MBR2045CT revD.pmd
SCHOTTKY RECTIFIER
20 Amp
MBR2045CT
MBRB2045CT
MBR2045CT-1
Bulletin PD-2.320 rev. D 07/03
1
www.irf.com
Major Ratings and Characteristics
I
F(AV)
Rectangular waveform
20
A
(Per Device)
I
FRM
@
T
C
= 135C
20
A
(Per Leg)
V
RRM
35/45
V
I
FSM
@ tp = 5 s sine
1060
A
V
F
@
10 Apk, T
J
= 125C
0.57
V
T
J
range
- 65 to 150
C
Characteristics
Values
Units
Description/ Features
This center tap Schottky rectifier has been optimized for low
reverse leakage at high temperature. The proprietary barrier
technology allows for reliable operation up to 150 C junction
temperature. Typical applications are in switching power
supplies, converters, free-wheeling diodes, and reverse
battery protection.
150 C T
J
operation
Center tap TO-220 and D
2
Pak packages
Low forward voltage drop
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
Case Styles
MBR20..CT
MBRB20..CT
MBR20..CT-1
TO-220
D
2
PAK
Anode
1
3
2
Base
Common
Cathode
2
Anode
Common
Cathode
TO-262
Anode
1
3
2
Base
Common
Cathode
2
Anode
Common
Cathode
Anode
1
3
2
Base
Common
Cathode
2
Anode
Common
Cathode
MBR2045CT, MBRB2045CT, MBR2045CT-1
Bulletin PD-2.320 rev. D 07/03
2
www.irf.com
T
J
Max. Junction Temperature Range
-65 to 150
C
T
stg
Max. Storage Temperature Range
-65 to 175
C
R
thJC
Max. Thermal Resistance
2.0
C/W DC operation
Junction to Case (Per Leg)
R
thCS
Typical Thermal Resistance
0.50
C/W Mounting surface, smooth and greased
Case to Heatsink
Only for TO-220
wt
Approximate Weight
2 (0.07)
g (oz.)
T
Mounting Torque
Min.
6 (5)
Non-lubricated threads
Max.
12 (10)
Thermal-Mechanical Specifications
Parameters
Values
Units
Conditions
Kg-cm
(Ibf-in)
Electrical Specifications
(1) Pulse Width < 300s, Duty Cycle <2%
I
F(AV)
Max. Average Forward (Per Leg)
10
A
@ T
C
= 135 C, (Rated V
R
)
Current
(Per Device)
20
I
FRM
Peak Repetitive Forward
20
A
Rated V
R
, square wave, 20kHz
Current
(Per Leg)
T
C
= 135 C
I
FSM
Non Repetitive Peak
1060
5s Sine or 3s
Surge Current
Rect. pulse
Surge applied at rated load conditions halfwave,
single phase, 60Hz
E
AS
Non-Repetitive Avalanche Energy
8
mJ
(Per Leg) T
J
= 25 C, I
AS
= 2 Amps, L = 4 mH
I
AR
Repetitive Avalanche Current
2
A
Current decaying linearly to zero in 1 sec
(Per Leg)
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Absolute Maximum Ratings
Parameters
Values
Units
Conditions
Following any rated load condition
and with rated V
RRM
applied
A
150
V
FM
Max. Forward Voltage Drop
0.84
V
@ 20A
T
J
= 25 C
(1)
0.57
V
@ 10A
0.72
V
@ 20A
I
RM
Max. Instantaneus Reverse Current
0.1
mA
T
J
= 25 C
(1)
15
mA
T
J
= 125 C
V
F(TO)
Threshold Voltage
0.354
V
T
J
= T
J
max.
