Vishay 20TQ...PbF Series Data Sheet

TO-220AC

Schottky Rectifier, 20 A

FEATURES

• 150 °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

• Lead (Pb)-free (“PbF” suffix)

• Designed and qualified for industrial level

cathode

1

Cathode

Base

2

3

Anode

20TQ...PbF Series

Vishay High Power Products

Pb-free

Available

RoHS*

COMPLIANT

PRODUCT SUMMARY

I

F(AV)

V

R

20 A

35 to 45 V

DESCRIPTION

The 20TQ...PbF Schottky rectifier series has been optimized
for very low forward voltage drop, with moderate leakage.
The proprietary barrier technology allows for reliable
operation up to 150 °C junction temperature. Typical
applications are in switching power supplies, converters,
freewheeling diodes, and reverse battery protection.

MAJOR RATINGS AND CHARACTERISTICS

SYMBOL CHARACTERISTICS VALUES UNITS

I

F(AV)

V

RRM

I

FSM

V

F

T

J

Rectangular waveform 20 A

Range 35 to 45 V

tp = 5 µs sine 1800 A

20 Apk, TJ = 125 °C 0.51 V

Range - 55 to 150 °C

VOLTAGE RATINGS

PARAMETER SYMBOL 20TQ035PbF 20TQ040PbF 20TQ045PbF UNITS

Maximum DC reverse voltage V

Maximum working peak reverse voltage V

R

RWM

35 40 45 V

ABSOLUTE MAXIMUM RATINGS

PARAMETER SYMBOL TEST CONDITIONS VALUES UNITS

Maximum average forward current
See fig. 5

Maximum peak one cycle
non-repetitive surge current
See fig. 7

Non-repetitive avalanche energy E

Repetitive avalanche current I

* Pb containing terminations are not RoHS compliant, exemptions may apply

Document Number: 94167 For technical questions, contact: [e-mail]
Revision: 05-Jun-08 1

I

F(AV)

I

FSM

AR

AS

50 % duty cycle at TC = 116 °C, rectangular waveform 20

5 µs sine or 3 µs rect. pulse

10 ms sine or 6 ms rect. pulse 400

TJ = 25 °C, IAS = 4 A, L = 3.4 mH 27 mJ

Current decaying linearly to zero in 1 µs
Frequency limited by T

maximum VA = 1.5 x VR typical

J

Following any rated load
condition and with rated
V

applied

RRM

1800

4A

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A

20TQ...PbF Series

Vishay High Power Products

Schottky Rectifier, 20 A

ELECTRICAL SPECIFICATIONS

PARAMETER SYMBOL TEST CONDITIONS VALUES UNITS

20 A

Maximum forward voltage drop

See fig. 1

V

FM

40 A 0.73

(1)

20 A

40 A 0.67

Maximum reverse leakage curent
See fig. 2

I

RM

Maximum junction capacitance C

Typical series inductance L

(1)

T

S

TJ = 25 °C

T

= 125 °C 105

J

VR = 5 VDC, (test signal range 100 kHz to 1 MHz) 25 °C 1400 pF

Measured lead to lead 5 mm from package body 8.0 nH

Maximum voltage rate of change dV/dt Rated V

T

= 25 °C

J

= 125 °C

T

J

V

= Rated V

R

R

R

0.57

0.51

2.7

10 000 V/µs

Note

(1)

Pulse width < 300 µs, duty cycle < 2 %

THERMAL - MECHANICAL SPECIFICATIONS

PARAMETER SYMBOL TEST CONDITIONS VALUES UNITS

Maximum junction and
storage temperature range

Maximum thermal resistance,
junction to case

Typical thermal resistance,
case to heatsink

Approximate weight

Mounting torque

minimum 6 (5)

maximum 12 (10)

Marking device Case style TO-220AC

T

, T

J

Stg

DC operation

R

thJC

R

thCS

See fig. 4

Mounting surface, smooth and greased 0.50

- 55 to 150 °C

1.50

2g

0.07 oz.

kgf · cm

(lbf · in)

20TQ035

20TQ040

20TQ045

V

mA

°C/W

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Document Number: 94167

2 Revision: 05-Jun-08

20TQ...PbF Series

1000

100

10

Current (A)

1

- Instantaneous Forward

F

I

0.1
0

0.2 0.4 1.2 1.6 1.8

0.6 0.8 1.0 1.4

V

- Forward Voltage Drop (V)

FM

TJ = 150 °C
T

= 125 °C

J

T

= 25 °C

J

Schottky Rectifier, 20 A

- Reverse Current (mA)

R

I

Vishay High Power Products

1000

100

10

1

0.1

0.01

0.001

5 15253545

0203040

10

V

TJ = 150 °C

TJ = 125 °C

TJ = 100 °C

TJ = 75 °C

TJ = 50 °C

TJ = 25 °C

- Reverse Voltage (V)

R

Fig. 1 - Maximum Forward Voltage Drop Characteristics Fig. 2 - Typical Values of Reverse Current vs.

Reverse Voltage

10 000

1000

- Junction Capacitance (pF)

T

C

100

10 4020 30 50

0

V

R

TJ = 25 °C

- Reverse Voltage (V)

Fig. 3 - Typical Junction Capacitance vs. Reverse Voltage

10

1

P

0.1

D = 0.50

0.01

- Thermal Impedance (°C/W)

thJC

Z

0.001

0.00001 0.0001 0.001 0.01 0.1 1 10 100

Single pulse

(thermal resistance)

D = 0.33
D = 0.25
D = 0.17
D = 0.08

Notes:

1. Duty factor D = t

2. Peak TJ = PDM x Z

DM

t

1

1/t2

thJC

t1 - Rectangular Pulse Duration (s)

Fig. 4 - Maximum Thermal Impedance Z

Characteristics

thJC

t

2

.

