Vishay 40L40CW, 40L45CW Data Sheet

Vishay High Power Products

Schottky Rectifier, 2 x 20 A

40L40CW/40L45CW

Base

common

cathode

2

FEATURES

• 150 °C TJ operation

• Center tap TO-247 package

• High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance

• Very low forward voltage drop

• High frequency operation

• Guard ring for enhanced ruggedness and long term
reliability

• Designed and qualified for industrial level

TO-2 47 AC

13

Anode

1

Common

cathode

Anode

2

2

DESCRIPTION

PRODUCT SUMMARY

I

F(AV)

V

R

2 x 20 A

40/45 V

The 40L..CW center tap Schottky rectifier 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 parallel switching power supplies.

MAJOR RATINGS AND CHARACTERISTICS

SYMBOL CHARACTERISTICS VALUES UNITS

I

F(AV)

V

RRM

I

FSM

V

F

T

J

Rectangular waveform 40 A

40/45 V

tp = 5 µs sine 1240 A

20 Apk, TJ = 125 °C (per leg, typical) 0.42 V

- 55 to 150 °C

VOLTAGE RATINGS

PARAMETER SYMBOL 40L40CW 40L45CW UNITS

Maximum DC reverse voltage V

Maximum working peak reverse voltage V

R

RWM

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 per leg
See fig. 7

Non-repetitive avalanche energy per leg E

Repetitive avalanche current per leg I

Document Number: 93344 For technical questions, contact: [e-mail]
Revision: 21-Aug-08 1

per leg

per device 40

I

F(AV)

I

FSM

AR

50 % duty cycle at TC = 122 °C, rectangular waveform

5 µs sine or 3 µs rect. pulse

10 ms sine or 6 ms rect. pulse 350

TJ = 25 °C, IAS = 3 A, L = 4.4 mH 20 mJ

AS

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

20

1240

A

3A

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40L40CW/40L45CW

Vishay High Power Products

Schottky Rectifier, 2 x 20 A

ELECTRICAL SPECIFICATIONS

PARAMETER SYMBOL TEST CONDITIONS TYP. MAX. UNITS

20 A

Maximum forward voltage drop per leg
See fig. 1

V

FM

40 A 0.61 0.69

(1)

20 A

40 A 0.60 0.70

Reverse leakage current per leg
See fig. 2

I

RM

Threshold voltage V

Forward slope resistance r

Maximum junction capacitance per leg C

Typical series inductance per leg L

F(TO)

TJ = 25 °C

(1)

T

= 100 °C 20 80

J

TJ =TJ maximum

t

VR = 5 VDC (test signal range 100 kHz to 1 MHz) 25 °C - 1500 pF

T

Measured lead to lead 5 mm from package body 7.5 - nH

S

Maximum voltage rate of change dV/dt Rated V

T

= 25 °C

J

= 125 °C

T

J

V

= Rated V

R

R

R

0.48 0.53

0.42 0.49

-1.5

0.27 V

8.72 mΩ

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 per leg

Maximum thermal resistance,
junction to case per package

Typical thermal resistance,
case to heatsink

Approximate weight

Mounting torque

minimum

maximum 12 (10)

Marking device Case style TO-247AC (JEDEC)

, T

T

J

Stg

DC operation
See fig. 4

R

thJC

DC operation 0.8

R

thCS

Mounting surface, smooth and greased 0.24

- 55 to 150 °C

1.6

°C/W

6g

0.21 oz.

Non-lubricated threads

6 (5)

kgf ⋅ cm

(lbf ⋅ in)

40L40CW

40L45CW

V

mA

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Document Number: 93344

2 Revision: 21-Aug-08

40L40CW/40L45CW

Schottky Rectifier, 2 x 20 A

1000

100

TJ = 150 °C
T

= 125 °C

J

= 25 °C

T

10

1

- Instantaneous Forward Current (A)

F

I

0

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8

V

- Forward Voltage Drop (V)

FM

Fig. 1 - Maximum Forward Voltage Drop Characteristics

J

(Per Leg)

10 000

Vishay High Power Products

1000

100

- Reverse Current (mA)

R

0.01

I

0.001

TJ = 150 °C

TJ = 125 °C

TJ = 100 °C

10

TJ = 75 °C

1

TJ = 50 °C

0.1

0

TJ = 25 °C

1051520

V

- Reverse Voltage (V)

R

Fig. 2 - Typical Values of Reverse Current vs.

Reverse Voltage (Per Leg)

25 30 35

40

45

1000

- Junction Capacitance (pF)

T

C

100

0

10 20 40 5030

TJ = 25 °C

VR - Reverse Voltage (V)

Fig. 3 - Typical Junction Capacitance vs. Reverse Voltage (Per Leg)

10

1

0.1

- Thermal Impedance (°C/W)

thJC

Z

0.01

0.00001 0.0001 0.001 0.01 0.1 1

Single pulse

(thermal resistance)

D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20

t1 - Rectangular Pulse Duration (s)

Fig. 4 - Maximum Thermal Impedance Z

Characteristics (Per Leg)

thJC

P

DM

Notes:

1. Duty factor D = t

2. Peak TJ = PDM x Z

t

1

t

2

1/t2

+ T

thJC

C

10 100

Document Number: 93344 For technical questions, contact: [e-mail]

www.vishay.com

Revision: 21-Aug-08 3