L78S

Active

positive voltage regulator

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Overview
Online design
Sample & Buy
Solutions
Documentation
CAD Resources
Tools & Software
Quality & Reliability
Partner products
Sales Briefcase

Product overview

Description

The L78S series of three-terminal positive regulators is available in TO-220 package and several fixed output voltages, making it useful in a wide range of applications. These regulators can provide local on-card regulation, eliminating the distribution problems associated with single point regulation. Each type embeds internal current limiting, thermal shut-down and safe area protection, making it essentially indestructible. If adequate heat sinking is provided, they can deliver over 2 A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents.
  • All features

    • Output current up to 2 A
    • Output voltages of 5; 7.5; 9; 10; 12; 15; 18; 24 V
    • Thermal protection
    • Short circuit protection
    • Output transition SOA protection

EDA Symbols, Footprints and 3D Models

STMicroelectronics - L78S

Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.

Symbols

Symbols

Footprints

Footprints

3D model

3D models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L78S05CV
Active
TO-220 Industrial Ecopack2
L78S09CV
Active
TO-220 Industrial Ecopack2
L78S10CV
Active
TO-220 Industrial Ecopack2
L78S12CV
Active
TO-220 Industrial Ecopack2
L78S15CV
Active
TO-220 Industrial Ecopack2
L78S18CV
Active
TO-220 Industrial Ecopack2
L78S24CV
Active
TO-220 Industrial Ecopack2
L78S75CV
Active
TO-220 Industrial Ecopack2

L78S05CV

Package:

TO-220

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L78S09CV

Package:

TO-220

Material Declaration**:

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L78S10CV

Package:

TO-220

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L78S12CV

Package:

TO-220

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L78S15CV

Package:

TO-220

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L78S18CV

Package:

TO-220

Material Declaration**:

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L78S24CV

Package:

TO-220

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L78S75CV

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) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L78S75CV Available at 3 distributors

Distributor availability ofL78S75CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1176 1 Buy from Distributor
RS COMPONENTS EUROPE 929 10 Buy from Distributor
MOUSER WORLDWIDE 327 1 Buy from Distributor

Distributor reported inventory date: 2022-01-18

Distributor Name

DIGIKEY

Stock

1176

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

929

Min.Order

10

MOUSER

Stock

327

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-01-18

Buy Direct
Active
EAR99 NEC Tube TO-220 0 150 CHINA 0.3757 / 1k
L78S10CV Available at 6 distributors

Distributor availability ofL78S10CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 168 1 Buy from Distributor
RS COMPONENTS EUROPE 2650 50 Buy from Distributor
AVNET AMERICA 3000 0 Buy from Distributor
Newark Element14 AMERICA 394 0 Buy from Distributor
MOUSER WORLDWIDE 2291 1 Buy from Distributor
Farnell Element14 EUROPE 1983 1 Buy from Distributor

Distributor reported inventory date: 2022-01-18

Distributor Name

DIGIKEY

Stock

168

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

2650

Min.Order

50

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Buy from Distributor

Newark Element14

Stock

394

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

2291

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

1983

Min.Order

1

Distributor reported inventory date: 2022-01-18

Buy Direct
Active
EAR99 NEC Tube TO-220 0 150 CHINA 0.3353 / 1k
L78S24CV Available at 5 distributors

Distributor availability ofL78S24CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 580 1 Buy from Distributor
RS COMPONENTS EUROPE 40 10 Buy from Distributor
MOUSER WORLDWIDE 37 1 Buy from Distributor
Farnell Element14 EUROPE 2511 1 Buy from Distributor
ANGLIA Live EUROPE 954 1 Buy from Distributor

Distributor reported inventory date: 2022-01-18

Distributor Name

DIGIKEY

Stock

580

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

40

Min.Order

10

MOUSER

Stock

37

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

2511

Min.Order

1

ANGLIA Live

Stock

954

Min.Order

1

Distributor reported inventory date: 2022-01-18

Buy Direct
Active
EAR99 NEC Tube TO-220 0 150 CHINA 0.3618 / 1k
L78S05CV Available at 8 distributors

