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  • The L4940 series of three-terminal positive regulators is available in TO-220 and D²PAK packages and with several fixed output voltages, making it useful in a wide range of industrial and consumer applications. Thanks to their very low input/output voltage drop, these devices are particularly suitable for battery-powered equipment, reducing consumption and prolonging battery-life. Each type employs internal current limiting, anti-saturation circuit, thermal shutdown and safe area protection.

    Key Features

    • Precise 5, 8.5, 12 V outputs
    • Low dropout voltage (450 mV typ. at 1 A)
    • Very low quiescent current
    • Thermal shutdown
    • Short-circuit protection
    • Reverse polarity protection

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L4940D2T12-TR
Active
D2PAK Industrial Ecopack2
L4940D2T5-TR
Active
D2PAK Industrial Ecopack2
L4940V5
Active
TO-220 Industrial Ecopack2
L4940V85
Active
TO-220 Industrial Ecopack2

L4940D2T12-TR

Package:

D2PAK

Material Declaration**:

Marketing Status

Active

Package

D2PAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L4940D2T5-TR

Package:

D2PAK

Material Declaration**:

Marketing Status

Active

Package

D2PAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L4940V5

Package:

TO-220

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L4940V85

Package:

TO-220

Material Declaration**:

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Output Voltage (V) (nom)
Budgetary Price (US$)*/Qty
More info
min
max
L4940V5 Available at 10 distributors

Distributor availability ofL4940V5

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3773 1 Order Now
COMPEL EUROPE 842 1 Order Now
RS COMPONENTS EUROPE 734 1 Order Now
AVNET AMERICA 370 0 Order Now
ARROW EUROPE 10813 0 Order Now
ARROW AMERICA 816 1000 Order Now
MOUSER WORLDWIDE 3095 1 Order Now
Farnell Element14 EUROPE 2762 1 Order Now
ANGLIA Live EUROPE 87 1 Order Now
RUTRONIK EUROPE 550 50 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

DIGIKEY

Stock

3773

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

842

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

734

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

370

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

10813

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

816

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

3095

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2762

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

87

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

550

Min.Order

50

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-23

Buy Direct
Active
EAR99 NEC Tube TO-220 -40 150 5 0.578 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

1.5

Unit Price (US$):

0.578

Country of Origin:

CHINA

L4940D2T12-TR Available at 8 distributors

Distributor availability ofL4940D2T12-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1420 1 Order Now
RS COMPONENTS EUROPE 715 1 Order Now
FUTURE WORLDWIDE 1000 1000 Order Now
ARROW EUROPE 1000 0 Order Now
Newark Element14 AMERICA 499 0 Order Now
ARROW AMERICA 4000 1000 Order Now
MOUSER WORLDWIDE 2813 1 Order Now
Farnell Element14 EUROPE 715 1 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

DIGIKEY

Stock

1420

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

715

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

1000

Min.Order

1000

Region

WORLDWIDE Order Now

ARROW

Stock

1000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

499

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

4000

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

2813

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

715

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-23

Buy Direct
Active
EAR99 NEC Tape And Reel D2PAK -40 150 12 0.497 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

1.5

Unit Price (US$):

0.497

Country of Origin:

CHINA

L4940D2T5-TR Available at 7 distributors

Distributor availability ofL4940D2T5-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1028 1 Order Now
RS COMPONENTS EUROPE 2755 5 Order Now
FUTURE WORLDWIDE 915 1 Order Now
ARROW EUROPE 2000 0 Order Now
ARROW AMERICA 42000 1000 Order Now
MOUSER WORLDWIDE 3795 1 Order Now
Farnell Element14 EUROPE 1889 1 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

DIGIKEY

Stock

1028

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2755

Min.Order

5

Region

EUROPE Order Now

FUTURE

Stock

915

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

2000

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

42000

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

3795

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1889

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-23

Buy Direct
Active
EAR99 NEC Tape And Reel D2PAK -40 150 5 0.497 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

1.5

Unit Price (US$):

0.497

Country of Origin:

CHINA

L4940V85 Available at 5 distributors

Distributor availability ofL4940V85

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1858 1 Order Now
COMPEL EUROPE 186 1 Order Now
RS COMPONENTS EUROPE 1050 5 Order Now
ARROW EUROPE 1690 0 Order Now
MOUSER WORLDWIDE 1845 1 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