+ T

C

.

Document Number: 94167 For technical questions, contact: [e-mail]

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Revision: 05-Jun-08 3

20TQ...PbF Series

Vishay High Power Products

155

20TQ

(DC) = 1.50 °C/W

R

thJC

145

135

DC

125

Allowable Case Temperature (°C)

115

01015

530

I

- Average Forward Current (A)

F(AV)

Fig. 5 - Maximum Allowable Case Temperature vs.

Average Forward Current

20

10 000

Schottky Rectifier, 20 A

Average Power Loss (W)

25

18

D = 0.08

16

D = 0.17
D = 0.25

14

D = 0.33
D = 0.50

12

10

8

6

4

2

0

5

0

I

F(AV)

10 15 20 25 30

- Average Forward Current (A)

DC

Fig. 6 - Forward Power Loss Characteristics

RMS limit

1000

Current (A)

- Non-Repetitive Surge

FSM

I

100

At any rated load condition and
with rated V
following surge

10

tp - Square Wave Pulse Duration (µs)

Fig. 7 - Maximum Non-Repetitive Surge Current

D.U.T.

Current
monitor

Fig. 8 - Unclamped Inductive Test Circuit

RRM

100

L

IRFP460

= 25 Ω

R

g

applied

1000

Freewheel

diode

40HFL40S02

10 000

High-speed

switch

V

= 25 V

d

+

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Document Number: 94167

4 Revision: 05-Jun-08

20TQ...PbF Series

ORDERING INFORMATION TABLE

Device code

Tube standard pack quantity: 50 pieces

Schottky Rectifier, 20 A

Vishay High Power Products

20 T Q 045 PbF

51324

1 - Current rating (20 = 20 A)

2 - Package:

T = TO-220

3

- Schottky “Q” series

4 - Voltage ratings

5 - None = Standard production

PbF = Lead (Pb)-free

035 = 35 V
040 = 40 V
045 = 45 V

LINKS TO RELATED DOCUMENTS

Dimensions http://www.vishay.com/doc?95221

Part marking information http://www.vishay.com/doc?95224

Document Number: 94167 For technical questions, contact: [e-mail]
Revision: 05-Jun-08 5

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DIMENSIONS in millimeters and inches

(6)

E

(7)

E2

Q

(6)

D

D1

13

L3

L4

2

A

Ø P

0.014 AB

Detail B

L

MM

C

(6)

H1

(7)

TO-220AC

B

Seating

plane

A

A

A1

Outline Dimensions

Vishay Semiconductors

123

DL1D

H1

θ

E

Thermal pad

D2 (6)

E1 (6)

2 x b2 2 x b

Lead assignments

Diodes
1 + 2 - Cathode

3 - Anode

CC

Detail B

Lead tip

SYMBOL

e1

MM

0.015 AB

c

MILLIMETERS INCHES

MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX.

A

A2

View A - A

NOTES SYMBOL

Conforms to JEDEC outline TO-220AC

MILLIMETERS INCHES

NOTES

A 4.25 4.65 0.167 0.183 E1 6.86 8.89 0.270 0.350 6

A1 1.14 1.40 0.045 0.055 E2 - 0.76 - 0.030 7

A2 2.56 2.92 0.101 0.115 e 2.41 2.67 0.095 0.105

b 0.69 1.01 0.027 0.040 e1 4.88 5.28 0.192 0.208

b1 0.38 0.97 0.015 0.038 4 H1 6.09 6.48 0.240 0.255 6, 7

b2 1.20 1.73 0.047 0.068 L 13.52 14.02 0.532 0.552

b3 1.14 1.73 0.045 0.068 4 L1 3.32 3.82 0.131 0.150 2

c 0.36 0.61 0.014 0.024 L3 1.78 2.13 0.070 0.084

c1 0.36 0.56 0.014 0.022 4 L4 0.76 1.27 0.030 0.050 2

D 14.85 15.25 0.585 0.600 3 Ø P 3.54 3.73 0.139 0.147

D1 8.38 9.02 0.330 0.355 Q 2.60 3.00 0.102 0.118

D2 11.68 12.88 0.460 0.507 6  90° to 93° 90° to 93°

E 10.11 10.51 0.398 0.414 3, 6

Notes

(1)

Dimensioning and tolerancing as per ASME Y14.5M-1994

(2)

Lead dimension and finish uncontrolled in L1

(3)

Dimension D, D1 and E do not include mold flash. Mold flash shall not exceed 0.127 mm (0.005") per side. These dimensions are measured
at the outermost extremes of the plastic body

(4)

Dimension b1, b3 and c1 apply to base metal only

(5)

Controlling dimension: inches

(6)

Thermal pad contour optional within dimensions E, H1, D2 and E1

(7)

Dimension E2 x H1 define a zone where stamping and singulation irregularities are allowed

(8)

Outline conforms to JEDEC TO-220, D2 (minimum) where dimensions are derived from the actual package outline

Document Number: 95221 For technical questions within your region, please contact one of the following: www.vishay.com
Revision: 07-Mar-11 [e-mail]

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