r
t
Forward Slope Resistance
17.6
m
C
T
Max. Junction Capacitance
600
pF
V
R
= 5V
DC
(test signal range 100Khz to 1Mhz) 25C
L
S
Typical Series Inductance
8.0
nH
Measured from top of terminal to mounting plane
dv/dt Max. Voltage Rate of Change
10000
V/ s
(Rated V
R
)
Parameters
Values
Units
Conditions
Rated DC voltage
T
J
= 125 C
MBR2035CT
MBR2045CT
MBRB2035CT
MBRB2045CT
MBR2035CT-1
MBR2045CT-1
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
35
45
Voltage Ratings
Parameters
MBR2045CT, MBRB2045CT, MBR2045CT-1
Bulletin PD-2.320 rev. D 07/03
3
www.irf.com
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage (Per Leg)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage (Per Leg)
Fig. 4 - Max. Thermal Impedance Z
thJC
Characteristics (Per Leg)
Fig. 1 - Max. Forward Voltage Drop Characteristics
(Per Leg)
1
10
100
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
F
FM
T = 150C
T = 125C
T = 25C
J
J
J
Forward Voltage Drop - V (V)
I
n
s
t
a
n
t
a
n
eou
s
F
o
r
w
a
r
d Cu
r
r
en
t
-
I
(
A
)
0.0001
0.001
0.01
0.1
1
10
100
0
5
10 15 20 25 30 35 40 45
R
R
100C
75C
50C
25C
R
e
v
e
rs
e
C
u
rre
n
t
-
I
(
m
A
)
Reverse Voltage - V (V)
T = 150C
J
125C
100
1000
0
10
20
30
40
50
R
T
J
u
n
c
t
i
o
n
C
a
pac
i
t
an
c
e
-
C
(
p
F
)
Reverse Voltage - V (V)
T = 25C
J
0.01
0.1
1
10
0.00001
0.0001
0.001
0.01
0.1
1
10
100
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
)
Notes:
1. Duty factor D = t / t
2. Peak T = P x Z + T
1
2
J
thJC
C
DM
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
2
t
1
t
P
DM
MBR2045CT, MBRB2045CT, MBR2045CT-1
Bulletin PD-2.320 rev. D 07/03
4
www.irf.com
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
(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
= rated V
R
120
125
130
135
140
145
150
0
3
6
9
12
15
DC
A
l
l
o
wa
bl
e
Ca
s
e
T
e
m
per
at
u
r
e -
(
C
)
F(AV)
see note (2)
Average Forward Current - I (A)
Square wave (D = 0.50)
Rated V applied
R
0
2
4
6
8
10
0
2
4
6
8
10
12
14
16
DC
A
v
e
r
ag
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
epe
t
i
t
i
v
e
S
u
r
g
e C
u
r
r
en
t
-
I
(
A
)
p
At Any Rated Load Condition
And With Rated V Applied
Following Surge
RRM
Square Wave Pulse Duration - t (microsec)
MBR2045CT, MBRB2045CT, MBR2045CT-1
Bulletin PD-2.320 rev. D 07/03
5
www.irf.com
3.78 (0.15)
3.54 (0.14)
10.54 (0.41)
MAX.
DIA.
15.24 (0.60)
14.84 (0.58)
2.92 (0.11)
2.54 (0.10)
1
TERM 2
14.09 (0.55)
13.47 (0.53)
3.96 (0.16)
3.55 (0.14)
0.94 (0.04)
0.69 (0.03)
4.57 (0.18)
4.32 (0.17)
3
0.61 (0.02) MAX.
5.08 (0.20) REF.
1.32 (0.05)
1.22 (0.05)
6.48 (0.25)
6.23 (0.24)
2
0.10 (0.004)
1.40 (0.05)
1.15 (0.04)
2.89 (0.11)
2.64 (0.10)
1
3
2.04 (0.080) MAX.
2
2
Dimensions in millimeters and (inches)
Conform to JEDEC outline TO-220AB
2
BASE
COMMON
CATHODE
1
2
3
ANODE
COMMON
CATHODE
ANODE
1
2
Outline Table
35 = 35V
45 = 45V
Ordering Information Table
Device Code
1
5
2
4
3
1
-
Essential Part Number
2
-
B = Surface Mount
None = TO-220
3
-
Current Rating
4
-
Voltage code: Code = V
RRM
5
-
CT= Essential Part Number
6
-
-1 = TO-262
None = TO-220
MBR
B
20
45
CT
-1
6
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