LTC4381CDKE-4#PBF

Overview

The LTC4381CDKE-4#PBF is a board-mount surge protector manufactured by Analog Devices Inc. It operates within a voltage range of 4 V to 80 V and supports a current rating of 500 mA. The device functions as a low quiescent current eFuse with SMD/SMT termination in a DFN-32 package measuring 7 mm x 5 mm x 0.75 mm. It is rated for an operating temperature range from -40°C to +125°C.

Feature Summary

• Provides integrated board-level surge protection against overvoltage and reverse polarity events
• Functions as a low quiescent current electronic fuse (eFuse) for power path management
• Features automatic retry capability to restore power after fault conditions clear

Applications

• Automotive electronics systems requiring robust power input protection
• Industrial equipment needing reliable surge suppression on DC power lines
• Network infrastructure components protected against transient voltage spikes

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm availability status as distribution channels may report limited stock or discontinuation notices. Ensure the DFN-32 package dimensions match your PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select this component for applications requiring high voltage tolerance up to 80 V and moderate current handling at 500 mA. The wide operating temperature range suits harsh environments. Compare against the LTC4381ADKE-4 variant if automotive grade qualification is required instead of industrial specifications.

Part Context

This part belongs to the LTC4381 series of current surge stoppers designed for protecting sensitive downstream circuitry. It integrates control logic with a power MOSFET to manage power path faults efficiently without external complex driver circuits, simplifying system design for power integrity.

Replacement Considerations

LTC4381ADKE-4#PBF serves as the automotive-grade equivalent within the same family.