STEF033APUR

The STMicroelectronics STEF033APUR is an electronic fuse that provides overcurrent and overvoltage protection for electronic circuitry. It monitors output current and input voltage, limiting current to a safe value during overloads and disconnecting the load if the overload persists. The device features a controlled turn-on time and a thermal protection circuit that signals intervention via a Fault pin.

Key electrical specifications include a typical continuous current rating of 3.6A (2.5A for Flip Chip variants) and a typical N-channel on-resistance of 40 mΩ (25 mΩ for Flip Chip). It offers an output clamp voltage of 4.5V and operates within a voltage range of 3.1V to 8V. The operative junction temperature range is -40°C to 125°C, with a typical thermal latch at 160°C.

This electronic fuse is available in a 10-DFN (3x3) or Flip Chip 9 bumps package, both utilizing surface mount technology. Unlike mechanical fuses, the STEF033APUR does not degrade after protection intervention and can be reset by cycling the supply voltage or using the Enable pin. It is also available in latching and auto-retry versions.

Applications for the STEF033APUR include hard disk drives, solid-state drives (SSD), hard disk and SSD arrays, computers, and DVD/Blu-Ray disc drivers.