SCHOTTKY RECTIFIER
Description
Bulletin PD-20178 rev.
C 07/03
18TQ.
.
.
18TQ.
.
.
S
SCHOTTKY RECTIFIER 18 Amp
IF(AV) = 18Amp VR = 35 to 45V
Major Ratings and Characteristics Characteristics
IF(AV) Rectangular waveform VRRM range IFSM @ tp = 5 µs sine VF TJ @ 18 Apk, TJ = 125°C range
Description/Features Units
A V A V °C 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 reverse battery protection.
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 175° C TJ operation
18TQ
18 35 to 45 1800 0.
53 - 55 to 175
Case Styles 18TQ.
.
.
18TQ.
.
.
S
Base Cathode
2
Base Cathode
2
1
3
1
3
Cathode
Anode
N/C
Anode
TO-220AC www.
irf.
com
D2PAK 1
18TQ.
.
.
Series
Bulletin PD-20178 rev.
C 07/03
Voltage Ratings
Part number
VR Max.
DC Reverse Voltage (V) 35 40 45 VRWM Max.
Working Peak Reverse Voltage (V)
18TQ035
18TQ040
18TQ045
Absolute Maximum Ratings
Parameters
IF(AV) Max.
Average Forward Current * See Fig.
5 IFSM EAS IAR Max.
Peak One Cycle Non-Repetitive Surge Current * See Fig.
7 Non-Repetitive Avalanche Energy Repetitive Avalanche Current
18TQ
18 1800 390 24 3.
6
Units
A
Conditions
50% duty cycle @ TC = 149° C, rectangular wave form 5µs Sine or 3µs Rect.
pulse 10ms Sine or 6ms Rect.
pulse Following any rated load condition and with rated VRRM applied
A mJ A
TJ = 25 °C, IAS = 3.
6 Amps, L = 3.
7 mH Current decaying linearly to zero in 1 µsec Frequency limited by TJ max.
VA = 1.
5 x VR typical
Electrical Specifications
Parameters
VFM Max.
Forward Voltage Drop * See Fig.
1 (1)
18TQ
0.
60 0.
72 0.
53 0.
67
Units
V V V V mA mA pF nH V/ µs @ 18A @ 36A @ 18A @ 36A TJ = 25 °C TJ = 125 °C
Conditions
TJ = 25 °C...
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