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  • The STEF12S is an integrated electronic fuse optimized for monitoring the 12 V DC power lines.

    When connected in series to the main power rail, it is able to precisely detect and react to overcurrent and overvoltage conditions.
    When an overload condition occurs, the device limits the output current to a safe value defined by the user. If the anomalous overload condition persists, the device goes into an open state, disconnecting the load from the power supply.
    In case of overvoltage on the input, the device regulates the output to a preset safe value.
    Undervoltage lockout prevents the load from malfunction, keeping the device off if the rail voltage is too low.
    STEF12S features the adjustable turn-on slew-rate, which is useful to keep the in-rush current under control during startup and hot-swap operations.
    On the DFN10 package a dedicated pin provides gate control for an external optional N-channel power FET, used to implement the reverse current blocking in case of input voltage loss.
    The STEF05S is a companion chip for the 5 V rails, useful to implement a complete power rail control in data-storage applications.

    Key Features

    • 15 V typical output over voltage clamp
    • Absolute maximum voltage of 25 V
    • Adjustable current limit
    • Thermal protection
    • Input under voltage lockout
    • Low inrush current during Start-Up
    • Integrated 40 mΩ Power FET
    • En/fault pin
    • Adjustable slew rate for output voltage
    • Gate control pin for reverse current blocking FET (DFN10 package)
    • TSOT23-8L and DFN10 (3x3 mm) packages
    • Latch (STEF12S) or auto-retry (STEF12SA) versions

Sample & Buy

Part Number
Package
Packing Type
Marketing Status
ECCN (US)
Country of Origin
Approximate Price (US$)* / Qty
Order from ST
Order from Distributors
STEF12SPUR DFN10 3X3 Tape And Reel
Active
EAR99 - 1.44 No availability of distributors reported, please contact our sales office
STEF12SGR TSOT 8L Tape And Reel
Active
EAR99 - 0.95 No availability of distributors reported, please contact our sales office
STEF12SAGR TSOT 8L Tape And Reel
Preview
EAR99 - No availability of distributors reported, please contact our sales office

STEF12SPUR

Package

DFN10 3X3

Packing Type

Tape And Reel

Approximate Price (US$)* / Qty

1.44

Marketing Status

Active

Budgetary Price (US$)* / Qty

1.44

ECCN (US)

EAR99

Country of Origin

-

STEF12SGR

Package

TSOT 8L

Packing Type

Tape And Reel

Approximate Price (US$)* / Qty

0.95

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.95

ECCN (US)

EAR99

Country of Origin

-

STEF12SAGR

Package

TSOT 8L

Packing Type

Tape And Reel

Approximate Price (US$)* / Qty

Marketing Status

Preview

Budgetary Price (US$)* / Qty

ECCN (US)

EAR99

Country of Origin

-

(*) 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

Recommended for you

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS13002
      Electronic fuse for 12 V line
      1.0
      1.16 MB
      PDF
      DS13002

      Electronic fuse for 12 V line

Publications and Collaterals

    • Description Version Size Action
      Linear and Switching Voltage Regulators Selection Guide 3.0
      370.88 KB
      PDF

      Linear and Switching Voltage Regulators Selection Guide

    • Description Version Size Action
      electronic Fuse quick Reference Guide 1.1
      989.09 KB
      PDF

      electronic Fuse quick Reference Guide

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STEF12SAGR
Preview
TSOT 8L Industrial Ecopack2
STEF12SGR
Active
TSOT 8L Industrial Ecopack2
STEF12SPUR
Active
DFN10 3X3 Industrial Ecopack2

STEF12SAGR

Package:

TSOT 8L

Material Declaration**:

Marketing Status

Preview

Package

TSOT 8L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STEF12SGR

Package:

TSOT 8L

Material Declaration**:

Marketing Status

Active

Package

TSOT 8L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STEF12SPUR

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.

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