 (0.16)
3.9 (0.15)
2.1 (0.83)
1.9 (0.07)
8.1 (0.32)
1.85 (0.07)
1.65 (0.06)
1.85 (0.07)
1.65 (0.06)
7.4 (0.29)
2.6 (0.10)
1.5 (0.06)
7.6 (0.30)
7.9 (0.31)
0.35 (0.01)
16.3 (0.64)
15.7 (0.62)
2.75 (0.11)
2.55 (0.10)
0.25 (0.01)
10.4 (0.41)
10.6 (0.42)
DIA.
DIA.
DIA.
DIA.
DIA.
Marking Information
EXAMPLE: THIS IS A 50WQ03FN
5K3A
50WQ03FN
712A
INTERNATIONAL
RECTIFIER LOGO
PART NUMBER
ASSEMBLY
LOT CODE
4 (K)
1 (A)
3 (A)
2 (K)
DATE CODE (YWWA)
Y
= YEAR
WW = WEEK
A
= LINE
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