Distributor availability ofL78S05CV

Distributor Name
Region Stock Min. Order Third party link
COMPEL EUROPE 1136 1 Buy from Distributor
RS COMPONENTS EUROPE 1400 50 Buy from Distributor
AVNET AMERICA 83 0 Buy from Distributor
FUTURE WORLDWIDE 5593 1 Buy from Distributor
Newark Element14 AMERICA 92 0 Buy from Distributor
MOUSER WORLDWIDE 6681 1 Buy from Distributor
Farnell Element14 EUROPE 7874 1 Buy from Distributor
ANGLIA Live EUROPE 2792 1 Buy from Distributor

Distributor reported inventory date: 2022-01-18

Distributor Name

COMPEL

Stock

1136

Min.Order

1

RS COMPONENTS

Stock

1400

Min.Order

50

AVNET

Stock

83

Min.Order

0

Region

AMERICA Buy from Distributor

FUTURE

Stock

5593

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Newark Element14

Stock

92

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

6681

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

7874

Min.Order

1

ANGLIA Live

Stock

2792

Min.Order

1

Distributor reported inventory date: 2022-01-18

Buy Direct
Active
EAR99 NEC Tube TO-220 0 150 CHINA 0.3353 / 1k
L78S18CV Available at 5 distributors

Distributor availability ofL78S18CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1809 1 Buy from Distributor
RS COMPONENTS EUROPE 50 10 Buy from Distributor
Newark Element14 AMERICA 164 0 Buy from Distributor
MOUSER WORLDWIDE 1868 1 Buy from Distributor
Farnell Element14 EUROPE 982 1 Buy from Distributor

Distributor reported inventory date: 2022-01-18

Distributor Name

DIGIKEY

Stock

1809

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

50

Min.Order

10

Newark Element14

Stock

164

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

1868

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

982

Min.Order

1

Distributor reported inventory date: 2022-01-18

Buy Direct
Active
EAR99 NEC Tube TO-220 0 150 CHINA 0.3659 / 1k
L78S09CV Available at 4 distributors

Distributor availability ofL78S09CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 269 1 Buy from Distributor
RS COMPONENTS EUROPE 80 10 Buy from Distributor
MOUSER WORLDWIDE 5666 1 Buy from Distributor
Farnell Element14 EUROPE 1932 1 Buy from Distributor

Distributor reported inventory date: 2022-01-18

Distributor Name

DIGIKEY

Stock

269

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

80

Min.Order

10

MOUSER

Stock

5666

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

1932

Min.Order

1

Distributor reported inventory date: 2022-01-18

Buy Direct
Active
EAR99 NEC Tube TO-220 0 150 CHINA 0.3353 / 1k
L78S15CV Available at 4 distributors

Distributor availability ofL78S15CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2210 1 Buy from Distributor
COMPEL EUROPE 1393 1 Buy from Distributor
MOUSER WORLDWIDE 2320 1 Buy from Distributor
ANGLIA Live EUROPE 19829 1 Buy from Distributor

Distributor reported inventory date: 2022-01-18

Distributor Name

DIGIKEY

Stock

2210

Min.Order

1

Region

WORLDWIDE Buy from Distributor

COMPEL

Stock

1393

Min.Order

1

MOUSER

Stock

2320

Min.Order

1

Region

WORLDWIDE Buy from Distributor

ANGLIA Live

Stock

19829

Min.Order

1

Distributor reported inventory date: 2022-01-18

Buy Direct
Active
EAR99 NEC Tube TO-220 0 150 CHINA 0.3618 / 1k
L78S12CV Available at 6 distributors

Distributor availability ofL78S12CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5662 1 Buy from Distributor
COMPEL EUROPE 950 1 Buy from Distributor
RS COMPONENTS EUROPE 349 50 Buy from Distributor
AVNET AMERICA 984 0 Buy from Distributor
Farnell Element14 EUROPE 5815 1 Buy from Distributor
ANGLIA Live EUROPE 1429 1 Buy from Distributor

Distributor reported inventory date: 2022-01-18

Distributor Name

DIGIKEY

Stock

5662

Min.Order

1

Region

WORLDWIDE Buy from Distributor

COMPEL

Stock

950

Min.Order

1

RS COMPONENTS

Stock

349

Min.Order

50

AVNET

Stock

984

Min.Order

0

Region

AMERICA Buy from Distributor

Farnell Element14

Stock

5815

Min.Order

1

ANGLIA Live

Stock

1429

Min.Order

1

Distributor reported inventory date: 2022-01-18

Active
EAR99 NEC Tube TO-220 0 150 CHINA 0.3353 / 1k

L78S75CV

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.3757 / 1k

Distributor availability ofL78S75CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1176 1 Buy from Distributor
RS COMPONENTS EUROPE 929 10 Buy from Distributor
MOUSER WORLDWIDE 327 1 Buy from Distributor

Distributor reported inventory date: 2022-01-18

Distributor Name

DIGIKEY

Stock

1176

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

929

Min.Order

10

MOUSER

Stock

327

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-01-18

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

0

(max)

150

Budgetary Price (US$)* / Qty

0.3757 / 1k

Country of Origin

CHINA

L78S10CV

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.3353 / 1k

Distributor availability ofL78S10CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 168 1 Buy from Distributor
RS COMPONENTS EUROPE 2650 50 Buy from Distributor
AVNET AMERICA 3000 0 Buy from Distributor
Newark Element14 AMERICA 394 0 Buy from Distributor
MOUSER WORLDWIDE 2291 1 Buy from Distributor
Farnell Element14 EUROPE 1983 1 Buy from Distributor

Distributor reported inventory date: 2022-01-18

Distributor Name

DIGIKEY

Stock

168

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

2650

Min.Order

50

AVNET

Stock

3000

Min.Order

0

Region

AMERICA Buy from Distributor

Newark Element14

Stock

394

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

2291

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

1983

Min.Order

1

Distributor reported inventory date: 2022-01-18

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

0

(max)

150

Budgetary Price (US$)* / Qty

0.3353 / 1k

Country of Origin

CHINA

L78S24CV

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.3618 / 1k

Distributor availability ofL78S24CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 580 1 Buy from Distributor
RS COMPONENTS EUROPE 40 10 Buy from Distributor
MOUSER WORLDWIDE 37 1 Buy from Distributor
Farnell Element14 EUROPE 2511 1 Buy from Distributor
ANGLIA Live EUROPE 954 1 Buy from Distributor

Distributor reported inventory date: 2022-01-18

Distributor Name

DIGIKEY

Stock

580

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

40

Min.Order

10

MOUSER

Stock

37

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

2511

Min.Order

1

ANGLIA Live

Stock

954

Min.Order

1

Distributor reported inventory date: 2022-01-18

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

0

(max)

150

Budgetary Price (US$)* / Qty

0.3618 / 1k

Country of Origin

CHINA

L78S05CV

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.3353 / 1k

Distributor availability ofL78S05CV

Distributor Name
Region Stock Min. Order Third party link
COMPEL EUROPE 1136 1 Buy from Distributor
RS COMPONENTS EUROPE 1400 50 Buy from Distributor
AVNET AMERICA 83 0 Buy from Distributor
FUTURE WORLDWIDE 5593 1 Buy from Distributor
Newark Element14 AMERICA 92 0 Buy from Distributor
MOUSER WORLDWIDE 6681 1 Buy from Distributor
Farnell Element14 EUROPE 7874 1 Buy from Distributor
ANGLIA Live EUROPE 2792 1 Buy from Distributor

Distributor reported inventory date: 2022-01-18

Distributor Name

COMPEL

Stock

1136

Min.Order

1

RS COMPONENTS

Stock

1400

Min.Order

50

AVNET

Stock

83

Min.Order

0

Region

AMERICA Buy from Distributor

FUTURE

Stock

5593

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Newark Element14

Stock

92

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

6681

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

7874

Min.Order

1

ANGLIA Live

Stock

2792

Min.Order

1

Distributor reported inventory date: 2022-01-18

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

0

(max)

150

Budgetary Price (US$)* / Qty

0.3353 / 1k

Country of Origin

CHINA

L78S18CV

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.3659 / 1k

Distributor availability ofL78S18CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1809 1 Buy from Distributor
RS COMPONENTS EUROPE 50 10 Buy from Distributor
Newark Element14 AMERICA 164 0 Buy from Distributor
MOUSER WORLDWIDE 1868 1 Buy from Distributor
Farnell Element14 EUROPE 982 1 Buy from Distributor

Distributor reported inventory date: 2022-01-18

Distributor Name

DIGIKEY

Stock

1809

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

50

Min.Order

10

Newark Element14

Stock

164

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

1868

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

982

Min.Order

1

Distributor reported inventory date: 2022-01-18

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

0

(max)

150

Budgetary Price (US$)* / Qty

0.3659 / 1k

Country of Origin

CHINA

L78S09CV

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.3353 / 1k

Distributor availability ofL78S09CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 269 1 Buy from Distributor
RS COMPONENTS EUROPE 80 10 Buy from Distributor
MOUSER WORLDWIDE 5666 1 Buy from Distributor
Farnell Element14 EUROPE 1932 1 Buy from Distributor

Distributor reported inventory date: 2022-01-18

Distributor Name

DIGIKEY

Stock

269

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

80

Min.Order

10

MOUSER

Stock

5666

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

1932

Min.Order

1

Distributor reported inventory date: 2022-01-18

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

0

(max)

150

Budgetary Price (US$)* / Qty

0.3353 / 1k

Country of Origin

CHINA

L78S15CV

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.3618 / 1k

Distributor availability ofL78S15CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2210 1 Buy from Distributor
COMPEL EUROPE 1393 1 Buy from Distributor
MOUSER WORLDWIDE 2320 1 Buy from Distributor
ANGLIA Live EUROPE 19829 1 Buy from Distributor

Distributor reported inventory date: 2022-01-18

Distributor Name

DIGIKEY

Stock

2210

Min.Order

1

Region

WORLDWIDE Buy from Distributor

COMPEL

Stock

1393

Min.Order

1

MOUSER

Stock

2320

Min.Order

1

Region

WORLDWIDE Buy from Distributor

ANGLIA Live

Stock

19829

Min.Order

1

Distributor reported inventory date: 2022-01-18

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

0

(max)

150

Budgetary Price (US$)* / Qty

0.3618 / 1k

Country of Origin

CHINA

L78S12CV

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.3353 / 1k

Distributor availability ofL78S12CV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5662 1 Buy from Distributor
COMPEL EUROPE 950 1 Buy from Distributor
RS COMPONENTS EUROPE 349 50 Buy from Distributor
AVNET AMERICA 984 0 Buy from Distributor
Farnell Element14 EUROPE 5815 1 Buy from Distributor
ANGLIA Live EUROPE 1429 1 Buy from Distributor

Distributor reported inventory date: 2022-01-18

Distributor Name

DIGIKEY

Stock

5662

Min.Order

1

Region

WORLDWIDE Buy from Distributor

COMPEL

Stock

950

Min.Order

1

RS COMPONENTS

Stock

349

Min.Order

50

AVNET

Stock

984

Min.Order

0

Region

AMERICA Buy from Distributor

Farnell Element14

Stock

5815

Min.Order

1

ANGLIA Live

Stock

1429

Min.Order

1

Distributor reported inventory date: 2022-01-18

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

0

(max)

150

Budgetary Price (US$)* / Qty

0.3353 / 1k

Country of Origin

CHINA

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