STEF05PUR eFuses and hot-swap ICs by STMicroelectronics

Electronic fuse for 5 V line


The STEF05 is an integrated electronic fuse optimized for monitoring output current and input voltage. Connected in series to a 5 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 STEF05 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 mechanical fuses, which must be physically replaced after a single event, the E-fuse 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 12 V power rails is also available with part number STEF12.

Where to Buy

Prices starting from US$0.47

Distributor Stock
Logo for Farnell
Farnell
from US$0.47
No stock
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Logo for Future Electronics
Future Electronics
from US$0.49
-
Buy Now
Logo for Avnet America
Avnet America
from US$0.50
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Buy Now
Logo for EBV Elektronik
EBV Elektronik
-
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Logo for Avnet Silica
Avnet Silica
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Features

Continuous current (typ): 3.6 A
N-channel on-resistance (typ): 40 mΩ
Enable/Fault functions
Output clamp voltage (typ): 6.65 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

Alternative Descriptions

VDFPN 3X3X1.0 10 PITCH 0.50 | Future Electronics
Circuit Protection Misc Electronic Fuse for 5V Line | Avnet America
ELECTRONIC FUSE, 5V, 10DFN | Farnell


Frequently Asked Questions

Where can I find additional details, specifications and documents for a STEF05PUR?

Additional datasheets, footprints and schematics for STEF05PUR are listed on our Part Details page. You can also find images and similar parts to STEF05PUR on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for STEF05PUR on our Product Comparison page. Access via the 'View Pricing & Stock' button to view STEF05PUR price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does STEF05PUR fall under?

The STEF05PUR is listed under Power Management > eFuses and hot-swap ICs > E-fuses.

Can I view similar or alternative parts?

You can view similar parts to STEF05PUR when available in the E-fuses range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the STEF05PUR you can contact the distributor directly for product support, shipping queries etc.

Is the STEF05PUR RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by STMicroelectronics.

Which authorised distributors for STEF05PUR have stock available?

Authorised distributors including Future Electronics, Avnet America, Farnell, EBV Elektronik and Avnet Silica have stock available or on a lead time for STEF05PUR.

How do I check stock and lead times for all distributors?

Stock availability and lead times will be displayed for STEF05PUR often in real-time on the comparison pages.

What if I can't find stock of STEF05PUR?

You can fill out our help required form which you can use to request a quote for STEF05PUR from some of our verified obsolescence suppliers. Alternatively, contact us via our web chat in the bottom left of your screen and one of our team will try to help.

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