Vishay 25CTQ..., 25CTQ...S, 25CTQ.. -1 Data Sheet
Bulletin PD-20242 rev. B 07/03
A
A
A
25CTQ...
25CTQ...S
25CTQ.. -1
SCHOTTKY RECTIFIER
Major Ratings and Characteristics Description/ Features
Characteristics 25CTQ Units
I
Rectangular 30 A
F(AV)
waveform
V
range 35 to 45 V
RRM
I
@ tp = 5 µs sine 990 A
FSM
VF@ 15 Apk, TJ=125°C 0.50 V
(per leg)
TJrange - 55 to 150 °C
The 25CTQ center tap Schottky rectifier series has been
optimized for very low forward voltage drop, with moderate
leakage. 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 TJ operation
Center tap TO-220 package
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Very low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
Case Styles
30 Amp
I
= 30Amp
F(AV)
VR = 35 to 45V
25CTQ... 25CTQ... S 25CTQ... -1
Base
Common
Cathode
2
2
1
Common
3
Cathode
node
Anode
TO-220 D
node
1
Base
Common
Cathode
Common
Cathode
2
PAK
Base
Common
node
Cathode
2
2
1
Common
3
Cathode
Anode
2
2
3
Anode
TO-262
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25CTQ... Series
Bulletin PD-20242 rev. B 07/03
Voltage Ratings
Part number 25CTQ035 25CTQ040 25CTQ045
VRMax. DC Reverse Voltage (V)
V
Max. Working Peak Reverse Voltage (V)
RWM
35 40 45
Absolute Maximum Ratings
Parameters 25CTQ Units Conditions
I
Max. Average Forward Current 3 0 A 50% duty cycle @ TC = 102 °C, rectangular wave form
F(AV)
* See Fig. 5
I
Max. Peak One Cycle Non-Repetitive 9 90 5µs Sine or 3µs Rect. pulse
FSM
Surge Current (Per Leg) * See Fig. 7 250 10ms Sine or 6ms Rect. pulse
EASNon-Repetitive Avalanche Energy 20 mJ T
(Per Leg)
I
Repetitive Avalanche Current 3 A Current decaying linearly to zero in 1 µsec
AR
(Per Leg) Frequency limited by TJ max. VA = 1.5 x VR typical
A
= 25 °C, I
J
= 3 Amps, L = 4.40 mH
AS
Following any rated
load condition and with
rated V
RRM
applied
Electrical Specifications
Parameters 25CTQ Units Conditions
VFMMax. Forward Voltage Drop 0.56 V @ 15A
(Per Leg) * See Fig. 1 (1) 0.71 V @ 30A
0.50 V @ 15A
0.64 V @ 30A
IRMMax. Reverse Leakage Current 1.75 mA TJ = 25 °C
(Per Leg) * See Fig. 2 (1) 70 mA TJ = 125 °C
CTMax. Junction Capacitance (Per Leg) 900 pF VR = 5VDC (test signal range 100Khz to 1Mhz) 25°C
LSTypical Series Inductance (Per Leg) 8.0 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 V
(1) Pulse Width < 300µs, Duty Cycle <2%
R
Thermal-Mechanical Specifications
Parameters 25CTQ Units Conditions
TJMax. Junction Temperature Range -55 to 150 °C
T
Max. Storage Temperature Range -55 to 150 °C
stg
R
Max. Thermal Resistance Junction 3.25 °C/W DC operation * See Fig. 4
thJC
to Case (Per Leg)
R
Max. Thermal Resistance Junction 1.63 °C/W DC operation
thJC
to Case (Per Package)
R
Typical Thermal Resistance, Case 0.50 °C/W Mounting surface , smooth and greased
thCS
to Heatsink
wt Approximate Weight 2.0 (0.07) g (oz.)
T Mounting Torque Min. 6 (5)
Max. 12 (10)
2
Kg-cm
(Ibf-in)
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25CTQ... Series
Bulletin PD-20242 rev. B 07/03
1000
100
F
10
1000
T = 150°C
J
100
10
R
1
.1
Rever se Cur rent - I (mA)
.01
.001
125°C
100°C
75°C
50°C
25°C
0 5 10 15 20 25 30 35 40 45
Rever se Voltage - V (V)
Fig. 2 - Typical Values Of Reverse Current
R
Vs. Reverse Voltage (Per Leg)
T = 150°C
J
T = 125°C
J
Inst antaneous Forward Current - I (A)
1
T = 25°C
J
1000
T
T = 25°C
J
Junct ion Capacit ance - C (pF)
.1
0.2.4.6.811.21.41.61.82
Fig. 1 - Max. Forward Voltage Drop Characteristics
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100
0 1020304050
Forward Voltage Drop - V (V)
FM
Reverse Voltage - V (V)
Fig. 3 - Typical Junction Capacitance
(Per Leg)
10
D = 0. 50
D = 0. 33
1
D = 0. 25
thJC
Ther mal I mpedance - Z (°C/W)
D = 0.17
D = 0. 08
.1
.01
Si ngle Pul se
(Thermal Resist ance)
.001
.00001 . 0001 .001 .01 .1 1 10 100
t , Rect angul ar Pulse Durat io n (Seconds)
1
Fig. 4 - Max. Thermal Impedance Z
thJC
Not es :
1. Duty factor D = t / t
2. Peak T = P x Z + T
Characteristics (Per Leg)
Vs. Reverse Voltage (Per Leg)
P
DM
t
1
t
2
1
JDMthJCC
R
2
3
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