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  • The STEF12E 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 STEF12E 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 signalled 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. 45 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
    • Uses tiny capacitors
    • Operating junction temp. -40 °C to 125 °C
    • Available in DFN10 (3x3 mm) package

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STMicroelectronics - STEF12E

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STEF12EPUR
Active
DFN10 3X3 Industrial Ecopack2

STEF12EPUR

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
STEF12EPUR Available at 3 distributors

Distributor availability ofSTEF12EPUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2736 1 Order Now
MOUSER WORLDWIDE 3185 1 Order Now
Farnell Element14 EUROPE 2790 1 Order Now

Distributor reported inventory date: 2020-12-04

Distributor Name

DIGIKEY

Stock

2736

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

3185

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2790

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-12-04

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

STEF12EPUR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.596 / 1k

Distributor availability ofSTEF12EPUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2736 1 Order Now
MOUSER WORLDWIDE 3185 1 Order Now
Farnell Element14 EUROPE 2790 1 Order Now

Distributor reported inventory date: 2020-12-04

Distributor Name

DIGIKEY

Stock

2736

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

3185

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2790

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-12-04

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