Bulletin PD-2.439 rev. G 07/04
30BQ040
SCHOTTKY RECTIFIER
3 Amp
I
F(AV)
= 3.0Amp
V
R
= 40V
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
I
FSM
@ t
p
= 5 µs sine
V
F
T
J
@ 3.0 Apk, T
J
= 125°C
range
Description/ Features
The 30BQ040 surface-mount Schottky rectifier has been de-
signed for applications requiring low forward drop and small
foot prints on PC boards. Typical applications are in disk drives,
switching power supplies, converters, free-wheeling diodes,
battery charging, and reverse battery protection.
Small foot print, surface mountable
Very low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
30BQ040 Units
3.0
40
2000
0.43
- 55 to 150
A
V
A
V
°C
Case Styles
30BQ040
SMC
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30BQ040
Bulletin PD-2.439 rev. G 07/04
Voltage Ratings
Part number
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
30BQ040
40
Absolute Maximum Ratings
Parameters
I
F(AV)
Max. Average Forward Current
30BQ
3.0
4.0
Units Conditions
A
50% duty cycle @ T
L
= 118 °C, rectangular wave form
50% duty cycle @ T
L
= 110 °C, rectangular wave form
A
5µs Sine or 3µs Rect. pulse
10ms Sine or 6ms Rect. pulse
mJ
A
T
J
= 25 °C, I
AS
= 1.0A, L = 12mH
Current decaying linearly to zero in 1 µsec
Frequency limited by T
J
max. Va = 1.5 x Vr typical
Following any rated
load condition and
with rated V
RRM
applied
I
FSM
E
AS
I
AR
Max. Peak One Cycle Non-Repetitive
Surge Current
Non Repetitive Avalanche Energy
Repetitive Avalanche Current
2000
110
6.0
1.0
Electrical Specifications
Parameters
V
FM
Max. Forward Voltage Drop
(1)
30BQ
0.53
0.68
0.43
0.57
Units Conditions
V
V
V
V
mA
mA
pF
nH
V/µs
@ 3A
@ 6A
@ 3A
@ 6A
T
J
=
25 °C
V
R
= rated V
R
T
J
= 125 °C
T
J
= 25 °C
I
RM
C
T
L
S
Max. Reverse Leakage Current (1)
0.5
30
T
J
= 125 °C
V
R
= 5V
DC
(test signal range 100KHz to 1Mhz) 25°C
Measured lead to lead 5mm from package body
(Rated V
R
)
Max. Junction Capacitance
Typical Series Inductance
230
3.0
10000
dv/dt Max. Voltage Rate of Change
(1) Pulse Width < 300µs, Duty Cycle < 2%
Thermal-Mechanical Specifications
Parameters
T
J
T
stg
Max. Storage Temperature Range
(**)
46
°C/W DC operation
30BQ
- 55 to 150
12
Units
°C
°C
°C/W DC operation
Conditions
Max. Junction Temperature Range (*) - 55 to 150
R
thJL
Max. Thermal Resistance
Junction to Lead
R
thJA
Max. Thermal Resistance
Junction to Ambient
wt
Approximate Weight
Case Style
Device Marking
(*) dPtot
dTj
<
1
Rth( j-a)
0.24 (0.008) g (oz.)
SMC
IR3F
Similar to DO-214AB
thermal runaway condition for a diode on its own heatsink
(**) Mounted 1 inch square PCB
2
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30BQ040
Bulletin PD-2.439 rev. G 07/04
10
100000
T J = 150˚C
125˚C
100˚C
Reverse Current - I
R
(µA)
10000
1000
75˚C
100
50˚C
(A)
10
25˚C
Instantaneous Forward Current - I
F
T = 150˚C
J
J
J
1
0
10
20
30
Reverse Voltage - V
R
(V)
40
1
T = 125˚C
T = 25˚C
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage (Per Leg)
1000
Junction Capacitance - C
T
(p F)
T J = 25˚C
100
0.1
0
0.1
0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
Forward Voltage Drop - V
FM
(V)
10
0
5
10 15 20 25 30 35 40 45
Reverse Voltage - V
R
(V)
Fig. 1 - Max. Forward Voltage Drop
Characteristics (Per Leg)
100
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage (Per Leg)
(°C/W)
10
Thermal Impedance Z
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
thJC
P
DM
t1
1
Single Pulse
(Thermal Resistance)
Notes:
t2
1. Duty factor D = t1/ t 2
2. Peak Tj = Pdm x ZthJC+Tc
0.1
0.00001
0.0001
0.001
0.01
0.1
1
t
1
, Rectangular Pulse Duration (Seconds)
thJC
10
100
Fig. 4 - Max. Thermal Impedance Z
Characteristics (Per Leg)
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30BQ040
Bulletin PD-2.439 rev. G 07/04
160
Allowable Lead Temperature (°C)
2
Average Power Loss (Watts)
DC
D=0.20
D=0.25
D=0.33
D=0.50
D=0.75
150
140
130
120
110
100
1.5
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
RMS Limit
DC
1
90
Square wave (D = 0.50)
80% Rated Vr applied
0.5
80
70
0
see note (2)
0
1
2
3
4
5
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
Average Forward Current - I
F(AV)
(A)
Fig. 5 - Maximum Average Forward Dissipation
Vs. Average Forward Current
Average Forward Current - I
F(AV)
(A)
Fig. 4 - Maximum Average Forward Current
Vs. Allowable Lead Temperature
Non-Repetitive Surge Current - I
FSM
(A)
10000
1000
100
At Any Rated Load Condition
And With Rated Vrrm Applied
Following Surge
10
10
100
1000
10000
Square Wave Pulse Duration - T
p
(Microsec)
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
4
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30BQ040
Bulletin PD-2.439 rev. G 07/04
Outline Table
Device Marking: IR3F
2.75 (.108)
3.15 (.124)
5.59 (.220)
6.22 (.245)
CATHODE
ANODE
6.60 (.260)
7.11 (.280)
.152 (.006)
.305 (.012)
2.00 (.079)
2.62 (.103)
0.76 (.030)
1.52 (.060)
7.75 (.305)
8.13 (.320)
.102 (.004)
.203 (.008)
1
2
1 POLARITY
2 PART NUMBER
Outline SMC
Dimensions in millimeters and (inches)
For recommended footprint and soldering techniques refer to application note #AN-994
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.
IR3F
VOLTAGE
CURRENT
IR LOGO
YYWWX
SITE ID
WEEK
2nd digit of the YEAR
"Y" = 1st digit of the YEAR "standard product"
"P" = "Lead-Free"
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