SCHOTTKY RECTIFIER
35 Amp, 45V
35SCGQ045
The 35SCGQ045 center tap Schottky rectifier has been
expressly designed to meet the rigorous requirements of hi-
rel environments. It is packaged in the hermetic isolated
TO-254AA package. The device's forward voltage drop
and reverse leakage current are optimized for the lowest
power loss and the highest circuit efficiency for typical high
frequency switching power supplies and resonent power
converters. Full MIL-PRF-19500 quality conformance
testing is available on source control drawings to
TX, TXV and S quality levels.
Hermetically Sealed
Center Tap
Low Forward Voltage Drop
High Frequency Operation
Guard Ring for Enhanced Ruggedness and Long term
Reliability
Lightweight
Major Ratings and Characteristics
Description/Features
10/04/00
CASE STYLE
www.irf.com
1
Characteristics
35SCGQ045 Units
I
F(AV)
35
A
V
RRM
(Per Leg)
45
V
I
FSM
@ tp = 8.3ms half-sine
(Per Leg)
200
A
V
F
@ 30Apk, T
J
=125C
0.74
V
(Per Leg)
T
J
, T
stg
Operating and storage
-55 to 150
C
ANODE COMMON ANODE
CATHODE
2
1
3
HIGH EFFICIENCY SERIES
3.7 8 ( .149 )
3.5 3 ( .139 )
-A-
13 .8 4 ( .5 45 )
13 .5 9 ( .5 35 )
6 .6 0 ( .26 0 )
6 .3 2 ( .24 9 )
20 .3 2 ( .8 00 )
20 .0 7 ( .7 90 )
1 3.84 ( .5 45 )
1 3.59 ( .5 35 )
-C-
1.14 ( .04 5 )
0.89 ( .03 5 )
3 .8 1 ( .1 50 )
1 .2 7 ( .0 50 )
1 .0 2 ( .0 40 )
-B-
.12 ( .0 05 )
3X
2X
3.81 ( .15 0 )
1 2 3
17 .4 0 ( .6 85 )
16 .8 9 ( .6 65 )
3 1.40 ( 1.2 35 )
3 0.39 ( 1.1 99 )
.50 ( .0 20 ) M C A M B
.25 ( .0 10 ) M C
L EGE ND
1 - CO LL
2 - E MIT
3 - GA TE
IR Case Style TO-254AA
PD -93965
35SCGQ045
2
www.irf.com
Part number
35SCGQ045
V
R
Max. DC Reverse Voltage (V) (Per Leg)
V
RWM
Max. Working Peak Reverse Voltage (V) (Per Leg)
Voltage Ratings
45
Parameters
Limits Units
Conditions
I
F(AV)
Max. Average Forward Current
35
A
50% duty cycle @ T
C
= 116 C, square waveform
See Fig. 5
I
FSM
Max. Peak One Cycle Non - Repetitive
200
A
@ t
p
= 8.3 ms half-sine
Surge Current (Per Leg)
Absolute Maximum Ratings
Pulse Width < 300s, Duty Cycle < 2%
Parameters
Limits
Units
Conditions
V
FM
Max. Forward Voltage Drop
0.61
V
@ 15A
T
J
= -55C
(Per Leg) See Fig. 1
0.74
V
@ 30A
0.54
V
@ 15A
T
J
= 25C
0.73
V
@ 30A
0.47
V
@ 15A
T
J
= 125C
0.74
V
@ 30A
I
RM
Max. Reverse Leakage Current
0.70
mA
T
J
= 25C
(Per Leg) See Fig. 2
75
mA
T
J
= 100C
V
R
= rated V
R
160
mA
T
J
= 125C
C
T
Max. Junction Capacitance (Per Leg)
2000
pF
V
R
= 5V
DC
( 1MHz, 25C )
L
S
Typical Series Inductance (Per Leg)
7.8
nH
Measured from anode lead to cathode lead
6mm ( 0.025 in.) from package
Electrical Specifications
Parameters
Limits
Units
Conditions
T
J
Max.Junction Temperature Range
-55 to 150
C
T
stg
Max. Storage Temperature Range
-55 to 150
C
R
thJC
Max. Thermal Resistance, Junction
1.25
C/W
DC operation
See Fig. 4
to Case (Per Leg)
R
thJC
Max. Thermal Resistance, Junction
0.63
C/W
DC operation
to Case (Per Package)
wt
Weight (Typical)
9.3 g
Die Size (Typical)
150X180 mils
Thermal-Mechanical Specifications
Case Style
TO-254AA
35SCGQ045
www.irf.com
3
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage (Per Leg)
Fig. 3 - Typical Junction Capacitance Vs.
Reverse Voltage (Per Leg)
Fig. 1 - Max. Forward Voltage Drop Characteristics
(Per Leg)
0.0
0.2
0.4
0.6
0.8
1.0
Forward Voltage Drop - V F (V)
1
10
100
Instantaneous Forward Current - I
F
(A)
Tj = -55C
Tj = 125C
Tj = 25C
0
10
20
30
40
50
Reverse Voltage - VR (V)
0.01
0.1
1
10
100
1000
Reverse Current - I
R
( mA )
125C
75C
25C
100C
0
10
20
30
40
50
Reverse Voltage -V R (V)
100
1000
10000
Junction Capacitance - C
T
(pF)
TJ = 25C
35SCGQ045
4
www.irf.com
Fig. 5 - Max. Allowable Case Temperature Vs.
Average Forward Current (Per Leg)
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
IR EUROPEAN REGIONAL CENTRE: 439/445 Godstone Rd, Whyteleafe, Surrey CR3 OBL, UK Tel: ++ 44 (0)20 8645 8000
IR CANADA: 15 Lincoln Court, Brampton, Ontario L6T3Z2, Tel: (905) 453 2200
IR GERMANY: Saalburgstrasse 157, 61350 Bad Homburg Tel: ++ 49 (0) 6172 96590
IR ITALY: Via Liguria 49, 10071 Borgaro, Torino Tel: ++ 39 011 451 0111
IR JAPAN: K&H Bldg., 2F, 30-4 Nishi-Ikebukuro 3-Chome, Toshima-Ku, Tokyo 171 Tel: 81 (0)3 3983 0086
IR SOUTHEAST ASIA: 1 Kim Seng Promenade, Great World City West Tower, 13-11, Singapore 237994 Tel: ++ 65 (0)838 4630
IR TAIWAN:16 Fl. Suite D. 207, Sec. 2, Tun Haw South Road, Taipei, 10673 Tel: 886-(0)2 2377 9936
Data and specifications subject to change without notice. 10/00
Fig. 4 - Max. Thermal Impedance Z
thJC
Characteristics (Per Leg)
0.01
0.1
1
10
0.00001
0.0001
0.001
0.01
0.1
1
Notes:
1. Duty factor D = t / t
2. Peak T = P
x Z
+ T
1
2
J
DM
thJC
C
P
t
t
DM
1
2
t , Rectangular Pulse Duration (sec)
Thermal Response
(Z )
1
thJC
0.01
0.02
0.05
0.10
0.20
D = 0.50
SINGLE PULSE
(THERMAL RESPONSE)
0
10
20
30
40
50
60
Average Forward Current - I F(AV) (A)
0
20
40
60
80
100
120
140
160
180
Allowable Case Temprature - (C)
35SCGQ045
R thJC = 1.25C/W
DC
PDF 
ZIP