Document Number: 93950 For technical questions, contact: diodes-tech@vishay.com
www.vishay.com
Revision: 25-Jun-08 1
Schottky Rectifier, 18 A
18TQ...S
Vishay High Power Products
FEATURES
• 175 °C T
J
operation
• Low forward voltage drop
• High frequency operation
• High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
• Guard ring for enhanced ruggedness and long term
reliability
• Designed and qualified for Q101 level
DESCRIPTION
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, freewheeling diodes, and
reverse battery protection.
PRODUCT SUMMARY
I
F(AV)
18 A
V
R
35 to 45 V
D
2
PAK
Anode
1
3
Base
cathode
2
N/C
MAJOR RATINGS AND CHARACTERISTICS
SYMBOL CHARACTERISTICS VALUES UNITS
I
F(AV)
Rectangular waveform 18 A
V
RRM
Range 35 to 45 V
I
FSM
t
p
= 5 µs sine 1800 A
V
F
18 Apk, T
J
= 125 °C 0.53 V
T
J
Range - 55 to 175 °C
VOLTAGE RATINGS
PARAMETER SYMBOL 18TQ035S 18TQ040S 18TQ045S UNITS
Maximum DC reverse voltage V
R
35 40 45 V
Maximum working peak reverse voltage V
RWM
ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL TEST CONDITIONS VALUES UNITS
Maximum average forward current
See fig. 5
I
F(AV)
50 % duty cycle at T
C
= 149 °C, rectangular waveform 18 A
Maximum peak one cycle
non-repetitive surge current
See fig. 7
I
FSM
5 µs sine or 3 µs rect. pulse
Following any rated
load condition and with
rated V
RRM
applied
1800
A
10 ms sine or 6 ms rect. pulse 390
Non-repetitive avalanche energy E
AS
T
J
= 25 °C, I
AS
= 3.6 A, L = 3.7 mH 24 mJ
Repetitive avalanche current I
AR
Current decaying linearly to zero in 1 µs
Frequency limited by T
J
maximum V
A
= 1.5 x V
R
typical
3.6 A
