18TQ0..PbF Series
Vishay High Power Products
Schottky Rectifier, 18 A
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Base |
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cathode |
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TO-220AC |
Cathode |
Anode |
PRODUCT SUMMARY
IF(AV) |
18 A |
VR |
35 V to 50 V |
FEATURES
• 175 °C TJ 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
•Compliant to RoHS directive 2002/95/EC
•Designed and qualified for industrial level
DESCRIPTION
The 18TQ...PbF 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.
MAJOR RATINGS AND CHARACTERISTICS |
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CHARACTERISTICS |
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VALUES |
UNITS |
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IF(AV) |
Rectangular waveform |
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18 |
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A |
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VRRM |
Range |
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35 to 50 |
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V |
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IFSM |
tp = 5 μs sine |
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1800 |
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A |
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VF |
18 Apk, TJ = 125 °C |
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0.53 |
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V |
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TJ |
Range |
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- 55 to 175 |
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°C |
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VOLTAGE RATINGS |
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PARAMETER |
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SYMBOL |
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18TQ035PbF |
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18TQ040PbF |
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18TQ045PbF |
18TQ050PbF |
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UNITS |
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Maximum DC reverse voltage |
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VR |
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35 |
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40 |
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45 |
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50 |
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V |
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Maximum working peak reverse voltage |
VRWM |
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ABSOLUTE MAXIMUM RATINGS |
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PARAMETER |
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SYMBOL |
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TEST CONDITIONS |
VALUES |
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UNITS |
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Maximum average forward current |
IF(AV) |
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50 % duty cycle at TC = 149 °C, rectangular waveform |
18 |
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See fig. 5 |
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A |
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Maximum peak one cycle |
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5 μs sine or 3 μs rect. pulse |
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Following any rated load |
1800 |
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non-repetitive surge current |
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IFSM |
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condition and with rated |
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10 ms sine or 6 ms rect. pulse |
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390 |
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See fig. 7 |
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VRRM applied |
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Non-repetitive avalanche energy |
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EAS |
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TJ = 25 °C, IAS = 3.6 A, L = 3.7 mH |
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mJ |
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Repetitive avalanche current |
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IAR |
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Current decaying linearly to zero in 1 μs |
3.6 |
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A |
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Frequency limited by TJ maximum VA = 1.5 x VR typical |
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* Pb containing terminations are not RoHS compliant, exemptions may apply |
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Document Number: 94149 |
For technical questions, contact: diodestech@vishay.com |
www.vishay.com |
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Revision: 10-Nov-09 |
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1 |
18TQ0..PbF Series
Vishay High Power Products |
Schottky Rectifier, 18 A |
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ELECTRICAL SPECIFICATIONS |
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PARAMETER |
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SYMBOL |
TEST CONDITIONS |
VALUES |
UNITS |
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18 A |
TJ = 25 °C |
0.60 |
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Maximum forward voltage drop |
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VFM (1) |
36 A |
0.72 |
V |
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See fig. 1 |
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18 A |
TJ = 125 °C |
0.53 |
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36 A |
0.67 |
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Maximum reverse leakage current |
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IRM (1) |
TJ = 25 °C |
VR = Rated VR |
2.5 |
mA |
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See fig. 2 |
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TJ = 125 °C |
25 |
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Maximum junction capacitance |
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CT |
VR = 5 VDC (test signal range 100 kHz to 1 MHz) 25 °C |
1400 |
pF |
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Typical series inductance |
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LS |
Measured lead to lead 5 mm from package body |
8 |
nH |
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Maximum voltage rate of change |
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dV/dt |
Rated VR |
10 000 |
V/μs |
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Note |
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(1) Pulse width < 300 μs, duty cycle < 2 % |
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THERMAL - MECHANICAL SPECIFICATIONS |
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PARAMETER |
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SYMBOL |
TEST CONDITIONS |
VALUES |
UNITS |
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Maximum junction and storage |
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TJ, TStg |
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- 55 to 175 |
°C |
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temperature range |
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Maximum thermal resistance, |
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RthJC |
DC operation |
1.50 |
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junction to case |
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See fig. 4 |
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°C/W |
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Typical thermal resistance, |
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RthCS |
Mounting surface, smooth and greased |
0.50 |
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case to heatsink |
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Approximate weight |
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2 |
g |
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0.07 |
oz. |
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Mounting torque |
minimum |
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6 (5) |
kgf · cm |
maximum |
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12 (10) |
(lbf in) |
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18TQ035 |
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Marking device |
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Case style TO-220AC |
18TQ040 |
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18TQ045 |
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18TQ050 |
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www.vishay.com |
For technical questions, contact: diodestech@vishay.com |
Document Number: 94149 |
2 |
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Revision: 10-Nov-09 |
18TQ0..PbF Series
Schottky Rectifier, 18 A Vishay High Power Products
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1000 |
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<![if ! IE]> <![endif]>InstantaneousForward |
100 |
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10 |
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TJ = 175 °C |
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TJ = 125 °C |
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TJ = 25 °C |
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1 |
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<![if ! IE]> <![endif]>(A)Current |
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<![if ! IE]> <![endif]>- |
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<![if ! IE]> <![endif]>F |
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<![if ! IE]> <![endif]>I |
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0.1 |
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0 |
0.2 |
0.4 |
0.6 |
0.8 |
1.0 |
1.2 |
1.4 |
1.6 |
VFM - Forward Voltage Drop (V)
Fig. 1 - Maximum Forward Voltage Drop Characteristics
<![endif]>IR - Reverse Current (mA)
1000 |
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100 |
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TJ = 175 °C |
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10 |
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TJ = 150 °C |
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TJ = 125 °C |
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1 |
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TJ = 100 °C |
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0.1 |
TJ |
= 75 °C |
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0.01 TJ = 50 °C
0.001
TJ = 25 °C
0.0001
0 |
10 |
20 |
30 |
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50 |
VR - Reverse Voltage (V)
Fig. 2 - Typical Values of Reverse Current vs. Reverse Voltage
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10 000 |
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<![if ! IE]> <![endif]>(pF) |
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<![if ! IE]> <![endif]>- Junction Capacitance |
1000 |
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<![if ! IE]> <![endif]>T |
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<![if ! IE]> <![endif]>C |
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100 |
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0 |
10 |
20 |
30 |
40 |
50 |
VR - Reverse Voltage (V)
Fig. 3 - Typical Junction Capacitance vs. Reverse Voltage
<![if ! IE]> <![endif]>(°C/W) |
10 |
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<![if ! IE]> <![endif]>Impedance |
1 |
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0.1 |
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D = 0.50 |
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PDM |
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<![if ! IE]> <![endif]>- Thermal |
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D = 0.33 |
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t1 |
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D = 0.25 |
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t2 |
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0.01 |
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D = 0.17 |
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Notes: |
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Single pulse |
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D = 0.08 |
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<![if ! IE]> <![endif]>thJC |
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1. Duty factor D = t1/t2 . |
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(thermal resistance) |
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2. Peak TJ |
= PDM x ZthJC |
+ TC |
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<![if ! IE]> <![endif]>Z |
0.001 |
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0.00001 |
0.0001 |
0.001 |
0.01 |
0.1 |
1 |
10 |
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100 |
t1 - Rectangular Pulse Duration (s)
Fig. 4 - Maximum Thermal Impedance ZthJC Characteristics
Document Number: 94149 |
For technical questions, contact: diodestech@vishay.com |
www.vishay.com |
Revision: 10-Nov-09 |
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