DIGIKEY

Stock

1858

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

186

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

1050

Min.Order

5

Region

EUROPE Order Now

ARROW

Stock

1690

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

1845

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-23

Buy Direct
Active
EAR99 NEC Tube TO-220 -40 150 8.5 0.578 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

1.5

Unit Price (US$):

0.578

Country of Origin:

CHINA

L4940V5

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.578 / 1k

Distributor availability ofL4940V5

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3773 1 Order Now
COMPEL EUROPE 842 1 Order Now
RS COMPONENTS EUROPE 734 1 Order Now
AVNET AMERICA 370 0 Order Now
ARROW EUROPE 10813 0 Order Now
ARROW AMERICA 816 1000 Order Now
MOUSER WORLDWIDE 3095 1 Order Now
Farnell Element14 EUROPE 2762 1 Order Now
ANGLIA Live EUROPE 87 1 Order Now
RUTRONIK EUROPE 550 50 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

DIGIKEY

Stock

3773

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

842

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

734

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

370

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

10813

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

816

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

3095

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2762

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

87

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

550

Min.Order

50

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-23

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

-40

(max)

150

Output Voltage (V) (nom)

5

Output Tolerance (typ)

2

Output Current (A) (nom)

1.5

Budgetary Price (US$)* / Qty

0.578 / 1k

Country of Origin

CHINA

L4940D2T12-TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.497 / 1k

Distributor availability ofL4940D2T12-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1420 1 Order Now
RS COMPONENTS EUROPE 715 1 Order Now
FUTURE WORLDWIDE 1000 1000 Order Now
ARROW EUROPE 1000 0 Order Now
Newark Element14 AMERICA 499 0 Order Now
ARROW AMERICA 4000 1000 Order Now
MOUSER WORLDWIDE 2813 1 Order Now
Farnell Element14 EUROPE 715 1 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

DIGIKEY

Stock

1420

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

715

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

1000

Min.Order

1000

Region

WORLDWIDE Order Now

ARROW

Stock

1000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

499

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

4000

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

2813

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

715

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-23

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

D2PAK

Operating Temperature (°C)

(min)

-40

(max)

150

Output Voltage (V) (nom)

12

Output Tolerance (typ)

2

Output Current (A) (nom)

1.5

Budgetary Price (US$)* / Qty

0.497 / 1k

Country of Origin

CHINA

L4940D2T5-TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.497 / 1k

Distributor availability ofL4940D2T5-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1028 1 Order Now
RS COMPONENTS EUROPE 2755 5 Order Now
FUTURE WORLDWIDE 915 1 Order Now
ARROW EUROPE 2000 0 Order Now
ARROW AMERICA 42000 1000 Order Now
MOUSER WORLDWIDE 3795 1 Order Now
Farnell Element14 EUROPE 1889 1 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

DIGIKEY

Stock

1028

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2755

Min.Order

5

Region

EUROPE Order Now

FUTURE

Stock

915

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

2000

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

42000

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

3795

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1889

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-23

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

D2PAK

Operating Temperature (°C)

(min)

-40

(max)

150

Output Voltage (V) (nom)

5

Output Tolerance (typ)

2

Output Current (A) (nom)

1.5

Budgetary Price (US$)* / Qty

0.497 / 1k

Country of Origin

CHINA

L4940V85

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.578 / 1k

Distributor availability ofL4940V85

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1858 1 Order Now
COMPEL EUROPE 186 1 Order Now
RS COMPONENTS EUROPE 1050 5 Order Now
ARROW EUROPE 1690 0 Order Now
MOUSER WORLDWIDE 1845 1 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

DIGIKEY

Stock

1858

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

186

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

1050

Min.Order

5

Region

EUROPE Order Now

ARROW

Stock

1690

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

1845

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-23

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

-40

(max)

150

Output Voltage (V) (nom)

8.5

Output Tolerance (typ)

2

Output Current (A) (nom)

1.5

Budgetary Price (US$)* / Qty

0.578 / 1k

Country of Origin

CHINA

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors