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  • The STEF12 is an integrated electronic fuse optimized for monitoring output current and input voltage. Connected in series to a 12 V rail, it is capable of protecting the electronic circuitry on its output from overcurrent and overvoltage. The device has a controlled delay and turn-on time.

    When an overload condition occurs, the STEF12 limits the output current to a predefined safe value. If the anomalous overload condition persists it goes into an open state, disconnecting the load from the power supply. If a continuous short-circuit is present on the board, when power is re-applied the E-fuse initially limits the output current to a safe value and then again goes into an open state.
    The device is equipped with a thermal protection circuit. The intervention of the thermal protection is signal led to the board monitoring circuits through a signal on the Fault pin.
    Unlike the mechanical fuses, which must be physically replaced after a single event, the Efuse does not degrade in its performance after short-circuit/thermal protection interventions and it is reset either by recycling the supply voltage or using the Enable pin.
    The companion chip for the 5 V power rails is also available with part number STEF05.

    Key Features

    • Continuous current (typ): 3.6 A
    • N-channel on-resistance (typ): 53 mΩ
    • Enable/Fault functions
    • Output clamp voltage (typ): 15 V
    • Undervoltage lockout
    • Short-circuit limit
    • Overload current limit
    • Controlled output voltage ramp
    • Thermal latch (typ): 165 °C
    • Operating junction temp. - 40 °C to 125 °C
    • Available in DFN10 (3x3 mm) package

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    • Part number
      Status
      Description
      Type
      Supplier

      STEVAL-IFP021V1

      NRND

      5 V and 12 V power line protection based on STEF05 and STEF12 electronic fuses

      Process Control and Automation Solution Eval Boards --
      STEVAL-IFP021V1

      Description:

      5 V and 12 V power line protection based on STEF05 and STEF12 electronic fuses

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STMicroelectronics - STEF12

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STEF12PUR
Active
DFN10 3X3 Industrial Ecopack2

STEF12PUR

Package:

DFN10 3X3

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN10 3X3

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
STEF12PUR Available at 7 distributors

Distributor availability ofSTEF12PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1110 1 Order Now
COMPEL EUROPE 1 1 Order Now
RS COMPONENTS EUROPE 3070 1 Order Now
AVNET AMERICA 9000 0 Order Now
ARROW EUROPE 3000 0 Order Now
MOUSER WORLDWIDE 4224 1 Order Now
Farnell Element14 EUROPE 644 1 Order Now

Distributor reported inventory date: 2020-12-02

Distributor Name

DIGIKEY

Stock

1110

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

1

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

3070

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

9000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

4224

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

644

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-12-02

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel DFN10 3X3 -40 125 CHINA 0.596 / 1k

STEF12PUR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.596 / 1k

Distributor availability ofSTEF12PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1110 1 Order Now
COMPEL EUROPE 1 1 Order Now
RS COMPONENTS EUROPE 3070 1 Order Now
AVNET AMERICA 9000 0 Order Now
ARROW EUROPE 3000 0 Order Now
MOUSER WORLDWIDE 4224 1 Order Now
Farnell Element14 EUROPE 644 1 Order Now

Distributor reported inventory date: 2020-12-02

Distributor Name

DIGIKEY

Stock

1110

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

1

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

3070

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

9000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

4224

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

644

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-12-02

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN10 3X3

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

0.596 / 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