IF(AV) Rectangular 40 A
waveform
VRRM 15 V
IFSM @ tp = 5 µs sine 700 A
VF@ 19 Apk, TJ = 125°C 0.25 V
(per leg, Typical)
TJ- 55 to 125 °C
Characteristics Value Units
Major Ratings and Characteristics
SCHOTTKY RECTIFIER 2 x 20 Amps
STPS40L15CW
Bulletin PD-20622 rev. A 08/03
1
www.irf.com
The STPS40L15CW center tap Schottky rectifier module has
been optimized for ultra low forward voltage drop specifically
for the OR-ing of parallel power supplies. The proprietary
barrier technology allows for reliable operation up to 125 °C
junction temperature. Typical applications are in parallel
switching power supplies, converters, reverse battery protec-
tion, and redundant power subsystems.
125°C TJ operation (VR < 5V)
Center tap module
Optimized for OR-ing applications
Ultra low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Description/ Features TO-247AC
Dimensions in millimeters and inches
Conform to JEDEC outline TO-247AC (TO-3P)
15 .90 (0 .626 )
15 .30 (0 .602 )
14 . 20 ( 0 . 559 )
14.80 (0. 583)
3. 70 (0 .14 5)
4.30 ( 0 . 17 0)
5.30 (0.208)
5. 70 (0 .22 5)
5.50 (0.217)
4. 50 (0 .17 7)
( 2 PLCS.)
3.55 ( 0 . 13 9)
3. 65 (0 .14 4)
2.20 ( 0 . 08 7)
MAX.
1. 00 (0 .03 9)
1. 40 (0 .05 6)
0. 40 (0 .21 3)
0.80 (0.032)
4.70 (0.185)
5. 30 (0 .20 9)
1.5 ( 0.059)
2.5 (0.0 98)
2.40 ( 0 . 09 5 )
MAX.
10 .86 (0 .427 )
10. 94 ( 0.430)
20 .30 (0 .800 )
19 .70 (0 .775 )
DIA.
123
2
BASE
COMMON
CATHODE
123
ANODE
COMMON
CATHODE
A
NODE
12
STPS40L15CW
Bulletin PD-20622 rev. A 08/03
2www.irf.com
IF(AV) Max. Average Forward (Per Leg) 20 A 50% duty cycle @ TC = 86°C, rectangular wave form
Current * See Fig. 5 (Per Device) 40
IFSM Max. Peak One Cycle Non-Repetitive 700 5µs Sine or 3µs Rect. pulse
Surge Current (Per Leg) * See Fig. 7 330 10ms Sine or 6ms Rect. pulse
EAS Non-Repetitive Avalanche Energy 10 mJ TJ = 25 °C, IAS = 2 Amps, L = 5 mH
(Per Leg)
IAR Repetitive Avalanche Current 2 A Current decaying linearly to zero in 1 µsec
(Per Leg) Frequency limited by TJ max. VA = 1.5 x VR typical
Part number STPS40L15CW
VRMax. DC Reverse Voltage (V) @ TJ = 100 °C
VRWM Max. Working Peak Reverse Voltage (V) @ TJ = 100 °C 15
TJMax. Junction Temperature Range -55 to 125 °C
Tstg Max. Storage Temperature Range -55 to 150 °C
RthJC Max. Thermal Resistance Junction 1.4 °C/W DC operation * See Fig. 4
to Case (Per Leg)
RthJC Max. Thermal Resistance Junction 0.7 °C/W DC operation
to Case (Per Package)
RthCS Typical Thermal Resistance, Case 0.24 °C/W Mounting surface , smooth and greased
to Heatsink
wt Approximate Weight 6 (0.21) g (oz.)
T Mounting Torque Min. 6 (5) Non-lubricated threads
Max. 12 (10)
Case Style TO-247AC (TO-3P) JEDEC
Thermal-Mechanical Specifications
Kg-cm
(Ibf-in)
Parameters Value Units Conditions
Absolute Maximum Ratings
Following any rated
load condition and with
rated VRRM applied
Parameters Value Units Conditions
A
Typ. Max.
VFM Forward Voltage Drop 0.41 V @ 19A
(Per Leg) * See Fig. 1 (1) 0.52 V @ 40A
0.25 0.33 V @ 19A
0.37 0.50 V @ 40A
IRM Reverse Leakage Current - 10 mA TJ = 25 °C
(Per Leg) * See Fig. 2 (1) - 600 mA TJ = 100 °C
VF(TO) Threshold Voltage 0.182 V TJ = TJ max.
rtForward Slope Resistance 7.6 m Ω
CTMax. Junction Capacitance(Per Leg) - 2000 pF VR = 5VDC, (test signal range 100Khz to 1Mhz) 25°C
LSTypical Series Inductance (Per Leg) 8 - nH Measured lead to lead 5mm from package body
dv/dt Max. Voltage Rate of Change 10000 V/ µs
(Rated VR)
TJ = 25 °C
TJ = 125 °C
VR = rated VR
Parameters Value Units Conditions
(1) Pulse Width < 300µs, Duty Cycle <2%
Voltage Ratings
Electrical Specifications
STPS40L15CW
Bulletin PD-20622 rev. A 08/03
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 ZthJC Characteristics
Fig. 1 - Maximum Forward Voltage Drop Characteristics
1
10
100
1000
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
F
FM
Forward Voltage Drop - V (V)
In stan taneou s Forward Curren t - I (A)
T = 125°C
T = 75 °C
T = 25 °C
J
J
J
0.1
1
10
100
1000
03691215
R
R
75°C
50°C
25°C
Reverse Current - I (mA)
Reverse Voltage - V (V)
T = 100°C
J
100
1000
10000
0 5 10 15 20
R
T
Ju ncti on Capacitance - C (pF)
Reverse Vol tage - V (V)
T = 25°C
J
0.01
0.1
1
10
0.00001 0.0001 0.001 0.01 0.1 1 10 100
thJC
t , Rectangular Pulse Duration (Seconds)
Single Pulse
(The rmal Resist ance)
1
The rm al Impedance Z ( °C /W)
Notes:
1. Duty factor D = t / t
2. Peak T = P x Z + T
12
JthJC C
DM
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
2
t
1
t
P
DM
STPS40L15CW
Bulletin PD-20622 rev. A 08/03
4www.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
FREE-WHEEL
DIODE
40HFL40S02
CURRENT
MONITOR
HIGH-SPEED
SWITCH
IRFP460
L
DUT
Rg = 25 o hm
Vd = 25 Volt
+
70
75
80
85
90
95
100
0 5 10 15 20 25
A llowable Case Temper atu re - (°C)
F(AV)
Average Forward Current - I (A)
Square wave (D = 0.50)
0
2
4
6
8
10
12
14
0 5 10 15 20 25 30
DC
Average Power Loss - (Watts)
F(AV)
RMS Lim it
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
Average Forward Curr ent - I (A)
100
1000
10 100 1000 10000
FSM
Non-Repetiti ve Surge Curr ent - I (A)
p
At Any Rated Load Condi ti on
And With Rated V Appli ed
Following Surge
RRM
Square W ave Pulse Durati on - t (microsec)
STPS40L15CW
Bulletin PD-20622 rev. A 08/03
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. 08/03
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.
