STEF12PUR Active

Electronic fuse for 12 V line
Operating Temp Min Celsius-40.0
Operating Temp Max Celsius125.0
Packing TypeTape And Reel
ROHS Compliance GradeEcopack2
Package NameDFN10 3X3
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

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.

In stock:
Range Unit Price Savings
1 - 9$1.450%
10 - 99$1.2316%
100 - 499$0.8442%
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