SCHOTTKY RECTIFIER 12 Amp
12CTQ...
12CTQ...S
12CTQ... -1
www.irf.com 1
Bulletin PD-20554 rev. B 07/01
Major Ratings and Characteristics
I
F(AV)
Rectangular 12 A
waveform
V
RRM
range 35 to 45 V
I
FSM
@ tp = 5 µs sine 690 A
V
F
@
6 Apk, T
J
= 125°C 0.53 V
(per leg)
T
J
range - 55 to 175 °C
Characteristics 12CTQ Units
Description/ Features
The 12CTQ center tap Schottky rectifier series has been
optimized for low reverse leakage at high temperature. The
proprietary barrier technology allows for reliable operation up
to 175° C junction temperature. Typical applications are in
switching power supplies, converters, free-wheeling diodes,
and reverse battery protection.
175° C T
J
operation
Center tap TO-220 package
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
12CTQ... 12CTQ... S 12CTQ... -1
TO-220 D
2
PAK
I
F(AV)
= 12Amp
V
R
= 35 to 45V
Anode
1
3
2
Base
Common
Cathode
2
node
Common
Cathode
TO-262
Anode
1
3
2
Base
Common
Cathode
2
node
Common
Cathode
Anode
1
3
2
Base
Common
Cathode
2
node
Common
Cathode
12CTQ... Series
2
Bulletin PD-20554 rev. B 07/01
www.irf.com
V
FM
Max. Forward Voltage Drop 0.60 V @ 6A
(Per Leg) * See Fig. 1 (1) 0.73 V @ 12A
0.53 V @ 6A
0.64 V @ 12A
I
RM
Max. Reverse Leakage Current 0.8 mA T
J
= 25 °C
(Per Leg) * See Fig. 2 (1) 7.0 mA T
J
= 125 °C
V
F(TO)
Threshold Voltage 0.35 V T
J
= T
J
max.
r
t
Forward Slope Resistance 18.23 mΩ
C
T
Max. Junction Capacitance (Per Leg) 400 pF V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25°C
L
S
Typical Series Inductance (Per Leg) 8.0 nH Measured lead to lead 5mm from package body
dv/dt Max. Voltage Rate of Change 10,000 V/ µs
(Rated V
R
)
T
J
Max. Junction Temperature Range -55 to 175 °C
T
stg
Max. Storage Temperature Range -55 to 175 °C
R
thJC
Max. Thermal Resistance Junction 3.50 °C/W DC operation * See Fig. 4
to Case (Per Leg)
R
thJC
Max. Thermal Resistance Junction 1.75 °C/W DC operation
to Case (Per Package)
R
thCS
Typical Thermal Resistance, Case 0.50 °C/W Mounting surface , smooth and greased
to Heatsink
wt Approximate Weight 2 (0.07) g (oz.)
T Mounting Torque Min. 6 (5)
Max. 12 (10)
Thermal-Mechanical Specifications
Kg-cm
(Ibf-in)
T
J
= 25 °C
T
J
= 125 °C
Electrical Specifications
(1) Pulse Width < 300µs, Duty Cycle <2%
V
R
= rated V
R
Absolute Maximum Ratings
Following any rated
load condition and with
rated V
RRM
applied
Parameters 12CTQ Units Conditions
I
F(AV)
Max. Average Forward (Per Leg) 6 A 50% duty cycle @ T
C
= 160°C, rectangular wave form
Current * See Fig. 5 (Per Device) 12
I
FSM
Max. Peak One Cycle Non-Repetitive 690 5µs Sine or 3µs Rect. pulse
Surge Current (Per Leg) * See Fig. 7 140 10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy 8 mJ T
J
= 25 °C, I
AS
= 1.20 Amps, L = 11.10 mH
(Per Leg)
I
AR
Repetitive Avalanche Current 1.20 A Current decaying linearly to zero in 1 µsec
(Per Leg) Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
A
Part number 12CTQ035 12CTQ040 12CTQ045
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
Voltage Ratings
35 40 45
Parameters 12CTQ Units Conditions
Parameters 12CTQ Units Conditions
12CTQ... Series
3
Bulletin PD-20554 rev. B 07/01
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)
0.0001
0.001
0.01
0.1
1
10
100
0 5 10 15 20 25 30 35 40 45
R
R
T = 175 C
150 C
125 C
100 C
75 C
50 C
25 C
J
Reverse Current - I (mA)
Reverse Voltage - V (V)
100
1000
0 1020304050
T = 25 C
J
R
T
Junction Capacitance - C (pF)
Reverse Voltage - V (V)
0.001
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
(Thermal Resistance)
1
Thermal Im pedance Z ( C/W )
1
2
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
J
DM
thJC
C
2
t
1
t
P
DM
1
2
Notes:
1. Duty factor D = t / t
2. Peak T = P x Z + T
Forward Voltage Drop - V
FM
(V)
Instantaneous Forward Current - I
F
(A)
1
10
100
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
Tj = 175˚C
Tj = 125˚C
Tj = 25˚C
