Generic 18TQ045

Cross Number:

Item Description: DIODE SCHOTTKY 45V 18A TO220AC

Qty Price
1 + $0.30000



Other Cross Reference

Manufacturer Date Code Qty Available Qty
N/A 9537
  • Freelance Stock: 17
    Ships Immediately





Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

Major Ratings and Characteristics
I
F(AV)
Rectangular 18 A
waveform
V
RRM
range 35 to 45 V
I
FSM
@ tp = 5 µs sine 1800 A
V
F
@
18 Apk, T
J
= 125°C 0.53 V
T
J
range - 55 to 175 °C
Characteristics 18TQ Units
Description/Features
The 18TQ 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 re-
verse battery protection.
175° C T
J
operation
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
Bulletin PD-20178 rev. C 07/03
18TQ...
18TQ...S
I
F(AV)
= 18Amp
V
R
= 35 to 45V
SCHOTTKY RECTIFIER
18 Amp
1www.irf.com
Case Styles
18TQ...
TO-220AC
18TQ... S
D
2
PAK
Anode
1
3
Base
Cathode
2
N/C
Anode
1
3
Cathode
Base
Cathode
2
18TQ... Series
2
Bulletin PD-20178 rev. C 07/03
www.irf.com
V
FM
Max. Forward Voltage Drop (1) 0.60 V @ 18A
* See Fig. 1 0.72 V @ 36A
0.53 V @ 18A
0.67 V @ 36A
I
RM
Max. Reverse Leakage Current (1) 2.5 mA T
J
= 25 °C
* See Fig. 2 25 mA T
J
= 125 °C
C
T
Max. Junction Capacitance 1400 pF V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25 °C
L
S
Typical Series Inductance 8.0 nH Measured lead to lead 5mm from package body
dv/dt Max. Voltage Rate of Change 10000 V/ µs
(Rated V
R
)
T
J
= 25 °C
T
J
= 125 °C
V
R
= rated V
R
Electrical Specifications
Parameters 18TQ Units Conditions
(1) Pulse Width < 300µs, Duty Cycle < 2%
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 1.50 °C/W DC operation * See Fig. 4
to Case
R
thCS
Typical Thermal Resistance, Case to 0.50 °C/W Mounting surface , smooth and greased
Heatsink
wt Approximate Weight 2 (0.07) g (oz.)
T Mounting Torque Min. 6 (5)
Max. 12 (10)
Thermal-Mechanical Specifications
Parameters 18TQ Units Conditions
Kg-cm
(Ibf-in)
I
F(AV)
Max. Average Forward Current 18 A 50% duty cycle @ T
C
= 149° C, rectangular wave form
* See Fig. 5
I
FSM
Max. Peak One Cycle Non-Repetitive 1800 5µs Sine or 3µs Rect. pulse
Surge Current * See Fig. 7 390 10ms Sine or 6ms Rect. pulse
E
AS
Non-Repetitive Avalanche Energy 24 mJ T
J
= 25 °C, I
AS
= 3.6 Amps, L = 3.7 mH
I
AR
Repetitive Avalanche Current 3.6 A Current decaying linearly to zero in 1 µsec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Parameters 18TQ Units Conditions
Absolute Maximum Ratings
A
Following any rated
load condition and
with rated V
RRM
applied
Part number 18TQ035 18TQ040 18TQ045
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
35 40 45
Voltage Ratings
18TQ... Series
3
Bulletin PD-20178 rev. C 07/03
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 Z
thJC
Characteristics
100
1000
10000
0 1020304050
T = 25°C
J
Reverse Voltage - V (V)
R
T
Junction Capacitance - C (pF)
. 001
.01
.1
1
10
. 00001 . 0001 . 001 . 01 . 1 1 10 100
D = 0. 33
D = 0. 50
D = 0. 25
D = 0. 17
D = 0. 08
1
thJC
t , Rect angular Pulse Durat ion (Seconds)
Ther mal Impedance - Z C/W)
Single Pulse
(Thermal Resistance)
2
t
1
t
P
DM
Not es:
1. Duty factor D = t / t
2. Peak T = P x Z + T
1
JDM
thJC C
2
Fig. 1 - Maximum Forward Voltage Drop Characteristics
.1
1
10
100
1000
0 .2.4.6.8 11.21.41.6
FM
F
Inst antaneous Forward Current - I (A)
T = 175°C
T = 125°C
T = 25°C
J
J
J
For ward Voltage Drop - V (V)
. 0001
. 001
.01
.1
1
10
100
1000
0 5 10 15 20 25 30 35 40 4
5
R
R
T = 175°C
150°C
125°C
100°C
75°C
50°C
25°C
J
Reverse Vol tage - V (V)
Reverse Current - I (mA)
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